./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix001.opt.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/mix001.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix001.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:40:28,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:40:28,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:40:28,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:40:28,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:40:28,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:40:28,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:40:28,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:40:28,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:40:28,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:40:28,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:40:28,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:40:28,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:40:28,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:40:28,638 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:40:28,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:40:28,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:40:28,639 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:40:28,639 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:40:28,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:40:28,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:40:28,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:40:28,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:40:28,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:40:28,641 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:40:28,641 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:40:28,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:40:28,641 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:40:28,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:40:28,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:40:28,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:40:28,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:40:28,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:40:28,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:40:28,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:40:28,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:40:28,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:40:28,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:40:28,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:40:28,644 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:40:28,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:40:28,645 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:40:28,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:40:28,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:40:28,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:40:28,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:40:28,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:40:28,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:40:28,913 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:40:28,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-20 15:40:29,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:40:30,044 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:40:30,045 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-20 15:40:30,058 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88588e4d/b14ab3d458934ba0845f754d7fa0536c/FLAGc6ffe4d80 [2024-06-20 15:40:30,071 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c88588e4d/b14ab3d458934ba0845f754d7fa0536c [2024-06-20 15:40:30,073 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:40:30,074 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:40:30,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix001.opt.yml/witness.yml [2024-06-20 15:40:30,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:40:30,207 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:40:30,207 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:40:30,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:40:30,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:40:30,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:40:30" (1/2) ... [2024-06-20 15:40:30,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a56f78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:40:30, skipping insertion in model container [2024-06-20 15:40:30,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:40:30" (1/2) ... [2024-06-20 15:40:30,214 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38168c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:40:30, skipping insertion in model container [2024-06-20 15:40:30,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:30" (2/2) ... [2024-06-20 15:40:30,214 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a56f78e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:30, skipping insertion in model container [2024-06-20 15:40:30,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:30" (2/2) ... [2024-06-20 15:40:30,215 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:40:30,290 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:40:30,292 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:40:30,292 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:40:30,292 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-20 15:40:30,292 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:40:30,293 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-20 15:40:30,334 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:40:30,648 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:40:30,657 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:40:30,790 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:40:30,825 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:40:30,825 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:30 WrapperNode [2024-06-20 15:40:30,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:40:30,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:40:30,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:40:30,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:40:30,832 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,844 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,872 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-20 15:40:30,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:40:30,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:40:30,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:40:30,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:40:30,906 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,907 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,923 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,947 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 15:40:30,948 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,948 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,955 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,956 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,958 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,959 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:40:30,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:40:30,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:40:30,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:40:30,963 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 03:40:30" (1/1) ... [2024-06-20 15:40:30,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:40:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:40:31,013 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 15:40:31,020 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 15:40:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:40:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:40:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:40:31,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:40:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:40:31,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:40:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:40:31,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:40:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:40:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:40:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:40:31,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:40:31,053 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 15:40:31,165 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:40:31,167 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:40:31,505 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:40:31,506 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:40:31,648 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:40:31,649 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:40:31,649 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:40:31 BoogieIcfgContainer [2024-06-20 15:40:31,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:40:31,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:40:31,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:40:31,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:40:31,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:40:30" (1/4) ... [2024-06-20 15:40:31,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238779d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:40:31, skipping insertion in model container [2024-06-20 15:40:31,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:30" (2/4) ... [2024-06-20 15:40:31,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238779d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:40:31, skipping insertion in model container [2024-06-20 15:40:31,660 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 03:40:30" (3/4) ... [2024-06-20 15:40:31,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238779d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:40:31, skipping insertion in model container [2024-06-20 15:40:31,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:40:31" (4/4) ... [2024-06-20 15:40:31,662 INFO L112 eAbstractionObserver]: Analyzing ICFG mix001.opt.i [2024-06-20 15:40:31,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:40:31,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:40:31,676 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:40:31,740 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:40:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 15:40:31,795 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-20 15:40:31,796 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:40:31,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:40:31,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 15:40:31,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-20 15:40:31,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:40:31,818 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;@77caa18f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:40:31,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:40:31,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:40:31,822 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:40:31,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:40:31,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:31,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:40:31,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:31,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash 402627273, now seen corresponding path program 1 times [2024-06-20 15:40:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:31,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350009123] [2024-06-20 15:40:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:31,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:32,949 INFO 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 15:40:32,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350009123] [2024-06-20 15:40:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350009123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:32,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:32,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:40:32,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106081326] [2024-06-20 15:40:32,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:32,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:40:32,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:40:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:40:33,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-20 15:40:33,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:33,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:33,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-20 15:40:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:33,323 INFO L124 PetriNetUnfolderBase]: 869/1413 cut-off events. [2024-06-20 15:40:33,324 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 15:40:33,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 1413 events. 869/1413 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7439 event pairs, 566 based on Foata normal form. 1/1349 useless extension candidates. Maximal degree in co-relation 2779. Up to 1315 conditions per place. [2024-06-20 15:40:33,334 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 15:40:33,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 171 flow [2024-06-20 15:40:33,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:40:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:40:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-20 15:40:33,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-06-20 15:40:33,344 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 85 transitions. [2024-06-20 15:40:33,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 171 flow [2024-06-20 15:40:33,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:33,348 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-20 15:40:33,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 15:40:33,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-20 15:40:33,351 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-20 15:40:33,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:33,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:33,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:40:33,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:33,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 378898490, now seen corresponding path program 1 times [2024-06-20 15:40:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630273860] [2024-06-20 15:40:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:34,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:34,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630273860] [2024-06-20 15:40:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630273860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:34,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:40:34,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141399157] [2024-06-20 15:40:34,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:34,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:40:34,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:40:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:40:34,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:40:34,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:34,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:34,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:40:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:34,584 INFO L124 PetriNetUnfolderBase]: 1280/1980 cut-off events. [2024-06-20 15:40:34,584 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-06-20 15:40:34,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 1980 events. 1280/1980 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10119 event pairs, 750 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 4489. Up to 1897 conditions per place. [2024-06-20 15:40:34,594 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 15:40:34,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-20 15:40:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:40:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:40:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-20 15:40:34,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-20 15:40:34,596 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-20 15:40:34,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-20 15:40:34,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:40:34,599 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-20 15:40:34,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-20 15:40:34,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-20 15:40:34,600 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-20 15:40:34,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:34,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:34,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:34,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:40:34,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:34,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:34,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1139047968, now seen corresponding path program 1 times [2024-06-20 15:40:34,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:34,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594244199] [2024-06-20 15:40:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:34,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:35,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594244199] [2024-06-20 15:40:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594244199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:35,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:35,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:40:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841002351] [2024-06-20 15:40:35,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:40:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:40:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:40:35,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:40:35,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:35,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:35,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:40:35,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:35,949 INFO L124 PetriNetUnfolderBase]: 1274/2001 cut-off events. [2024-06-20 15:40:35,950 INFO L125 PetriNetUnfolderBase]: For 1129/1129 co-relation queries the response was YES. [2024-06-20 15:40:35,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5030 conditions, 2001 events. 1274/2001 cut-off events. For 1129/1129 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10378 event pairs, 608 based on Foata normal form. 3/2000 useless extension candidates. Maximal degree in co-relation 5016. Up to 1873 conditions per place. [2024-06-20 15:40:35,960 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 46 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-20 15:40:35,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 320 flow [2024-06-20 15:40:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:40:35,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:40:35,962 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:40:35,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 320 flow [2024-06-20 15:40:35,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 306 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:35,964 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-20 15:40:35,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 15:40:35,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-20 15:40:35,965 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-20 15:40:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:35,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:35,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:35,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:40:35,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:35,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1246507511, now seen corresponding path program 1 times [2024-06-20 15:40:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:35,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233936086] [2024-06-20 15:40:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:36,584 INFO 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 15:40:36,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:36,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233936086] [2024-06-20 15:40:36,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233936086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:36,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:36,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:40:36,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106554458] [2024-06-20 15:40:36,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:36,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:40:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:40:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:40:36,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:40:36,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 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 15:40:36,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:36,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:40:36,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:37,225 INFO L124 PetriNetUnfolderBase]: 1546/2453 cut-off events. [2024-06-20 15:40:37,226 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2024-06-20 15:40:37,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 2453 events. 1546/2453 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12789 event pairs, 853 based on Foata normal form. 2/2408 useless extension candidates. Maximal degree in co-relation 6586. Up to 2282 conditions per place. [2024-06-20 15:40:37,240 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 15:40:37,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 316 flow [2024-06-20 15:40:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-20 15:40:37,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-20 15:40:37,242 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 5 states and 106 transitions. [2024-06-20 15:40:37,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 316 flow [2024-06-20 15:40:37,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:37,245 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 196 flow [2024-06-20 15:40:37,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 15:40:37,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-20 15:40:37,246 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 196 flow [2024-06-20 15:40:37,246 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 15:40:37,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:37,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:40:37,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:37,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:37,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1159347704, now seen corresponding path program 1 times [2024-06-20 15:40:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:37,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516225564] [2024-06-20 15:40:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:38,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:38,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516225564] [2024-06-20 15:40:38,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516225564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:38,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:38,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853026247] [2024-06-20 15:40:38,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:38,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:38,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:38,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:40:38,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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 15:40:38,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:38,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:40:38,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:38,938 INFO L124 PetriNetUnfolderBase]: 1763/2718 cut-off events. [2024-06-20 15:40:38,938 INFO L125 PetriNetUnfolderBase]: For 4298/4298 co-relation queries the response was YES. [2024-06-20 15:40:38,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7977 conditions, 2718 events. 1763/2718 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13851 event pairs, 617 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 7960. Up to 2517 conditions per place. [2024-06-20 15:40:38,952 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-20 15:40:38,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 450 flow [2024-06-20 15:40:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:40:38,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-20 15:40:38,954 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 196 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:40:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 450 flow [2024-06-20 15:40:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 430 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:38,956 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 243 flow [2024-06-20 15:40:38,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-20 15:40:38,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-20 15:40:38,957 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 243 flow [2024-06-20 15:40:38,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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 15:40:38,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:38,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:40:38,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:38,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 19203124, now seen corresponding path program 1 times [2024-06-20 15:40:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:38,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533730585] [2024-06-20 15:40:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:39,672 INFO 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 15:40:39,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533730585] [2024-06-20 15:40:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533730585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:39,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:39,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:39,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332539242] [2024-06-20 15:40:39,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:39,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:39,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:40:39,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 243 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 15:40:39,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:39,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:40:39,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:40,322 INFO L124 PetriNetUnfolderBase]: 1517/2438 cut-off events. [2024-06-20 15:40:40,322 INFO L125 PetriNetUnfolderBase]: For 5121/5121 co-relation queries the response was YES. [2024-06-20 15:40:40,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 2438 events. 1517/2438 cut-off events. For 5121/5121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12847 event pairs, 653 based on Foata normal form. 4/2432 useless extension candidates. Maximal degree in co-relation 7607. Up to 2235 conditions per place. [2024-06-20 15:40:40,340 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-20 15:40:40,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 425 flow [2024-06-20 15:40:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-20 15:40:40,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-20 15:40:40,341 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 243 flow. Second operand 6 states and 125 transitions. [2024-06-20 15:40:40,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 425 flow [2024-06-20 15:40:40,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 386 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:40,346 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-20 15:40:40,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-20 15:40:40,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-20 15:40:40,348 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-20 15:40:40,348 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 15:40:40,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:40,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:40:40,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:40,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash -408779306, now seen corresponding path program 1 times [2024-06-20 15:40:40,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:40,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863273791] [2024-06-20 15:40:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:40,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:41,078 INFO 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 15:40:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863273791] [2024-06-20 15:40:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863273791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:41,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:41,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:41,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150567356] [2024-06-20 15:40:41,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:41,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:41,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:41,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:41,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:41,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:41,711 INFO L124 PetriNetUnfolderBase]: 1880/2837 cut-off events. [2024-06-20 15:40:41,712 INFO L125 PetriNetUnfolderBase]: For 8266/8272 co-relation queries the response was YES. [2024-06-20 15:40:41,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 2837 events. 1880/2837 cut-off events. For 8266/8272 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13942 event pairs, 777 based on Foata normal form. 6/2841 useless extension candidates. Maximal degree in co-relation 9580. Up to 2734 conditions per place. [2024-06-20 15:40:41,733 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-20 15:40:41,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 526 flow [2024-06-20 15:40:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 15:40:41,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-20 15:40:41,735 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 121 transitions. [2024-06-20 15:40:41,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 526 flow [2024-06-20 15:40:41,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 494 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:41,739 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-20 15:40:41,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-20 15:40:41,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-20 15:40:41,741 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-20 15:40:41,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:41,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:41,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:41,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:40:41,741 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:41,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:41,742 INFO L85 PathProgramCache]: Analyzing trace with hash 628357624, now seen corresponding path program 2 times [2024-06-20 15:40:41,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:41,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447026763] [2024-06-20 15:40:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:41,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:42,446 INFO 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 15:40:42,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447026763] [2024-06-20 15:40:42,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447026763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:42,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:42,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179595347] [2024-06-20 15:40:42,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:42,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:42,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:42,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:42,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:42,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:42,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:43,071 INFO L124 PetriNetUnfolderBase]: 1875/2831 cut-off events. [2024-06-20 15:40:43,072 INFO L125 PetriNetUnfolderBase]: For 10712/10725 co-relation queries the response was YES. [2024-06-20 15:40:43,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 2831 events. 1875/2831 cut-off events. For 10712/10725 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13937 event pairs, 780 based on Foata normal form. 12/2841 useless extension candidates. Maximal degree in co-relation 10155. Up to 2729 conditions per place. [2024-06-20 15:40:43,087 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-20 15:40:43,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 494 flow [2024-06-20 15:40:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 15:40:43,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:40:43,089 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 6 states and 116 transitions. [2024-06-20 15:40:43,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 494 flow [2024-06-20 15:40:43,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 458 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:43,099 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 322 flow [2024-06-20 15:40:43,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-20 15:40:43,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-20 15:40:43,102 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 322 flow [2024-06-20 15:40:43,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:43,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:43,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:43,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:40:43,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:43,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1745515442, now seen corresponding path program 1 times [2024-06-20 15:40:43,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:43,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030792940] [2024-06-20 15:40:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:43,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030792940] [2024-06-20 15:40:43,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030792940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:43,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:43,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354569445] [2024-06-20 15:40:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:43,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:43,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:43,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:43,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:43,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:43,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:44,566 INFO L124 PetriNetUnfolderBase]: 1972/2980 cut-off events. [2024-06-20 15:40:44,567 INFO L125 PetriNetUnfolderBase]: For 13141/13151 co-relation queries the response was YES. [2024-06-20 15:40:44,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11100 conditions, 2980 events. 1972/2980 cut-off events. For 13141/13151 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14660 event pairs, 755 based on Foata normal form. 10/2988 useless extension candidates. Maximal degree in co-relation 11076. Up to 2769 conditions per place. [2024-06-20 15:40:44,582 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 74 selfloop transitions, 41 changer transitions 0/120 dead transitions. [2024-06-20 15:40:44,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 120 transitions, 942 flow [2024-06-20 15:40:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 15:40:44,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-20 15:40:44,583 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 322 flow. Second operand 8 states and 165 transitions. [2024-06-20 15:40:44,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 120 transitions, 942 flow [2024-06-20 15:40:44,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 877 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:44,589 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 604 flow [2024-06-20 15:40:44,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=604, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2024-06-20 15:40:44,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-20 15:40:44,591 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 604 flow [2024-06-20 15:40:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:44,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:44,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:40:44,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:44,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash 212595122, now seen corresponding path program 2 times [2024-06-20 15:40:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:44,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436266669] [2024-06-20 15:40:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436266669] [2024-06-20 15:40:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436266669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:45,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393270536] [2024-06-20 15:40:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:45,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:45,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:45,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:45,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:45,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:45,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:46,145 INFO L124 PetriNetUnfolderBase]: 1988/3002 cut-off events. [2024-06-20 15:40:46,145 INFO L125 PetriNetUnfolderBase]: For 16689/16703 co-relation queries the response was YES. [2024-06-20 15:40:46,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12115 conditions, 3002 events. 1988/3002 cut-off events. For 16689/16703 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14773 event pairs, 760 based on Foata normal form. 16/3016 useless extension candidates. Maximal degree in co-relation 12087. Up to 2787 conditions per place. [2024-06-20 15:40:46,161 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 49 changer transitions 0/120 dead transitions. [2024-06-20 15:40:46,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 1032 flow [2024-06-20 15:40:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 15:40:46,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-20 15:40:46,163 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 604 flow. Second operand 7 states and 142 transitions. [2024-06-20 15:40:46,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 1032 flow [2024-06-20 15:40:46,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 998 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:46,174 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 753 flow [2024-06-20 15:40:46,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2024-06-20 15:40:46,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-20 15:40:46,175 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 753 flow [2024-06-20 15:40:46,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:46,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:46,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:46,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:40:46,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:46,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash 212745069, now seen corresponding path program 1 times [2024-06-20 15:40:46,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:46,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389471011] [2024-06-20 15:40:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:46,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:46,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389471011] [2024-06-20 15:40:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389471011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:46,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:46,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343396579] [2024-06-20 15:40:46,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:46,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:46,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:47,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:47,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:47,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:47,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:47,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:47,688 INFO L124 PetriNetUnfolderBase]: 2010/3039 cut-off events. [2024-06-20 15:40:47,689 INFO L125 PetriNetUnfolderBase]: For 19411/19419 co-relation queries the response was YES. [2024-06-20 15:40:47,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12587 conditions, 3039 events. 2010/3039 cut-off events. For 19411/19419 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14922 event pairs, 710 based on Foata normal form. 12/3046 useless extension candidates. Maximal degree in co-relation 12557. Up to 2832 conditions per place. [2024-06-20 15:40:47,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 30 changer transitions 0/127 dead transitions. [2024-06-20 15:40:47,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 1185 flow [2024-06-20 15:40:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 15:40:47,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-20 15:40:47,706 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 753 flow. Second operand 7 states and 143 transitions. [2024-06-20 15:40:47,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 1185 flow [2024-06-20 15:40:47,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:47,718 INFO L231 Difference]: Finished difference. Result has 77 places, 98 transitions, 764 flow [2024-06-20 15:40:47,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=77, PETRI_TRANSITIONS=98} [2024-06-20 15:40:47,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-20 15:40:47,719 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 98 transitions, 764 flow [2024-06-20 15:40:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:47,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:47,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:40:47,720 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:47,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 297779230, now seen corresponding path program 3 times [2024-06-20 15:40:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209733030] [2024-06-20 15:40:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:48,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:48,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209733030] [2024-06-20 15:40:48,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209733030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:48,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:48,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:48,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303961990] [2024-06-20 15:40:48,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:48,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:48,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:48,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:48,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:48,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:48,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:48,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:49,248 INFO L124 PetriNetUnfolderBase]: 2033/3073 cut-off events. [2024-06-20 15:40:49,248 INFO L125 PetriNetUnfolderBase]: For 20435/20438 co-relation queries the response was YES. [2024-06-20 15:40:49,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13006 conditions, 3073 events. 2033/3073 cut-off events. For 20435/20438 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15146 event pairs, 740 based on Foata normal form. 7/3078 useless extension candidates. Maximal degree in co-relation 12976. Up to 2845 conditions per place. [2024-06-20 15:40:49,264 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 55 changer transitions 0/132 dead transitions. [2024-06-20 15:40:49,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 132 transitions, 1240 flow [2024-06-20 15:40:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 15:40:49,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:40:49,266 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 764 flow. Second operand 7 states and 140 transitions. [2024-06-20 15:40:49,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 132 transitions, 1240 flow [2024-06-20 15:40:49,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 1201 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:49,279 INFO L231 Difference]: Finished difference. Result has 81 places, 107 transitions, 952 flow [2024-06-20 15:40:49,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=952, PETRI_PLACES=81, PETRI_TRANSITIONS=107} [2024-06-20 15:40:49,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-20 15:40:49,280 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 107 transitions, 952 flow [2024-06-20 15:40:49,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:49,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:49,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:49,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:40:49,280 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:49,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1995748686, now seen corresponding path program 4 times [2024-06-20 15:40:49,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:49,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306174477] [2024-06-20 15:40:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:50,066 INFO 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 15:40:50,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:50,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306174477] [2024-06-20 15:40:50,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306174477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:50,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:50,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562932760] [2024-06-20 15:40:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:50,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:50,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:50,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:50,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:50,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 107 transitions, 952 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:50,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:50,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:50,785 INFO L124 PetriNetUnfolderBase]: 2022/3061 cut-off events. [2024-06-20 15:40:50,785 INFO L125 PetriNetUnfolderBase]: For 23406/23411 co-relation queries the response was YES. [2024-06-20 15:40:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 3061 events. 2022/3061 cut-off events. For 23406/23411 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15031 event pairs, 744 based on Foata normal form. 8/3063 useless extension candidates. Maximal degree in co-relation 13301. Up to 2834 conditions per place. [2024-06-20 15:40:50,803 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 55 changer transitions 0/127 dead transitions. [2024-06-20 15:40:50,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 1264 flow [2024-06-20 15:40:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 15:40:50,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-20 15:40:50,804 INFO L175 Difference]: Start difference. First operand has 81 places, 107 transitions, 952 flow. Second operand 7 states and 135 transitions. [2024-06-20 15:40:50,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 1264 flow [2024-06-20 15:40:50,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1107 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:50,847 INFO L231 Difference]: Finished difference. Result has 84 places, 107 transitions, 920 flow [2024-06-20 15:40:50,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=84, PETRI_TRANSITIONS=107} [2024-06-20 15:40:50,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-20 15:40:50,847 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 107 transitions, 920 flow [2024-06-20 15:40:50,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:50,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:50,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:40:50,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:50,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1274110517, now seen corresponding path program 2 times [2024-06-20 15:40:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:50,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037546657] [2024-06-20 15:40:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:50,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:51,592 INFO 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 15:40:51,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:51,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037546657] [2024-06-20 15:40:51,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037546657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:51,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:51,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267827664] [2024-06-20 15:40:51,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:51,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:51,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 107 transitions, 920 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:51,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:51,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:51,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:52,319 INFO L124 PetriNetUnfolderBase]: 2044/3092 cut-off events. [2024-06-20 15:40:52,319 INFO L125 PetriNetUnfolderBase]: For 26515/26528 co-relation queries the response was YES. [2024-06-20 15:40:52,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13688 conditions, 3092 events. 2044/3092 cut-off events. For 26515/26528 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15184 event pairs, 701 based on Foata normal form. 14/3103 useless extension candidates. Maximal degree in co-relation 13655. Up to 2869 conditions per place. [2024-06-20 15:40:52,338 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-20 15:40:52,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1360 flow [2024-06-20 15:40:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 15:40:52,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:40:52,339 INFO L175 Difference]: Start difference. First operand has 84 places, 107 transitions, 920 flow. Second operand 7 states and 140 transitions. [2024-06-20 15:40:52,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1360 flow [2024-06-20 15:40:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 138 transitions, 1181 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:40:52,355 INFO L231 Difference]: Finished difference. Result has 83 places, 110 transitions, 850 flow [2024-06-20 15:40:52,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=83, PETRI_TRANSITIONS=110} [2024-06-20 15:40:52,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-20 15:40:52,356 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 110 transitions, 850 flow [2024-06-20 15:40:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:52,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:52,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:52,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:40:52,357 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:52,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:52,357 INFO L85 PathProgramCache]: Analyzing trace with hash 218316699, now seen corresponding path program 3 times [2024-06-20 15:40:52,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:52,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942222322] [2024-06-20 15:40:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:53,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942222322] [2024-06-20 15:40:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942222322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:53,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:53,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:53,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160425748] [2024-06-20 15:40:53,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:53,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:53,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:53,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:53,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:53,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:53,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 110 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:53,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:53,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:53,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:53,765 INFO L124 PetriNetUnfolderBase]: 2034/3077 cut-off events. [2024-06-20 15:40:53,765 INFO L125 PetriNetUnfolderBase]: For 28960/28973 co-relation queries the response was YES. [2024-06-20 15:40:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 3077 events. 2034/3077 cut-off events. For 28960/28973 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15082 event pairs, 701 based on Foata normal form. 14/3088 useless extension candidates. Maximal degree in co-relation 13678. Up to 2861 conditions per place. [2024-06-20 15:40:53,791 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 94 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-06-20 15:40:53,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 134 transitions, 1188 flow [2024-06-20 15:40:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 15:40:53,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-20 15:40:53,792 INFO L175 Difference]: Start difference. First operand has 83 places, 110 transitions, 850 flow. Second operand 7 states and 136 transitions. [2024-06-20 15:40:53,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 134 transitions, 1188 flow [2024-06-20 15:40:53,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 1082 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:53,815 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 822 flow [2024-06-20 15:40:53,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2024-06-20 15:40:53,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-20 15:40:53,817 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 822 flow [2024-06-20 15:40:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:53,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:53,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:40:53,817 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:53,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash -685239082, now seen corresponding path program 1 times [2024-06-20 15:40:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:53,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496276473] [2024-06-20 15:40:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:54,618 INFO 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 15:40:54,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:54,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496276473] [2024-06-20 15:40:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496276473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:40:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211397871] [2024-06-20 15:40:54,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:40:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:40:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:40:54,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:40:54,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 822 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:54,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:54,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:40:54,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:55,065 INFO L124 PetriNetUnfolderBase]: 1432/2444 cut-off events. [2024-06-20 15:40:55,065 INFO L125 PetriNetUnfolderBase]: For 26303/26321 co-relation queries the response was YES. [2024-06-20 15:40:55,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2444 events. 1432/2444 cut-off events. For 26303/26321 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13787 event pairs, 585 based on Foata normal form. 19/2462 useless extension candidates. Maximal degree in co-relation 10689. Up to 2059 conditions per place. [2024-06-20 15:40:55,076 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 69 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2024-06-20 15:40:55,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1020 flow [2024-06-20 15:40:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-20 15:40:55,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-06-20 15:40:55,077 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 822 flow. Second operand 5 states and 109 transitions. [2024-06-20 15:40:55,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1020 flow [2024-06-20 15:40:55,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 937 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:40:55,093 INFO L231 Difference]: Finished difference. Result has 84 places, 113 transitions, 787 flow [2024-06-20 15:40:55,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=787, PETRI_PLACES=84, PETRI_TRANSITIONS=113} [2024-06-20 15:40:55,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-20 15:40:55,093 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 113 transitions, 787 flow [2024-06-20 15:40:55,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:55,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:55,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:55,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:40:55,094 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:55,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:55,094 INFO L85 PathProgramCache]: Analyzing trace with hash -247806069, now seen corresponding path program 1 times [2024-06-20 15:40:55,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:55,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132745094] [2024-06-20 15:40:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:55,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:55,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:55,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132745094] [2024-06-20 15:40:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132745094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:55,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:55,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:55,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045798691] [2024-06-20 15:40:55,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:55,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:55,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:56,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:56,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 113 transitions, 787 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:40:56,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:56,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:56,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:56,877 INFO L124 PetriNetUnfolderBase]: 2042/3089 cut-off events. [2024-06-20 15:40:56,877 INFO L125 PetriNetUnfolderBase]: For 34752/34756 co-relation queries the response was YES. [2024-06-20 15:40:56,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14361 conditions, 3089 events. 2042/3089 cut-off events. For 34752/34756 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15189 event pairs, 707 based on Foata normal form. 6/3094 useless extension candidates. Maximal degree in co-relation 14326. Up to 2929 conditions per place. [2024-06-20 15:40:56,892 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2024-06-20 15:40:56,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1217 flow [2024-06-20 15:40:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:40:56,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:40:56,895 INFO L175 Difference]: Start difference. First operand has 84 places, 113 transitions, 787 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:40:56,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1217 flow [2024-06-20 15:40:56,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1191 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:56,915 INFO L231 Difference]: Finished difference. Result has 89 places, 116 transitions, 855 flow [2024-06-20 15:40:56,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=89, PETRI_TRANSITIONS=116} [2024-06-20 15:40:56,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-20 15:40:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 116 transitions, 855 flow [2024-06-20 15:40:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:40:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:56,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:40:56,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:56,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash 636581575, now seen corresponding path program 1 times [2024-06-20 15:40:56,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:56,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982435623] [2024-06-20 15:40:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:57,788 INFO 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 15:40:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982435623] [2024-06-20 15:40:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982435623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253059922] [2024-06-20 15:40:57,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:57,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:57,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 116 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:40:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:58,590 INFO L124 PetriNetUnfolderBase]: 2064/3122 cut-off events. [2024-06-20 15:40:58,590 INFO L125 PetriNetUnfolderBase]: For 39985/39989 co-relation queries the response was YES. [2024-06-20 15:40:58,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15185 conditions, 3122 events. 2064/3122 cut-off events. For 39985/39989 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15331 event pairs, 640 based on Foata normal form. 8/3125 useless extension candidates. Maximal degree in co-relation 15149. Up to 2710 conditions per place. [2024-06-20 15:40:58,606 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2024-06-20 15:40:58,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 158 transitions, 1399 flow [2024-06-20 15:40:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 15:40:58,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-20 15:40:58,607 INFO L175 Difference]: Start difference. First operand has 89 places, 116 transitions, 855 flow. Second operand 8 states and 166 transitions. [2024-06-20 15:40:58,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 158 transitions, 1399 flow [2024-06-20 15:40:58,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1329 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:40:58,632 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 995 flow [2024-06-20 15:40:58,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=995, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-20 15:40:58,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-20 15:40:58,633 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 995 flow [2024-06-20 15:40:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:40:58,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:58,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:40:58,634 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:58,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1999484329, now seen corresponding path program 2 times [2024-06-20 15:40:58,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:58,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557005835] [2024-06-20 15:40:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:59,526 INFO 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 15:40:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557005835] [2024-06-20 15:40:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557005835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:59,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495276997] [2024-06-20 15:40:59,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:59,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:59,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:59,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:59,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:59,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:59,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 995 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:40:59,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:59,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:59,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:00,329 INFO L124 PetriNetUnfolderBase]: 2075/3145 cut-off events. [2024-06-20 15:41:00,329 INFO L125 PetriNetUnfolderBase]: For 45328/45335 co-relation queries the response was YES. [2024-06-20 15:41:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 3145 events. 2075/3145 cut-off events. For 45328/45335 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15572 event pairs, 691 based on Foata normal form. 8/3151 useless extension candidates. Maximal degree in co-relation 15989. Up to 2827 conditions per place. [2024-06-20 15:41:00,342 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-20 15:41:00,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 161 transitions, 1561 flow [2024-06-20 15:41:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 15:41:00,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-20 15:41:00,343 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 995 flow. Second operand 8 states and 161 transitions. [2024-06-20 15:41:00,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 161 transitions, 1561 flow [2024-06-20 15:41:00,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 161 transitions, 1484 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:00,367 INFO L231 Difference]: Finished difference. Result has 95 places, 128 transitions, 1136 flow [2024-06-20 15:41:00,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=95, PETRI_TRANSITIONS=128} [2024-06-20 15:41:00,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-20 15:41:00,367 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 128 transitions, 1136 flow [2024-06-20 15:41:00,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:00,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:00,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:00,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:41:00,368 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:00,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1994842699, now seen corresponding path program 3 times [2024-06-20 15:41:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:00,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899568608] [2024-06-20 15:41:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:01,198 INFO 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 15:41:01,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:01,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899568608] [2024-06-20 15:41:01,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899568608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:01,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:01,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:01,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332651061] [2024-06-20 15:41:01,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:01,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:01,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:01,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:01,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 128 transitions, 1136 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:01,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:02,017 INFO L124 PetriNetUnfolderBase]: 2086/3166 cut-off events. [2024-06-20 15:41:02,017 INFO L125 PetriNetUnfolderBase]: For 51298/51301 co-relation queries the response was YES. [2024-06-20 15:41:02,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16839 conditions, 3166 events. 2086/3166 cut-off events. For 51298/51301 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15706 event pairs, 698 based on Foata normal form. 4/3168 useless extension candidates. Maximal degree in co-relation 16800. Up to 2839 conditions per place. [2024-06-20 15:41:02,033 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-20 15:41:02,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 161 transitions, 1660 flow [2024-06-20 15:41:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 15:41:02,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-20 15:41:02,035 INFO L175 Difference]: Start difference. First operand has 95 places, 128 transitions, 1136 flow. Second operand 8 states and 159 transitions. [2024-06-20 15:41:02,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 161 transitions, 1660 flow [2024-06-20 15:41:02,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 161 transitions, 1573 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:02,069 INFO L231 Difference]: Finished difference. Result has 99 places, 131 transitions, 1227 flow [2024-06-20 15:41:02,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1227, PETRI_PLACES=99, PETRI_TRANSITIONS=131} [2024-06-20 15:41:02,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-20 15:41:02,070 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 131 transitions, 1227 flow [2024-06-20 15:41:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:02,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:02,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:41:02,070 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:02,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1994836003, now seen corresponding path program 2 times [2024-06-20 15:41:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:02,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419068354] [2024-06-20 15:41:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:02,887 INFO 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 15:41:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:02,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419068354] [2024-06-20 15:41:02,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419068354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:02,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046032469] [2024-06-20 15:41:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:02,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:02,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 1227 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:02,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:02,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:02,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:03,742 INFO L124 PetriNetUnfolderBase]: 2140/3244 cut-off events. [2024-06-20 15:41:03,742 INFO L125 PetriNetUnfolderBase]: For 57393/57393 co-relation queries the response was YES. [2024-06-20 15:41:03,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17642 conditions, 3244 events. 2140/3244 cut-off events. For 57393/57393 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16138 event pairs, 642 based on Foata normal form. 4/3243 useless extension candidates. Maximal degree in co-relation 17601. Up to 2788 conditions per place. [2024-06-20 15:41:03,760 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 69 changer transitions 0/171 dead transitions. [2024-06-20 15:41:03,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 171 transitions, 1869 flow [2024-06-20 15:41:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 15:41:03,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-20 15:41:03,762 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 1227 flow. Second operand 8 states and 166 transitions. [2024-06-20 15:41:03,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 171 transitions, 1869 flow [2024-06-20 15:41:03,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1751 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:03,793 INFO L231 Difference]: Finished difference. Result has 102 places, 137 transitions, 1319 flow [2024-06-20 15:41:03,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=102, PETRI_TRANSITIONS=137} [2024-06-20 15:41:03,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-20 15:41:03,793 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 137 transitions, 1319 flow [2024-06-20 15:41:03,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:03,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:03,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:03,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:41:03,794 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:03,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash 641223205, now seen corresponding path program 3 times [2024-06-20 15:41:03,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:03,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464990578] [2024-06-20 15:41:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:03,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:04,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:04,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464990578] [2024-06-20 15:41:04,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464990578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:04,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:04,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496389783] [2024-06-20 15:41:04,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:04,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:04,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:04,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 137 transitions, 1319 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:04,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:04,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:04,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:05,438 INFO L124 PetriNetUnfolderBase]: 2130/3235 cut-off events. [2024-06-20 15:41:05,438 INFO L125 PetriNetUnfolderBase]: For 62244/62244 co-relation queries the response was YES. [2024-06-20 15:41:05,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17863 conditions, 3235 events. 2130/3235 cut-off events. For 62244/62244 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16136 event pairs, 642 based on Foata normal form. 4/3234 useless extension candidates. Maximal degree in co-relation 17821. Up to 2780 conditions per place. [2024-06-20 15:41:05,459 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 66 changer transitions 0/171 dead transitions. [2024-06-20 15:41:05,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 171 transitions, 1831 flow [2024-06-20 15:41:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 15:41:05,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-20 15:41:05,460 INFO L175 Difference]: Start difference. First operand has 102 places, 137 transitions, 1319 flow. Second operand 8 states and 166 transitions. [2024-06-20 15:41:05,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 171 transitions, 1831 flow [2024-06-20 15:41:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 171 transitions, 1703 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:05,501 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1333 flow [2024-06-20 15:41:05,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-20 15:41:05,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-20 15:41:05,502 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1333 flow [2024-06-20 15:41:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:05,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:41:05,503 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1738665641, now seen corresponding path program 4 times [2024-06-20 15:41:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65438245] [2024-06-20 15:41:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:06,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:06,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65438245] [2024-06-20 15:41:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65438245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:06,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:06,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:06,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820712690] [2024-06-20 15:41:06,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:06,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:06,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:06,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:06,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1333 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:06,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:06,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:06,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:07,128 INFO L124 PetriNetUnfolderBase]: 2125/3227 cut-off events. [2024-06-20 15:41:07,129 INFO L125 PetriNetUnfolderBase]: For 67055/67055 co-relation queries the response was YES. [2024-06-20 15:41:07,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18026 conditions, 3227 events. 2125/3227 cut-off events. For 67055/67055 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16021 event pairs, 714 based on Foata normal form. 2/3221 useless extension candidates. Maximal degree in co-relation 17983. Up to 2898 conditions per place. [2024-06-20 15:41:07,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-20 15:41:07,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1725 flow [2024-06-20 15:41:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:41:07,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-20 15:41:07,148 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1333 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:41:07,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1725 flow [2024-06-20 15:41:07,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1564 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:07,181 INFO L231 Difference]: Finished difference. Result has 107 places, 137 transitions, 1304 flow [2024-06-20 15:41:07,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1304, PETRI_PLACES=107, PETRI_TRANSITIONS=137} [2024-06-20 15:41:07,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-20 15:41:07,181 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 137 transitions, 1304 flow [2024-06-20 15:41:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:07,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:07,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:07,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:41:07,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:07,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash 124727551, now seen corresponding path program 4 times [2024-06-20 15:41:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:07,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613277479] [2024-06-20 15:41:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:07,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:07,998 INFO 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 15:41:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613277479] [2024-06-20 15:41:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613277479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:07,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:07,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635574266] [2024-06-20 15:41:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:08,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:08,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 137 transitions, 1304 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:08,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:08,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:08,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:08,921 INFO L124 PetriNetUnfolderBase]: 2147/3261 cut-off events. [2024-06-20 15:41:08,921 INFO L125 PetriNetUnfolderBase]: For 72846/72851 co-relation queries the response was YES. [2024-06-20 15:41:08,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18303 conditions, 3261 events. 2147/3261 cut-off events. For 72846/72851 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16230 event pairs, 645 based on Foata normal form. 8/3263 useless extension candidates. Maximal degree in co-relation 18259. Up to 2792 conditions per place. [2024-06-20 15:41:08,940 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 77 changer transitions 0/169 dead transitions. [2024-06-20 15:41:08,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 169 transitions, 1839 flow [2024-06-20 15:41:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 15:41:08,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-20 15:41:08,941 INFO L175 Difference]: Start difference. First operand has 107 places, 137 transitions, 1304 flow. Second operand 8 states and 159 transitions. [2024-06-20 15:41:08,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 169 transitions, 1839 flow [2024-06-20 15:41:08,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 169 transitions, 1655 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:41:08,979 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1317 flow [2024-06-20 15:41:08,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-06-20 15:41:08,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-20 15:41:08,980 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1317 flow [2024-06-20 15:41:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:08,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:08,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:41:08,980 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 116446831, now seen corresponding path program 5 times [2024-06-20 15:41:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944418349] [2024-06-20 15:41:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:09,793 INFO 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 15:41:09,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:09,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944418349] [2024-06-20 15:41:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944418349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:09,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699740690] [2024-06-20 15:41:09,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:09,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:09,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:09,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:09,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:09,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:10,635 INFO L124 PetriNetUnfolderBase]: 2169/3293 cut-off events. [2024-06-20 15:41:10,636 INFO L125 PetriNetUnfolderBase]: For 78555/78560 co-relation queries the response was YES. [2024-06-20 15:41:10,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18818 conditions, 3293 events. 2169/3293 cut-off events. For 78555/78560 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16414 event pairs, 641 based on Foata normal form. 8/3295 useless extension candidates. Maximal degree in co-relation 18773. Up to 2811 conditions per place. [2024-06-20 15:41:10,655 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 73 changer transitions 0/175 dead transitions. [2024-06-20 15:41:10,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 175 transitions, 1888 flow [2024-06-20 15:41:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 15:41:10,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-20 15:41:10,657 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1317 flow. Second operand 8 states and 161 transitions. [2024-06-20 15:41:10,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 175 transitions, 1888 flow [2024-06-20 15:41:10,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 1740 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:10,706 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1366 flow [2024-06-20 15:41:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-20 15:41:10,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-20 15:41:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1366 flow [2024-06-20 15:41:10,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:10,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:10,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:41:10,707 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:10,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash 116453341, now seen corresponding path program 6 times [2024-06-20 15:41:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614228773] [2024-06-20 15:41:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:11,534 INFO 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 15:41:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614228773] [2024-06-20 15:41:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614228773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:11,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5860458] [2024-06-20 15:41:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:11,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:11,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:11,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:11,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:11,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:11,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:12,364 INFO L124 PetriNetUnfolderBase]: 2159/3279 cut-off events. [2024-06-20 15:41:12,364 INFO L125 PetriNetUnfolderBase]: For 83446/83451 co-relation queries the response was YES. [2024-06-20 15:41:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18906 conditions, 3279 events. 2159/3279 cut-off events. For 83446/83451 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16295 event pairs, 643 based on Foata normal form. 8/3281 useless extension candidates. Maximal degree in co-relation 18860. Up to 2803 conditions per place. [2024-06-20 15:41:12,384 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 72 changer transitions 0/172 dead transitions. [2024-06-20 15:41:12,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 172 transitions, 1790 flow [2024-06-20 15:41:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 15:41:12,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:41:12,386 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1366 flow. Second operand 8 states and 160 transitions. [2024-06-20 15:41:12,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 172 transitions, 1790 flow [2024-06-20 15:41:12,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1558 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:12,437 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1286 flow [2024-06-20 15:41:12,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1286, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-20 15:41:12,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-20 15:41:12,437 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1286 flow [2024-06-20 15:41:12,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 15:41:12,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:12,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:12,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:41:12,438 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:12,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:12,438 INFO L85 PathProgramCache]: Analyzing trace with hash 125035381, now seen corresponding path program 1 times [2024-06-20 15:41:12,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:12,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785304824] [2024-06-20 15:41:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:12,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785304824] [2024-06-20 15:41:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785304824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:13,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363945950] [2024-06-20 15:41:13,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:13,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:13,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1286 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 15:41:13,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:13,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:13,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:14,309 INFO L124 PetriNetUnfolderBase]: 1767/2844 cut-off events. [2024-06-20 15:41:14,309 INFO L125 PetriNetUnfolderBase]: For 75947/75972 co-relation queries the response was YES. [2024-06-20 15:41:14,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16197 conditions, 2844 events. 1767/2844 cut-off events. For 75947/75972 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15163 event pairs, 548 based on Foata normal form. 29/2851 useless extension candidates. Maximal degree in co-relation 16150. Up to 2543 conditions per place. [2024-06-20 15:41:14,329 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 16 changer transitions 0/172 dead transitions. [2024-06-20 15:41:14,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 1726 flow [2024-06-20 15:41:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 15:41:14,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-20 15:41:14,331 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1286 flow. Second operand 8 states and 162 transitions. [2024-06-20 15:41:14,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 1726 flow [2024-06-20 15:41:14,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1525 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:41:14,400 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1190 flow [2024-06-20 15:41:14,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1190, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2024-06-20 15:41:14,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-20 15:41:14,400 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1190 flow [2024-06-20 15:41:14,400 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 15:41:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:14,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:14,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:41:14,401 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:14,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 232426522, now seen corresponding path program 1 times [2024-06-20 15:41:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533722681] [2024-06-20 15:41:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:15,466 INFO 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 15:41:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533722681] [2024-06-20 15:41:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533722681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:15,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064932181] [2024-06-20 15:41:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:15,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:41:15,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 148 transitions, 1190 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:15,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:15,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:41:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:15,972 INFO L124 PetriNetUnfolderBase]: 1499/2575 cut-off events. [2024-06-20 15:41:15,972 INFO L125 PetriNetUnfolderBase]: For 78313/78331 co-relation queries the response was YES. [2024-06-20 15:41:15,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14851 conditions, 2575 events. 1499/2575 cut-off events. For 78313/78331 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14753 event pairs, 533 based on Foata normal form. 19/2589 useless extension candidates. Maximal degree in co-relation 14802. Up to 2119 conditions per place. [2024-06-20 15:41:15,986 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 95 selfloop transitions, 11 changer transitions 0/160 dead transitions. [2024-06-20 15:41:15,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 160 transitions, 1454 flow [2024-06-20 15:41:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-20 15:41:15,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2024-06-20 15:41:15,987 INFO L175 Difference]: Start difference. First operand has 112 places, 148 transitions, 1190 flow. Second operand 6 states and 127 transitions. [2024-06-20 15:41:15,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 160 transitions, 1454 flow [2024-06-20 15:41:16,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 160 transitions, 1395 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:16,036 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1191 flow [2024-06-20 15:41:16,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-06-20 15:41:16,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-20 15:41:16,041 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1191 flow [2024-06-20 15:41:16,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:16,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:16,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:16,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:41:16,041 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:16,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash 907948120, now seen corresponding path program 1 times [2024-06-20 15:41:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:16,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472382284] [2024-06-20 15:41:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:16,987 INFO 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 15:41:16,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472382284] [2024-06-20 15:41:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472382284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:16,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:16,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:16,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748207831] [2024-06-20 15:41:16,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:16,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:16,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:17,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:17,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1191 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:17,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:17,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:17,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:17,840 INFO L124 PetriNetUnfolderBase]: 2167/3299 cut-off events. [2024-06-20 15:41:17,840 INFO L125 PetriNetUnfolderBase]: For 99756/99760 co-relation queries the response was YES. [2024-06-20 15:41:17,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19696 conditions, 3299 events. 2167/3299 cut-off events. For 99756/99760 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16487 event pairs, 657 based on Foata normal form. 8/3306 useless extension candidates. Maximal degree in co-relation 19646. Up to 3094 conditions per place. [2024-06-20 15:41:17,859 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2024-06-20 15:41:17,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 1735 flow [2024-06-20 15:41:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:41:17,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-20 15:41:17,860 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1191 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:41:17,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 1735 flow [2024-06-20 15:41:17,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 1697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:17,912 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1265 flow [2024-06-20 15:41:17,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1265, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-20 15:41:17,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-20 15:41:17,913 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1265 flow [2024-06-20 15:41:17,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:17,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:17,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:41:17,914 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:17,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash 908097850, now seen corresponding path program 2 times [2024-06-20 15:41:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:17,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464729157] [2024-06-20 15:41:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:18,835 INFO 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 15:41:18,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:18,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464729157] [2024-06-20 15:41:18,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464729157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:18,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:18,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678393876] [2024-06-20 15:41:18,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:18,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:18,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:18,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1265 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:18,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:18,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:18,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:19,835 INFO L124 PetriNetUnfolderBase]: 2221/3388 cut-off events. [2024-06-20 15:41:19,836 INFO L125 PetriNetUnfolderBase]: For 109745/109752 co-relation queries the response was YES. [2024-06-20 15:41:19,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20928 conditions, 3388 events. 2221/3388 cut-off events. For 109745/109752 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17009 event pairs, 594 based on Foata normal form. 8/3392 useless extension candidates. Maximal degree in co-relation 20877. Up to 2662 conditions per place. [2024-06-20 15:41:19,858 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 87 changer transitions 0/206 dead transitions. [2024-06-20 15:41:19,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 206 transitions, 2173 flow [2024-06-20 15:41:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:41:19,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:41:19,859 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1265 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:41:19,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 206 transitions, 2173 flow [2024-06-20 15:41:19,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 206 transitions, 2085 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:19,922 INFO L231 Difference]: Finished difference. Result has 120 places, 163 transitions, 1515 flow [2024-06-20 15:41:19,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1515, PETRI_PLACES=120, PETRI_TRANSITIONS=163} [2024-06-20 15:41:19,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-20 15:41:19,922 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 163 transitions, 1515 flow [2024-06-20 15:41:19,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:19,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:19,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:19,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:41:19,923 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:19,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1854470388, now seen corresponding path program 3 times [2024-06-20 15:41:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882154098] [2024-06-20 15:41:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:20,830 INFO 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 15:41:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:20,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882154098] [2024-06-20 15:41:20,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882154098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:20,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:20,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:20,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738918507] [2024-06-20 15:41:20,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:20,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:20,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:20,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:20,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 163 transitions, 1515 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:20,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:20,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:20,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:21,762 INFO L124 PetriNetUnfolderBase]: 2211/3374 cut-off events. [2024-06-20 15:41:21,762 INFO L125 PetriNetUnfolderBase]: For 117457/117464 co-relation queries the response was YES. [2024-06-20 15:41:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21469 conditions, 3374 events. 2211/3374 cut-off events. For 117457/117464 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16920 event pairs, 592 based on Foata normal form. 8/3378 useless extension candidates. Maximal degree in co-relation 21417. Up to 2654 conditions per place. [2024-06-20 15:41:21,783 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 86 changer transitions 0/205 dead transitions. [2024-06-20 15:41:21,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 205 transitions, 2167 flow [2024-06-20 15:41:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:41:21,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:41:21,785 INFO L175 Difference]: Start difference. First operand has 120 places, 163 transitions, 1515 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:41:21,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 205 transitions, 2167 flow [2024-06-20 15:41:21,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 205 transitions, 2031 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:21,859 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1559 flow [2024-06-20 15:41:21,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1559, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-20 15:41:21,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-20 15:41:21,860 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1559 flow [2024-06-20 15:41:21,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:21,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:21,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:21,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:41:21,860 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:21,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1596921224, now seen corresponding path program 4 times [2024-06-20 15:41:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083192247] [2024-06-20 15:41:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:22,768 INFO 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 15:41:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083192247] [2024-06-20 15:41:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083192247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:22,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91782074] [2024-06-20 15:41:22,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:22,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:22,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:22,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1559 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:22,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:22,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:22,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:23,742 INFO L124 PetriNetUnfolderBase]: 2265/3472 cut-off events. [2024-06-20 15:41:23,742 INFO L125 PetriNetUnfolderBase]: For 126942/126945 co-relation queries the response was YES. [2024-06-20 15:41:23,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22520 conditions, 3472 events. 2265/3472 cut-off events. For 126942/126945 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17601 event pairs, 602 based on Foata normal form. 4/3472 useless extension candidates. Maximal degree in co-relation 22466. Up to 2700 conditions per place. [2024-06-20 15:41:23,766 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 88 changer transitions 0/210 dead transitions. [2024-06-20 15:41:23,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 210 transitions, 2445 flow [2024-06-20 15:41:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:41:23,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:41:23,767 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1559 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:41:23,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 210 transitions, 2445 flow [2024-06-20 15:41:23,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 210 transitions, 2241 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:41:23,843 INFO L231 Difference]: Finished difference. Result has 126 places, 169 transitions, 1651 flow [2024-06-20 15:41:23,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=126, PETRI_TRANSITIONS=169} [2024-06-20 15:41:23,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-20 15:41:23,844 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 169 transitions, 1651 flow [2024-06-20 15:41:23,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:23,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:23,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:41:23,844 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:23,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 913460230, now seen corresponding path program 5 times [2024-06-20 15:41:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937315785] [2024-06-20 15:41:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:24,764 INFO 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 15:41:24,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:24,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937315785] [2024-06-20 15:41:24,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937315785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:24,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:24,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:24,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685970107] [2024-06-20 15:41:24,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:24,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:24,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:24,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:24,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 169 transitions, 1651 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:24,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:24,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:24,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:25,802 INFO L124 PetriNetUnfolderBase]: 2287/3514 cut-off events. [2024-06-20 15:41:25,802 INFO L125 PetriNetUnfolderBase]: For 134791/134794 co-relation queries the response was YES. [2024-06-20 15:41:25,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22947 conditions, 3514 events. 2287/3514 cut-off events. For 134791/134794 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17925 event pairs, 609 based on Foata normal form. 4/3514 useless extension candidates. Maximal degree in co-relation 22892. Up to 2719 conditions per place. [2024-06-20 15:41:25,825 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 90 changer transitions 0/213 dead transitions. [2024-06-20 15:41:25,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 213 transitions, 2495 flow [2024-06-20 15:41:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-20 15:41:25,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-20 15:41:25,826 INFO L175 Difference]: Start difference. First operand has 126 places, 169 transitions, 1651 flow. Second operand 9 states and 190 transitions. [2024-06-20 15:41:25,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 213 transitions, 2495 flow [2024-06-20 15:41:25,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 213 transitions, 2316 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:25,908 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1716 flow [2024-06-20 15:41:25,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1716, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-20 15:41:25,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-20 15:41:25,908 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1716 flow [2024-06-20 15:41:25,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:25,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:41:25,909 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:25,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1710372468, now seen corresponding path program 6 times [2024-06-20 15:41:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:25,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153981883] [2024-06-20 15:41:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:26,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:26,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153981883] [2024-06-20 15:41:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153981883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:26,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:26,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:26,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638625746] [2024-06-20 15:41:26,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:26,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:26,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:26,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:26,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1716 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:26,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:26,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:26,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:27,814 INFO L124 PetriNetUnfolderBase]: 2277/3500 cut-off events. [2024-06-20 15:41:27,814 INFO L125 PetriNetUnfolderBase]: For 140938/140941 co-relation queries the response was YES. [2024-06-20 15:41:27,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22926 conditions, 3500 events. 2277/3500 cut-off events. For 140938/140941 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17864 event pairs, 614 based on Foata normal form. 4/3500 useless extension candidates. Maximal degree in co-relation 22870. Up to 2711 conditions per place. [2024-06-20 15:41:27,838 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 109 selfloop transitions, 95 changer transitions 0/209 dead transitions. [2024-06-20 15:41:27,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 209 transitions, 2366 flow [2024-06-20 15:41:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:41:27,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-20 15:41:27,841 INFO L175 Difference]: Start difference. First operand has 130 places, 172 transitions, 1716 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:41:27,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 209 transitions, 2366 flow [2024-06-20 15:41:27,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 2182 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:27,933 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 1730 flow [2024-06-20 15:41:27,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1730, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-06-20 15:41:27,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-20 15:41:27,934 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 1730 flow [2024-06-20 15:41:27,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:27,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:27,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:41:27,934 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:27,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1398059147, now seen corresponding path program 1 times [2024-06-20 15:41:27,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:27,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830756824] [2024-06-20 15:41:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:28,713 INFO 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 15:41:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:28,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830756824] [2024-06-20 15:41:28,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830756824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:28,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:28,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147118100] [2024-06-20 15:41:28,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:28,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:28,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:28,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:28,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 1730 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 15:41:28,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:28,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:28,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:29,299 INFO L124 PetriNetUnfolderBase]: 1962/3159 cut-off events. [2024-06-20 15:41:29,300 INFO L125 PetriNetUnfolderBase]: For 145866/145870 co-relation queries the response was YES. [2024-06-20 15:41:29,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21370 conditions, 3159 events. 1962/3159 cut-off events. For 145866/145870 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17151 event pairs, 610 based on Foata normal form. 5/3142 useless extension candidates. Maximal degree in co-relation 21313. Up to 2786 conditions per place. [2024-06-20 15:41:29,323 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 135 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2024-06-20 15:41:29,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2106 flow [2024-06-20 15:41:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-20 15:41:29,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-20 15:41:29,324 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 1730 flow. Second operand 6 states and 123 transitions. [2024-06-20 15:41:29,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2106 flow [2024-06-20 15:41:29,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 191 transitions, 1885 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:41:29,417 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1574 flow [2024-06-20 15:41:29,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1574, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-06-20 15:41:29,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-20 15:41:29,418 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1574 flow [2024-06-20 15:41:29,418 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 15:41:29,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:29,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:29,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:41:29,418 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:29,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1930909298, now seen corresponding path program 7 times [2024-06-20 15:41:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:29,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985017539] [2024-06-20 15:41:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985017539] [2024-06-20 15:41:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985017539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:30,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71703057] [2024-06-20 15:41:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:30,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:30,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:30,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:30,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:30,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1574 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:30,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:30,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:30,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:31,281 INFO L124 PetriNetUnfolderBase]: 2336/3604 cut-off events. [2024-06-20 15:41:31,282 INFO L125 PetriNetUnfolderBase]: For 158960/158960 co-relation queries the response was YES. [2024-06-20 15:41:31,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23889 conditions, 3604 events. 2336/3604 cut-off events. For 158960/158960 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18567 event pairs, 623 based on Foata normal form. 4/3600 useless extension candidates. Maximal degree in co-relation 23831. Up to 2764 conditions per place. [2024-06-20 15:41:31,308 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 96 changer transitions 0/219 dead transitions. [2024-06-20 15:41:31,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 219 transitions, 2496 flow [2024-06-20 15:41:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:41:31,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-20 15:41:31,310 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1574 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:41:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 219 transitions, 2496 flow [2024-06-20 15:41:31,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 219 transitions, 2455 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:31,409 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 1845 flow [2024-06-20 15:41:31,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1845, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-06-20 15:41:31,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-20 15:41:31,409 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 1845 flow [2024-06-20 15:41:31,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:31,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:31,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:31,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:41:31,410 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:31,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 354372098, now seen corresponding path program 8 times [2024-06-20 15:41:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:31,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578091596] [2024-06-20 15:41:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:32,303 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 15:41:32,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:32,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578091596] [2024-06-20 15:41:32,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578091596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:32,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:32,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609420115] [2024-06-20 15:41:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:32,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:32,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:32,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:32,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 1845 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:32,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:32,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:32,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:33,337 INFO L124 PetriNetUnfolderBase]: 2358/3641 cut-off events. [2024-06-20 15:41:33,337 INFO L125 PetriNetUnfolderBase]: For 169810/169810 co-relation queries the response was YES. [2024-06-20 15:41:33,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24767 conditions, 3641 events. 2358/3641 cut-off events. For 169810/169810 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18809 event pairs, 616 based on Foata normal form. 4/3637 useless extension candidates. Maximal degree in co-relation 24708. Up to 2783 conditions per place. [2024-06-20 15:41:33,363 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 100 changer transitions 0/223 dead transitions. [2024-06-20 15:41:33,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 2739 flow [2024-06-20 15:41:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:41:33,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-20 15:41:33,409 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 1845 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:41:33,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 2739 flow [2024-06-20 15:41:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 223 transitions, 2447 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:33,492 INFO L231 Difference]: Finished difference. Result has 138 places, 184 transitions, 1823 flow [2024-06-20 15:41:33,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1823, PETRI_PLACES=138, PETRI_TRANSITIONS=184} [2024-06-20 15:41:33,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-20 15:41:33,493 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 184 transitions, 1823 flow [2024-06-20 15:41:33,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:33,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:33,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:41:33,493 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:33,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:33,494 INFO L85 PathProgramCache]: Analyzing trace with hash -685119634, now seen corresponding path program 9 times [2024-06-20 15:41:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505867804] [2024-06-20 15:41:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:34,392 INFO 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 15:41:34,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:34,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505867804] [2024-06-20 15:41:34,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505867804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230753760] [2024-06-20 15:41:34,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:34,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:34,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:34,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 184 transitions, 1823 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:34,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:34,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:34,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:35,475 INFO L124 PetriNetUnfolderBase]: 2348/3627 cut-off events. [2024-06-20 15:41:35,475 INFO L125 PetriNetUnfolderBase]: For 173837/173837 co-relation queries the response was YES. [2024-06-20 15:41:35,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24684 conditions, 3627 events. 2348/3627 cut-off events. For 173837/173837 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18714 event pairs, 614 based on Foata normal form. 4/3623 useless extension candidates. Maximal degree in co-relation 24624. Up to 2775 conditions per place. [2024-06-20 15:41:35,500 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-20 15:41:35,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 221 transitions, 2517 flow [2024-06-20 15:41:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-20 15:41:35,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-20 15:41:35,501 INFO L175 Difference]: Start difference. First operand has 138 places, 184 transitions, 1823 flow. Second operand 9 states and 182 transitions. [2024-06-20 15:41:35,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 221 transitions, 2517 flow [2024-06-20 15:41:35,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 221 transitions, 2219 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:35,600 INFO L231 Difference]: Finished difference. Result has 140 places, 184 transitions, 1737 flow [2024-06-20 15:41:35,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=140, PETRI_TRANSITIONS=184} [2024-06-20 15:41:35,601 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-20 15:41:35,601 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 184 transitions, 1737 flow [2024-06-20 15:41:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:35,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:41:35,601 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:35,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash 611074418, now seen corresponding path program 10 times [2024-06-20 15:41:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:35,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654175292] [2024-06-20 15:41:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:36,519 INFO 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 15:41:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:36,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654175292] [2024-06-20 15:41:36,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654175292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:36,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:36,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847128034] [2024-06-20 15:41:36,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:36,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:36,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:36,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:36,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 184 transitions, 1737 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:36,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:36,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:36,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:37,524 INFO L124 PetriNetUnfolderBase]: 2338/3613 cut-off events. [2024-06-20 15:41:37,524 INFO L125 PetriNetUnfolderBase]: For 178747/178747 co-relation queries the response was YES. [2024-06-20 15:41:37,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24546 conditions, 3613 events. 2338/3613 cut-off events. For 178747/178747 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18631 event pairs, 631 based on Foata normal form. 4/3609 useless extension candidates. Maximal degree in co-relation 24485. Up to 2767 conditions per place. [2024-06-20 15:41:37,548 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 110 changer transitions 0/216 dead transitions. [2024-06-20 15:41:37,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 216 transitions, 2263 flow [2024-06-20 15:41:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:41:37,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 15:41:37,550 INFO L175 Difference]: Start difference. First operand has 140 places, 184 transitions, 1737 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:41:37,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 216 transitions, 2263 flow [2024-06-20 15:41:37,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 216 transitions, 2033 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:37,654 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1735 flow [2024-06-20 15:41:37,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1735, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-20 15:41:37,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-20 15:41:37,656 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1735 flow [2024-06-20 15:41:37,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:37,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:37,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:37,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:41:37,656 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:37,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:37,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1384726667, now seen corresponding path program 2 times [2024-06-20 15:41:37,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:37,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247706559] [2024-06-20 15:41:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:38,457 INFO 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 15:41:38,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247706559] [2024-06-20 15:41:38,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247706559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:38,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:38,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:38,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415499817] [2024-06-20 15:41:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:38,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:38,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:38,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1735 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 15:41:38,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:38,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:38,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:38,962 INFO L124 PetriNetUnfolderBase]: 1990/3234 cut-off events. [2024-06-20 15:41:38,963 INFO L125 PetriNetUnfolderBase]: For 183088/183101 co-relation queries the response was YES. [2024-06-20 15:41:38,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22865 conditions, 3234 events. 1990/3234 cut-off events. For 183088/183101 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17804 event pairs, 613 based on Foata normal form. 11/3221 useless extension candidates. Maximal degree in co-relation 22803. Up to 2828 conditions per place. [2024-06-20 15:41:38,988 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 137 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-20 15:41:38,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2115 flow [2024-06-20 15:41:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-20 15:41:38,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-20 15:41:38,989 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1735 flow. Second operand 6 states and 119 transitions. [2024-06-20 15:41:38,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2115 flow [2024-06-20 15:41:39,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 1831 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:41:39,102 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 1531 flow [2024-06-20 15:41:39,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-20 15:41:39,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-20 15:41:39,103 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 1531 flow [2024-06-20 15:41:39,103 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 15:41:39,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:39,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:39,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:41:39,103 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:39,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash -189258275, now seen corresponding path program 1 times [2024-06-20 15:41:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:39,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982526598] [2024-06-20 15:41:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:39,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:39,868 INFO 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 15:41:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982526598] [2024-06-20 15:41:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982526598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:39,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:39,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246983070] [2024-06-20 15:41:39,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:39,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:39,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:39,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:39,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:39,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:39,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 1531 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 15:41:39,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:39,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:39,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:40,428 INFO L124 PetriNetUnfolderBase]: 1975/3213 cut-off events. [2024-06-20 15:41:40,428 INFO L125 PetriNetUnfolderBase]: For 164635/164660 co-relation queries the response was YES. [2024-06-20 15:41:40,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 3213 events. 1975/3213 cut-off events. For 164635/164660 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17631 event pairs, 564 based on Foata normal form. 26/3217 useless extension candidates. Maximal degree in co-relation 21304. Up to 2855 conditions per place. [2024-06-20 15:41:40,452 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 173 selfloop transitions, 11 changer transitions 0/202 dead transitions. [2024-06-20 15:41:40,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 1969 flow [2024-06-20 15:41:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 15:41:40,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:41:40,453 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 1531 flow. Second operand 6 states and 120 transitions. [2024-06-20 15:41:40,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 1969 flow [2024-06-20 15:41:40,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 1911 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:40,561 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1541 flow [2024-06-20 15:41:40,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1541, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-20 15:41:40,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-20 15:41:40,562 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1541 flow [2024-06-20 15:41:40,562 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 15:41:40,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:40,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:41:40,562 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:40,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1384719723, now seen corresponding path program 2 times [2024-06-20 15:41:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015604102] [2024-06-20 15:41:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:40,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015604102] [2024-06-20 15:41:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015604102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:41,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:41,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310061543] [2024-06-20 15:41:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:41,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:41,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1541 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 15:41:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:41,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:41,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:41,886 INFO L124 PetriNetUnfolderBase]: 1976/3214 cut-off events. [2024-06-20 15:41:41,887 INFO L125 PetriNetUnfolderBase]: For 170571/170599 co-relation queries the response was YES. [2024-06-20 15:41:41,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21777 conditions, 3214 events. 1976/3214 cut-off events. For 170571/170599 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17678 event pairs, 568 based on Foata normal form. 28/3219 useless extension candidates. Maximal degree in co-relation 21713. Up to 2845 conditions per place. [2024-06-20 15:41:41,911 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 168 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2024-06-20 15:41:41,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 202 transitions, 1975 flow [2024-06-20 15:41:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-20 15:41:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-20 15:41:41,913 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1541 flow. Second operand 6 states and 119 transitions. [2024-06-20 15:41:41,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 202 transitions, 1975 flow [2024-06-20 15:41:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 202 transitions, 1929 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:42,074 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 1579 flow [2024-06-20 15:41:42,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1579, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-20 15:41:42,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-20 15:41:42,075 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 1579 flow [2024-06-20 15:41:42,075 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 15:41:42,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:42,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:41:42,076 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:42,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 682588392, now seen corresponding path program 1 times [2024-06-20 15:41:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:42,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650550779] [2024-06-20 15:41:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:42,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:43,033 INFO 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 15:41:43,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:43,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650550779] [2024-06-20 15:41:43,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650550779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:43,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:43,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450969218] [2024-06-20 15:41:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:43,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:43,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:43,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:43,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 1579 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:43,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:43,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:43,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:44,055 INFO L124 PetriNetUnfolderBase]: 2379/3676 cut-off events. [2024-06-20 15:41:44,055 INFO L125 PetriNetUnfolderBase]: For 215139/215143 co-relation queries the response was YES. [2024-06-20 15:41:44,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26351 conditions, 3676 events. 2379/3676 cut-off events. For 215139/215143 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19085 event pairs, 482 based on Foata normal form. 8/3683 useless extension candidates. Maximal degree in co-relation 26286. Up to 3349 conditions per place. [2024-06-20 15:41:44,081 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-20 15:41:44,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 242 transitions, 2443 flow [2024-06-20 15:41:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:41:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:41:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:41:44,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 15:41:44,083 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 1579 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:41:44,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 242 transitions, 2443 flow [2024-06-20 15:41:44,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 242 transitions, 2381 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:44,198 INFO L231 Difference]: Finished difference. Result has 148 places, 197 transitions, 1684 flow [2024-06-20 15:41:44,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1684, PETRI_PLACES=148, PETRI_TRANSITIONS=197} [2024-06-20 15:41:44,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-20 15:41:44,199 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 197 transitions, 1684 flow [2024-06-20 15:41:44,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:44,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:44,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:41:44,199 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:44,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1918382614, now seen corresponding path program 2 times [2024-06-20 15:41:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139539767] [2024-06-20 15:41:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139539767] [2024-06-20 15:41:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139539767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897588727] [2024-06-20 15:41:45,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:45,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:45,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 197 transitions, 1684 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:45,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:45,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:45,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:46,221 INFO L124 PetriNetUnfolderBase]: 2371/3664 cut-off events. [2024-06-20 15:41:46,221 INFO L125 PetriNetUnfolderBase]: For 223324/223328 co-relation queries the response was YES. [2024-06-20 15:41:46,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26623 conditions, 3664 events. 2371/3664 cut-off events. For 223324/223328 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18972 event pairs, 621 based on Foata normal form. 8/3671 useless extension candidates. Maximal degree in co-relation 26557. Up to 3396 conditions per place. [2024-06-20 15:41:46,249 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 26 changer transitions 0/235 dead transitions. [2024-06-20 15:41:46,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 235 transitions, 2268 flow [2024-06-20 15:41:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:41:46,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:41:46,250 INFO L175 Difference]: Start difference. First operand has 148 places, 197 transitions, 1684 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:41:46,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 235 transitions, 2268 flow [2024-06-20 15:41:46,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 235 transitions, 2150 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:46,398 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 1625 flow [2024-06-20 15:41:46,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1625, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-06-20 15:41:46,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-20 15:41:46,399 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 1625 flow [2024-06-20 15:41:46,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:46,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:46,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:46,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:41:46,399 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:46,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1869407212, now seen corresponding path program 3 times [2024-06-20 15:41:46,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:46,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960282874] [2024-06-20 15:41:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:47,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960282874] [2024-06-20 15:41:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960282874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:47,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581402386] [2024-06-20 15:41:47,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:47,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:47,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:47,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:47,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 1625 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:47,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:47,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:47,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:48,280 INFO L124 PetriNetUnfolderBase]: 2388/3692 cut-off events. [2024-06-20 15:41:48,280 INFO L125 PetriNetUnfolderBase]: For 234511/234518 co-relation queries the response was YES. [2024-06-20 15:41:48,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26909 conditions, 3692 events. 2388/3692 cut-off events. For 234511/234518 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19229 event pairs, 627 based on Foata normal form. 10/3700 useless extension candidates. Maximal degree in co-relation 26841. Up to 3271 conditions per place. [2024-06-20 15:41:48,308 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 164 selfloop transitions, 66 changer transitions 0/235 dead transitions. [2024-06-20 15:41:48,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 235 transitions, 2255 flow [2024-06-20 15:41:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:41:48,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-20 15:41:48,310 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 1625 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:41:48,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 235 transitions, 2255 flow [2024-06-20 15:41:48,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 235 transitions, 2198 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:41:48,464 INFO L231 Difference]: Finished difference. Result has 152 places, 199 transitions, 1763 flow [2024-06-20 15:41:48,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1763, PETRI_PLACES=152, PETRI_TRANSITIONS=199} [2024-06-20 15:41:48,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-20 15:41:48,465 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 199 transitions, 1763 flow [2024-06-20 15:41:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:48,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:48,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:41:48,465 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:48,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1516134099, now seen corresponding path program 1 times [2024-06-20 15:41:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886784959] [2024-06-20 15:41:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:49,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:49,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886784959] [2024-06-20 15:41:49,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886784959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:49,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032792706] [2024-06-20 15:41:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:49,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:49,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:49,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 199 transitions, 1763 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:49,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:49,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:49,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:49,938 INFO L124 PetriNetUnfolderBase]: 2047/3325 cut-off events. [2024-06-20 15:41:49,938 INFO L125 PetriNetUnfolderBase]: For 240121/240131 co-relation queries the response was YES. [2024-06-20 15:41:49,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25288 conditions, 3325 events. 2047/3325 cut-off events. For 240121/240131 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18501 event pairs, 589 based on Foata normal form. 6/3308 useless extension candidates. Maximal degree in co-relation 25219. Up to 2853 conditions per place. [2024-06-20 15:41:49,965 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 157 selfloop transitions, 21 changer transitions 0/226 dead transitions. [2024-06-20 15:41:49,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 2243 flow [2024-06-20 15:41:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-20 15:41:49,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-20 15:41:49,966 INFO L175 Difference]: Start difference. First operand has 152 places, 199 transitions, 1763 flow. Second operand 7 states and 145 transitions. [2024-06-20 15:41:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 2243 flow [2024-06-20 15:41:50,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 226 transitions, 2066 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:50,111 INFO L231 Difference]: Finished difference. Result has 152 places, 202 transitions, 1685 flow [2024-06-20 15:41:50,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1685, PETRI_PLACES=152, PETRI_TRANSITIONS=202} [2024-06-20 15:41:50,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-20 15:41:50,112 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 202 transitions, 1685 flow [2024-06-20 15:41:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:50,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:50,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:50,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:41:50,112 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:50,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1488371308, now seen corresponding path program 4 times [2024-06-20 15:41:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:50,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337238707] [2024-06-20 15:41:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:51,059 INFO 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 15:41:51,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:51,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337238707] [2024-06-20 15:41:51,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337238707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:51,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:51,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:51,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125183256] [2024-06-20 15:41:51,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:51,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:51,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:51,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:51,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:51,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:51,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 202 transitions, 1685 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:51,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:51,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:51,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:52,043 INFO L124 PetriNetUnfolderBase]: 2415/3735 cut-off events. [2024-06-20 15:41:52,043 INFO L125 PetriNetUnfolderBase]: For 256299/256302 co-relation queries the response was YES. [2024-06-20 15:41:52,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28016 conditions, 3735 events. 2415/3735 cut-off events. For 256299/256302 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19533 event pairs, 628 based on Foata normal form. 6/3739 useless extension candidates. Maximal degree in co-relation 27946. Up to 3312 conditions per place. [2024-06-20 15:41:52,074 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 169 selfloop transitions, 63 changer transitions 0/237 dead transitions. [2024-06-20 15:41:52,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 237 transitions, 2311 flow [2024-06-20 15:41:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:41:52,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:41:52,075 INFO L175 Difference]: Start difference. First operand has 152 places, 202 transitions, 1685 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:41:52,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 237 transitions, 2311 flow [2024-06-20 15:41:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 237 transitions, 2240 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:52,205 INFO L231 Difference]: Finished difference. Result has 156 places, 204 transitions, 1807 flow [2024-06-20 15:41:52,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1807, PETRI_PLACES=156, PETRI_TRANSITIONS=204} [2024-06-20 15:41:52,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-20 15:41:52,206 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 204 transitions, 1807 flow [2024-06-20 15:41:52,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:52,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:52,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:52,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:41:52,206 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:52,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 273131638, now seen corresponding path program 1 times [2024-06-20 15:41:52,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:52,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015133761] [2024-06-20 15:41:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:53,264 INFO 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 15:41:53,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:53,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015133761] [2024-06-20 15:41:53,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015133761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:53,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:53,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118010914] [2024-06-20 15:41:53,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:53,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:53,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:53,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:53,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 204 transitions, 1807 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:53,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:53,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:53,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:54,218 INFO L124 PetriNetUnfolderBase]: 2432/3762 cut-off events. [2024-06-20 15:41:54,218 INFO L125 PetriNetUnfolderBase]: For 269872/269879 co-relation queries the response was YES. [2024-06-20 15:41:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28720 conditions, 3762 events. 2432/3762 cut-off events. For 269872/269879 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19659 event pairs, 592 based on Foata normal form. 8/3766 useless extension candidates. Maximal degree in co-relation 28649. Up to 3435 conditions per place. [2024-06-20 15:41:54,250 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 40 changer transitions 0/243 dead transitions. [2024-06-20 15:41:54,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 243 transitions, 2463 flow [2024-06-20 15:41:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:41:54,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:41:54,252 INFO L175 Difference]: Start difference. First operand has 156 places, 204 transitions, 1807 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:41:54,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 243 transitions, 2463 flow [2024-06-20 15:41:54,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 243 transitions, 2288 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:54,480 INFO L231 Difference]: Finished difference. Result has 159 places, 209 transitions, 1798 flow [2024-06-20 15:41:54,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1798, PETRI_PLACES=159, PETRI_TRANSITIONS=209} [2024-06-20 15:41:54,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-20 15:41:54,481 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 209 transitions, 1798 flow [2024-06-20 15:41:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:54,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:54,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:54,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:41:54,481 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:54,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1515776049, now seen corresponding path program 2 times [2024-06-20 15:41:54,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:54,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403762188] [2024-06-20 15:41:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:54,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:55,329 INFO 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 15:41:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:55,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403762188] [2024-06-20 15:41:55,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403762188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:55,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079821395] [2024-06-20 15:41:55,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:55,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:55,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:55,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:55,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:55,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 209 transitions, 1798 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:55,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:55,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:55,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:56,017 INFO L124 PetriNetUnfolderBase]: 2084/3388 cut-off events. [2024-06-20 15:41:56,017 INFO L125 PetriNetUnfolderBase]: For 272492/272500 co-relation queries the response was YES. [2024-06-20 15:41:56,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26906 conditions, 3388 events. 2084/3388 cut-off events. For 272492/272500 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18834 event pairs, 568 based on Foata normal form. 1/3366 useless extension candidates. Maximal degree in co-relation 26833. Up to 2896 conditions per place. [2024-06-20 15:41:56,045 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 155 selfloop transitions, 25 changer transitions 0/229 dead transitions. [2024-06-20 15:41:56,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 229 transitions, 2260 flow [2024-06-20 15:41:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 15:41:56,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-20 15:41:56,046 INFO L175 Difference]: Start difference. First operand has 159 places, 209 transitions, 1798 flow. Second operand 7 states and 141 transitions. [2024-06-20 15:41:56,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 229 transitions, 2260 flow [2024-06-20 15:41:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 229 transitions, 2137 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:56,222 INFO L231 Difference]: Finished difference. Result has 160 places, 212 transitions, 1785 flow [2024-06-20 15:41:56,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1785, PETRI_PLACES=160, PETRI_TRANSITIONS=212} [2024-06-20 15:41:56,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-20 15:41:56,223 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 212 transitions, 1785 flow [2024-06-20 15:41:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:56,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:56,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:56,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:41:56,223 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:56,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash 9338297, now seen corresponding path program 1 times [2024-06-20 15:41:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:56,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22999297] [2024-06-20 15:41:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:57,333 INFO 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 15:41:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22999297] [2024-06-20 15:41:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22999297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:57,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:41:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675441397] [2024-06-20 15:41:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:41:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:41:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:41:57,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:41:57,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 212 transitions, 1785 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:57,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:57,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:41:57,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:58,046 INFO L124 PetriNetUnfolderBase]: 2098/3404 cut-off events. [2024-06-20 15:41:58,046 INFO L125 PetriNetUnfolderBase]: For 282508/282522 co-relation queries the response was YES. [2024-06-20 15:41:58,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27401 conditions, 3404 events. 2098/3404 cut-off events. For 282508/282522 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18934 event pairs, 567 based on Foata normal form. 5/3386 useless extension candidates. Maximal degree in co-relation 27327. Up to 2946 conditions per place. [2024-06-20 15:41:58,079 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 16 changer transitions 0/232 dead transitions. [2024-06-20 15:41:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 232 transitions, 2245 flow [2024-06-20 15:41:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:41:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:41:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 15:41:58,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-20 15:41:58,080 INFO L175 Difference]: Start difference. First operand has 160 places, 212 transitions, 1785 flow. Second operand 7 states and 139 transitions. [2024-06-20 15:41:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 232 transitions, 2245 flow [2024-06-20 15:41:58,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 232 transitions, 2157 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:58,245 INFO L231 Difference]: Finished difference. Result has 162 places, 215 transitions, 1779 flow [2024-06-20 15:41:58,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1779, PETRI_PLACES=162, PETRI_TRANSITIONS=215} [2024-06-20 15:41:58,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-20 15:41:58,246 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 215 transitions, 1779 flow [2024-06-20 15:41:58,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:58,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:58,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:41:58,246 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:58,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1065655734, now seen corresponding path program 5 times [2024-06-20 15:41:58,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457438678] [2024-06-20 15:41:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457438678] [2024-06-20 15:41:59,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457438678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:59,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:59,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650856866] [2024-06-20 15:41:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:59,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:59,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:59,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 215 transitions, 1779 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:59,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:59,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:59,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:00,194 INFO L124 PetriNetUnfolderBase]: 2439/3772 cut-off events. [2024-06-20 15:42:00,194 INFO L125 PetriNetUnfolderBase]: For 295872/295872 co-relation queries the response was YES. [2024-06-20 15:42:00,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29827 conditions, 3772 events. 2439/3772 cut-off events. For 295872/295872 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19668 event pairs, 606 based on Foata normal form. 4/3768 useless extension candidates. Maximal degree in co-relation 29752. Up to 3348 conditions per place. [2024-06-20 15:42:00,228 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 178 selfloop transitions, 63 changer transitions 0/246 dead transitions. [2024-06-20 15:42:00,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 246 transitions, 2417 flow [2024-06-20 15:42:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 15:42:00,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:42:00,230 INFO L175 Difference]: Start difference. First operand has 162 places, 215 transitions, 1779 flow. Second operand 9 states and 171 transitions. [2024-06-20 15:42:00,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 246 transitions, 2417 flow [2024-06-20 15:42:00,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 2357 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:00,477 INFO L231 Difference]: Finished difference. Result has 166 places, 217 transitions, 1918 flow [2024-06-20 15:42:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1918, PETRI_PLACES=166, PETRI_TRANSITIONS=217} [2024-06-20 15:42:00,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-20 15:42:00,477 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 217 transitions, 1918 flow [2024-06-20 15:42:00,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:00,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:00,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:42:00,478 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:00,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2048785420, now seen corresponding path program 2 times [2024-06-20 15:42:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854532485] [2024-06-20 15:42:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:00,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:01,528 INFO 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 15:42:01,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:01,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854532485] [2024-06-20 15:42:01,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854532485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:01,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:01,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:01,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320465908] [2024-06-20 15:42:01,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:01,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:01,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:01,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:01,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:01,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 217 transitions, 1918 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:01,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:01,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:01,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:02,523 INFO L124 PetriNetUnfolderBase]: 2467/3822 cut-off events. [2024-06-20 15:42:02,523 INFO L125 PetriNetUnfolderBase]: For 309419/309432 co-relation queries the response was YES. [2024-06-20 15:42:02,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30671 conditions, 3822 events. 2467/3822 cut-off events. For 309419/309432 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20031 event pairs, 589 based on Foata normal form. 14/3833 useless extension candidates. Maximal degree in co-relation 30595. Up to 3483 conditions per place. [2024-06-20 15:42:02,555 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 50 changer transitions 0/258 dead transitions. [2024-06-20 15:42:02,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 258 transitions, 2639 flow [2024-06-20 15:42:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:42:02,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-20 15:42:02,556 INFO L175 Difference]: Start difference. First operand has 166 places, 217 transitions, 1918 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:42:02,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 258 transitions, 2639 flow [2024-06-20 15:42:02,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 2458 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:02,796 INFO L231 Difference]: Finished difference. Result has 169 places, 227 transitions, 1978 flow [2024-06-20 15:42:02,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1978, PETRI_PLACES=169, PETRI_TRANSITIONS=227} [2024-06-20 15:42:02,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-20 15:42:02,796 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 227 transitions, 1978 flow [2024-06-20 15:42:02,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:02,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:02,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:02,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:42:02,797 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:02,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash -100038700, now seen corresponding path program 3 times [2024-06-20 15:42:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775192854] [2024-06-20 15:42:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:03,903 INFO 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 15:42:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775192854] [2024-06-20 15:42:03,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775192854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:03,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:03,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916405949] [2024-06-20 15:42:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:04,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:04,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 227 transitions, 1978 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:04,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:04,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:04,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:04,916 INFO L124 PetriNetUnfolderBase]: 2484/3849 cut-off events. [2024-06-20 15:42:04,917 INFO L125 PetriNetUnfolderBase]: For 322290/322303 co-relation queries the response was YES. [2024-06-20 15:42:04,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31355 conditions, 3849 events. 2484/3849 cut-off events. For 322290/322303 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20280 event pairs, 548 based on Foata normal form. 14/3860 useless extension candidates. Maximal degree in co-relation 31277. Up to 3422 conditions per place. [2024-06-20 15:42:04,948 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 57 changer transitions 0/265 dead transitions. [2024-06-20 15:42:04,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 265 transitions, 2916 flow [2024-06-20 15:42:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 15:42:04,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:42:04,949 INFO L175 Difference]: Start difference. First operand has 169 places, 227 transitions, 1978 flow. Second operand 9 states and 172 transitions. [2024-06-20 15:42:04,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 265 transitions, 2916 flow [2024-06-20 15:42:05,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 265 transitions, 2795 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:05,165 INFO L231 Difference]: Finished difference. Result has 174 places, 231 transitions, 2106 flow [2024-06-20 15:42:05,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2106, PETRI_PLACES=174, PETRI_TRANSITIONS=231} [2024-06-20 15:42:05,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-20 15:42:05,166 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 231 transitions, 2106 flow [2024-06-20 15:42:05,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:05,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:05,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:05,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:42:05,167 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:05,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash -395614090, now seen corresponding path program 4 times [2024-06-20 15:42:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:05,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693027700] [2024-06-20 15:42:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:05,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:06,224 INFO 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 15:42:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693027700] [2024-06-20 15:42:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693027700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:06,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:06,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467792089] [2024-06-20 15:42:06,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:06,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:06,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:06,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:06,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 231 transitions, 2106 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:06,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:06,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:06,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:07,260 INFO L124 PetriNetUnfolderBase]: 2501/3881 cut-off events. [2024-06-20 15:42:07,261 INFO L125 PetriNetUnfolderBase]: For 335413/335426 co-relation queries the response was YES. [2024-06-20 15:42:07,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31549 conditions, 3881 events. 2501/3881 cut-off events. For 335413/335426 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20534 event pairs, 594 based on Foata normal form. 14/3892 useless extension candidates. Maximal degree in co-relation 31470. Up to 3537 conditions per place. [2024-06-20 15:42:07,295 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 49 changer transitions 0/265 dead transitions. [2024-06-20 15:42:07,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 265 transitions, 2805 flow [2024-06-20 15:42:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:42:07,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-20 15:42:07,296 INFO L175 Difference]: Start difference. First operand has 174 places, 231 transitions, 2106 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:42:07,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 265 transitions, 2805 flow [2024-06-20 15:42:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 265 transitions, 2651 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:07,529 INFO L231 Difference]: Finished difference. Result has 179 places, 234 transitions, 2148 flow [2024-06-20 15:42:07,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2148, PETRI_PLACES=179, PETRI_TRANSITIONS=234} [2024-06-20 15:42:07,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-20 15:42:07,530 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 234 transitions, 2148 flow [2024-06-20 15:42:07,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:07,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:07,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:07,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:42:07,530 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:07,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1892862964, now seen corresponding path program 5 times [2024-06-20 15:42:07,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:07,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638995893] [2024-06-20 15:42:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:07,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:08,560 INFO 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 15:42:08,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:08,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638995893] [2024-06-20 15:42:08,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638995893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:08,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:08,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:08,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253764856] [2024-06-20 15:42:08,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:08,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:08,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 234 transitions, 2148 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:08,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:08,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:08,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:09,584 INFO L124 PetriNetUnfolderBase]: 2493/3870 cut-off events. [2024-06-20 15:42:09,584 INFO L125 PetriNetUnfolderBase]: For 340746/340759 co-relation queries the response was YES. [2024-06-20 15:42:09,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31426 conditions, 3870 events. 2493/3870 cut-off events. For 340746/340759 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20475 event pairs, 592 based on Foata normal form. 14/3881 useless extension candidates. Maximal degree in co-relation 31344. Up to 3525 conditions per place. [2024-06-20 15:42:09,619 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 47 changer transitions 0/266 dead transitions. [2024-06-20 15:42:09,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 266 transitions, 2778 flow [2024-06-20 15:42:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 15:42:09,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:42:09,620 INFO L175 Difference]: Start difference. First operand has 179 places, 234 transitions, 2148 flow. Second operand 9 states and 171 transitions. [2024-06-20 15:42:09,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 266 transitions, 2778 flow [2024-06-20 15:42:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 266 transitions, 2611 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:42:09,908 INFO L231 Difference]: Finished difference. Result has 182 places, 234 transitions, 2082 flow [2024-06-20 15:42:09,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2082, PETRI_PLACES=182, PETRI_TRANSITIONS=234} [2024-06-20 15:42:09,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-20 15:42:09,908 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 234 transitions, 2082 flow [2024-06-20 15:42:09,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:09,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:09,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:09,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:42:09,909 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:09,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash 23623097, now seen corresponding path program 2 times [2024-06-20 15:42:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794103615] [2024-06-20 15:42:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:11,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794103615] [2024-06-20 15:42:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794103615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:11,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:11,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:11,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370770952] [2024-06-20 15:42:11,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:11,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:11,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:11,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 234 transitions, 2082 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:11,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:11,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:11,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:11,694 INFO L124 PetriNetUnfolderBase]: 2149/3486 cut-off events. [2024-06-20 15:42:11,694 INFO L125 PetriNetUnfolderBase]: For 342993/343016 co-relation queries the response was YES. [2024-06-20 15:42:11,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29286 conditions, 3486 events. 2149/3486 cut-off events. For 342993/343016 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19466 event pairs, 568 based on Foata normal form. 11/3465 useless extension candidates. Maximal degree in co-relation 29203. Up to 3014 conditions per place. [2024-06-20 15:42:11,723 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 28 changer transitions 0/255 dead transitions. [2024-06-20 15:42:11,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 255 transitions, 2746 flow [2024-06-20 15:42:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:42:11,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 15:42:11,724 INFO L175 Difference]: Start difference. First operand has 182 places, 234 transitions, 2082 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:42:11,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 255 transitions, 2746 flow [2024-06-20 15:42:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 255 transitions, 2589 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 15:42:11,976 INFO L231 Difference]: Finished difference. Result has 179 places, 242 transitions, 2112 flow [2024-06-20 15:42:11,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2112, PETRI_PLACES=179, PETRI_TRANSITIONS=242} [2024-06-20 15:42:11,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-20 15:42:11,977 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 242 transitions, 2112 flow [2024-06-20 15:42:11,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:11,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:11,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:42:11,977 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:11,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash 23147433, now seen corresponding path program 3 times [2024-06-20 15:42:11,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021158003] [2024-06-20 15:42:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:11,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:12,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021158003] [2024-06-20 15:42:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021158003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:12,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66190274] [2024-06-20 15:42:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:12,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:12,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 242 transitions, 2112 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:12,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:12,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:12,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:13,586 INFO L124 PetriNetUnfolderBase]: 2150/3479 cut-off events. [2024-06-20 15:42:13,586 INFO L125 PetriNetUnfolderBase]: For 354086/354086 co-relation queries the response was YES. [2024-06-20 15:42:13,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29492 conditions, 3479 events. 2150/3479 cut-off events. For 354086/354086 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19275 event pairs, 575 based on Foata normal form. 1/3437 useless extension candidates. Maximal degree in co-relation 29410. Up to 2974 conditions per place. [2024-06-20 15:42:13,622 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 174 selfloop transitions, 32 changer transitions 0/256 dead transitions. [2024-06-20 15:42:13,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 256 transitions, 2616 flow [2024-06-20 15:42:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:42:13,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 15:42:13,624 INFO L175 Difference]: Start difference. First operand has 179 places, 242 transitions, 2112 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:42:13,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 256 transitions, 2616 flow [2024-06-20 15:42:13,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 256 transitions, 2547 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:42:13,914 INFO L231 Difference]: Finished difference. Result has 183 places, 245 transitions, 2177 flow [2024-06-20 15:42:13,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2177, PETRI_PLACES=183, PETRI_TRANSITIONS=245} [2024-06-20 15:42:13,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-20 15:42:13,915 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 245 transitions, 2177 flow [2024-06-20 15:42:13,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:13,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:13,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:13,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:42:13,915 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:13,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1503753505, now seen corresponding path program 3 times [2024-06-20 15:42:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:13,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460840859] [2024-06-20 15:42:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:15,096 INFO 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 15:42:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:15,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460840859] [2024-06-20 15:42:15,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460840859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:15,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:15,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:15,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475826197] [2024-06-20 15:42:15,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:15,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:15,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:15,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:15,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:15,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 245 transitions, 2177 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:15,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:15,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:15,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:15,799 INFO L124 PetriNetUnfolderBase]: 2143/3473 cut-off events. [2024-06-20 15:42:15,799 INFO L125 PetriNetUnfolderBase]: For 364695/364708 co-relation queries the response was YES. [2024-06-20 15:42:15,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29954 conditions, 3473 events. 2143/3473 cut-off events. For 364695/364708 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19275 event pairs, 568 based on Foata normal form. 11/3446 useless extension candidates. Maximal degree in co-relation 29870. Up to 3016 conditions per place. [2024-06-20 15:42:15,832 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 187 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2024-06-20 15:42:15,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 258 transitions, 2640 flow [2024-06-20 15:42:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 15:42:15,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-20 15:42:15,833 INFO L175 Difference]: Start difference. First operand has 183 places, 245 transitions, 2177 flow. Second operand 7 states and 135 transitions. [2024-06-20 15:42:15,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 258 transitions, 2640 flow [2024-06-20 15:42:16,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 258 transitions, 2500 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:16,127 INFO L231 Difference]: Finished difference. Result has 185 places, 246 transitions, 2094 flow [2024-06-20 15:42:16,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2094, PETRI_PLACES=185, PETRI_TRANSITIONS=246} [2024-06-20 15:42:16,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-20 15:42:16,127 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 246 transitions, 2094 flow [2024-06-20 15:42:16,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:16,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:16,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:16,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:42:16,127 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:16,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -183296106, now seen corresponding path program 1 times [2024-06-20 15:42:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:16,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545360599] [2024-06-20 15:42:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:16,914 INFO 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 15:42:16,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545360599] [2024-06-20 15:42:16,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545360599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:16,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:16,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820031274] [2024-06-20 15:42:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:16,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:16,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 246 transitions, 2094 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:16,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:16,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:16,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:17,695 INFO L124 PetriNetUnfolderBase]: 2251/3628 cut-off events. [2024-06-20 15:42:17,695 INFO L125 PetriNetUnfolderBase]: For 383565/383590 co-relation queries the response was YES. [2024-06-20 15:42:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30540 conditions, 3628 events. 2251/3628 cut-off events. For 383565/383590 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20133 event pairs, 549 based on Foata normal form. 27/3647 useless extension candidates. Maximal degree in co-relation 30455. Up to 3150 conditions per place. [2024-06-20 15:42:17,728 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 14 changer transitions 0/266 dead transitions. [2024-06-20 15:42:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 266 transitions, 2658 flow [2024-06-20 15:42:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 15:42:17,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:42:17,729 INFO L175 Difference]: Start difference. First operand has 185 places, 246 transitions, 2094 flow. Second operand 7 states and 140 transitions. [2024-06-20 15:42:17,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 266 transitions, 2658 flow [2024-06-20 15:42:17,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 266 transitions, 2612 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:17,991 INFO L231 Difference]: Finished difference. Result has 187 places, 249 transitions, 2136 flow [2024-06-20 15:42:17,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2136, PETRI_PLACES=187, PETRI_TRANSITIONS=249} [2024-06-20 15:42:17,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-20 15:42:17,992 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 249 transitions, 2136 flow [2024-06-20 15:42:17,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:17,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:17,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:17,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:42:17,992 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -183290526, now seen corresponding path program 2 times [2024-06-20 15:42:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110790883] [2024-06-20 15:42:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:18,824 INFO 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 15:42:18,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:18,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110790883] [2024-06-20 15:42:18,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110790883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:18,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:18,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:18,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510123819] [2024-06-20 15:42:18,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:18,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:18,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:18,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:18,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 249 transitions, 2136 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:18,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:18,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:18,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:19,576 INFO L124 PetriNetUnfolderBase]: 2257/3635 cut-off events. [2024-06-20 15:42:19,576 INFO L125 PetriNetUnfolderBase]: For 396132/396157 co-relation queries the response was YES. [2024-06-20 15:42:19,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31146 conditions, 3635 events. 2257/3635 cut-off events. For 396132/396157 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20138 event pairs, 544 based on Foata normal form. 27/3654 useless extension candidates. Maximal degree in co-relation 31060. Up to 3151 conditions per place. [2024-06-20 15:42:19,610 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 19 changer transitions 0/267 dead transitions. [2024-06-20 15:42:19,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 267 transitions, 2702 flow [2024-06-20 15:42:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 15:42:19,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:42:19,611 INFO L175 Difference]: Start difference. First operand has 187 places, 249 transitions, 2136 flow. Second operand 7 states and 140 transitions. [2024-06-20 15:42:19,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 267 transitions, 2702 flow [2024-06-20 15:42:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 267 transitions, 2636 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:19,938 INFO L231 Difference]: Finished difference. Result has 189 places, 252 transitions, 2174 flow [2024-06-20 15:42:19,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2174, PETRI_PLACES=189, PETRI_TRANSITIONS=252} [2024-06-20 15:42:19,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-20 15:42:19,939 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 252 transitions, 2174 flow [2024-06-20 15:42:19,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:19,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:19,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:42:19,940 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 314826951, now seen corresponding path program 1 times [2024-06-20 15:42:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204024928] [2024-06-20 15:42:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:21,013 INFO 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 15:42:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204024928] [2024-06-20 15:42:21,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204024928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:21,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:21,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353068938] [2024-06-20 15:42:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:21,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:21,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:21,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:21,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 252 transitions, 2174 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:21,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:21,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:21,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:21,780 INFO L124 PetriNetUnfolderBase]: 2272/3656 cut-off events. [2024-06-20 15:42:21,781 INFO L125 PetriNetUnfolderBase]: For 411297/411322 co-relation queries the response was YES. [2024-06-20 15:42:21,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31775 conditions, 3656 events. 2272/3656 cut-off events. For 411297/411322 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20255 event pairs, 542 based on Foata normal form. 28/3676 useless extension candidates. Maximal degree in co-relation 31688. Up to 3185 conditions per place. [2024-06-20 15:42:21,817 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 14 changer transitions 0/269 dead transitions. [2024-06-20 15:42:21,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 269 transitions, 2734 flow [2024-06-20 15:42:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:42:21,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 15:42:21,818 INFO L175 Difference]: Start difference. First operand has 189 places, 252 transitions, 2174 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:42:21,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 269 transitions, 2734 flow [2024-06-20 15:42:22,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 269 transitions, 2652 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:22,151 INFO L231 Difference]: Finished difference. Result has 191 places, 255 transitions, 2180 flow [2024-06-20 15:42:22,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2180, PETRI_PLACES=191, PETRI_TRANSITIONS=255} [2024-06-20 15:42:22,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-20 15:42:22,152 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 255 transitions, 2180 flow [2024-06-20 15:42:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:22,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:22,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:22,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:42:22,152 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:22,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash 23630041, now seen corresponding path program 2 times [2024-06-20 15:42:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158407522] [2024-06-20 15:42:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:23,266 INFO 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 15:42:23,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:23,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158407522] [2024-06-20 15:42:23,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158407522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:23,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:23,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:23,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754853900] [2024-06-20 15:42:23,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:23,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:23,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:23,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:23,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 255 transitions, 2180 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:23,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:23,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:23,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:23,936 INFO L124 PetriNetUnfolderBase]: 2277/3666 cut-off events. [2024-06-20 15:42:23,936 INFO L125 PetriNetUnfolderBase]: For 421288/421316 co-relation queries the response was YES. [2024-06-20 15:42:23,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32267 conditions, 3666 events. 2277/3666 cut-off events. For 421288/421316 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20341 event pairs, 546 based on Foata normal form. 29/3686 useless extension candidates. Maximal degree in co-relation 32179. Up to 3175 conditions per place. [2024-06-20 15:42:23,971 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 212 selfloop transitions, 28 changer transitions 0/274 dead transitions. [2024-06-20 15:42:23,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 274 transitions, 2970 flow [2024-06-20 15:42:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:42:23,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 15:42:23,972 INFO L175 Difference]: Start difference. First operand has 191 places, 255 transitions, 2180 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:42:23,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 274 transitions, 2970 flow [2024-06-20 15:42:24,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 274 transitions, 2864 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:24,309 INFO L231 Difference]: Finished difference. Result has 194 places, 263 transitions, 2320 flow [2024-06-20 15:42:24,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2320, PETRI_PLACES=194, PETRI_TRANSITIONS=263} [2024-06-20 15:42:24,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-20 15:42:24,309 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 263 transitions, 2320 flow [2024-06-20 15:42:24,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:24,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:24,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:24,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:42:24,310 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:24,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash 23362914, now seen corresponding path program 3 times [2024-06-20 15:42:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:24,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325279997] [2024-06-20 15:42:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:25,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325279997] [2024-06-20 15:42:25,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325279997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:25,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:25,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:25,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871128295] [2024-06-20 15:42:25,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:25,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:25,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:25,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 263 transitions, 2320 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:25,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:25,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:25,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:25,950 INFO L124 PetriNetUnfolderBase]: 2279/3672 cut-off events. [2024-06-20 15:42:25,950 INFO L125 PetriNetUnfolderBase]: For 433294/433322 co-relation queries the response was YES. [2024-06-20 15:42:25,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32740 conditions, 3672 events. 2279/3672 cut-off events. For 433294/433322 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20386 event pairs, 551 based on Foata normal form. 29/3691 useless extension candidates. Maximal degree in co-relation 32650. Up to 3168 conditions per place. [2024-06-20 15:42:25,990 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 26 changer transitions 0/278 dead transitions. [2024-06-20 15:42:25,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 278 transitions, 2908 flow [2024-06-20 15:42:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 15:42:25,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-20 15:42:25,991 INFO L175 Difference]: Start difference. First operand has 194 places, 263 transitions, 2320 flow. Second operand 7 states and 139 transitions. [2024-06-20 15:42:25,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 278 transitions, 2908 flow [2024-06-20 15:42:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 278 transitions, 2834 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 15:42:26,395 INFO L231 Difference]: Finished difference. Result has 198 places, 266 transitions, 2374 flow [2024-06-20 15:42:26,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2374, PETRI_PLACES=198, PETRI_TRANSITIONS=266} [2024-06-20 15:42:26,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-20 15:42:26,396 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 266 transitions, 2374 flow [2024-06-20 15:42:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:26,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:26,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:26,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:42:26,397 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:26,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash 23363131, now seen corresponding path program 3 times [2024-06-20 15:42:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:26,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25519338] [2024-06-20 15:42:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:26,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:27,559 INFO 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 15:42:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25519338] [2024-06-20 15:42:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25519338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:27,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95581879] [2024-06-20 15:42:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:27,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:27,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 266 transitions, 2374 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:27,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:27,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:27,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:28,289 INFO L124 PetriNetUnfolderBase]: 2282/3679 cut-off events. [2024-06-20 15:42:28,289 INFO L125 PetriNetUnfolderBase]: For 444525/444553 co-relation queries the response was YES. [2024-06-20 15:42:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33102 conditions, 3679 events. 2282/3679 cut-off events. For 444525/444553 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20477 event pairs, 551 based on Foata normal form. 30/3700 useless extension candidates. Maximal degree in co-relation 33010. Up to 3193 conditions per place. [2024-06-20 15:42:28,326 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 21 changer transitions 0/280 dead transitions. [2024-06-20 15:42:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 280 transitions, 2961 flow [2024-06-20 15:42:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 15:42:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-20 15:42:28,327 INFO L175 Difference]: Start difference. First operand has 198 places, 266 transitions, 2374 flow. Second operand 7 states and 136 transitions. [2024-06-20 15:42:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 280 transitions, 2961 flow [2024-06-20 15:42:28,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 280 transitions, 2823 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:28,661 INFO L231 Difference]: Finished difference. Result has 200 places, 269 transitions, 2352 flow [2024-06-20 15:42:28,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2352, PETRI_PLACES=200, PETRI_TRANSITIONS=269} [2024-06-20 15:42:28,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-20 15:42:28,661 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 269 transitions, 2352 flow [2024-06-20 15:42:28,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:28,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:28,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:42:28,662 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:28,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash -841181029, now seen corresponding path program 1 times [2024-06-20 15:42:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704030740] [2024-06-20 15:42:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:30,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704030740] [2024-06-20 15:42:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704030740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:30,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:30,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:42:30,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401643835] [2024-06-20 15:42:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:30,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:42:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:42:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:42:30,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:42:30,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 269 transitions, 2352 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:30,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:30,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:42:30,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:31,018 INFO L124 PetriNetUnfolderBase]: 2072/3422 cut-off events. [2024-06-20 15:42:31,018 INFO L125 PetriNetUnfolderBase]: For 448656/448674 co-relation queries the response was YES. [2024-06-20 15:42:31,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32191 conditions, 3422 events. 2072/3422 cut-off events. For 448656/448674 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19626 event pairs, 563 based on Foata normal form. 19/3412 useless extension candidates. Maximal degree in co-relation 32098. Up to 2814 conditions per place. [2024-06-20 15:42:31,051 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 187 selfloop transitions, 17 changer transitions 0/283 dead transitions. [2024-06-20 15:42:31,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 283 transitions, 2854 flow [2024-06-20 15:42:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:42:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:42:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:42:31,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:42:31,052 INFO L175 Difference]: Start difference. First operand has 200 places, 269 transitions, 2352 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:42:31,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 283 transitions, 2854 flow [2024-06-20 15:42:31,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 283 transitions, 2766 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:31,345 INFO L231 Difference]: Finished difference. Result has 203 places, 272 transitions, 2374 flow [2024-06-20 15:42:31,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2374, PETRI_PLACES=203, PETRI_TRANSITIONS=272} [2024-06-20 15:42:31,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-20 15:42:31,346 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 272 transitions, 2374 flow [2024-06-20 15:42:31,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:31,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:31,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:31,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:42:31,346 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:31,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash 897660783, now seen corresponding path program 1 times [2024-06-20 15:42:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89177957] [2024-06-20 15:42:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:32,379 INFO 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 15:42:32,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:32,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89177957] [2024-06-20 15:42:32,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89177957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:32,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:32,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:32,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863543130] [2024-06-20 15:42:32,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:32,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:32,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:32,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 272 transitions, 2374 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:32,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:32,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:32,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:33,600 INFO L124 PetriNetUnfolderBase]: 2701/4214 cut-off events. [2024-06-20 15:42:33,600 INFO L125 PetriNetUnfolderBase]: For 529307/529311 co-relation queries the response was YES. [2024-06-20 15:42:33,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38722 conditions, 4214 events. 2701/4214 cut-off events. For 529307/529311 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22903 event pairs, 484 based on Foata normal form. 20/4233 useless extension candidates. Maximal degree in co-relation 38628. Up to 3581 conditions per place. [2024-06-20 15:42:33,641 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 33 changer transitions 0/332 dead transitions. [2024-06-20 15:42:33,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 332 transitions, 3564 flow [2024-06-20 15:42:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:42:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:42:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 15:42:33,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-20 15:42:33,643 INFO L175 Difference]: Start difference. First operand has 203 places, 272 transitions, 2374 flow. Second operand 11 states and 219 transitions. [2024-06-20 15:42:33,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 332 transitions, 3564 flow [2024-06-20 15:42:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 332 transitions, 3446 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:34,013 INFO L231 Difference]: Finished difference. Result has 207 places, 274 transitions, 2422 flow [2024-06-20 15:42:34,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2422, PETRI_PLACES=207, PETRI_TRANSITIONS=274} [2024-06-20 15:42:34,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-20 15:42:34,014 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 274 transitions, 2422 flow [2024-06-20 15:42:34,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:34,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:34,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:34,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:42:34,014 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:34,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash 986374413, now seen corresponding path program 2 times [2024-06-20 15:42:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558425423] [2024-06-20 15:42:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:34,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:35,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:35,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558425423] [2024-06-20 15:42:35,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558425423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:35,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:35,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:35,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7861793] [2024-06-20 15:42:35,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:35,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:35,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:35,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:35,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 274 transitions, 2422 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:35,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:35,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:35,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:36,319 INFO L124 PetriNetUnfolderBase]: 2751/4306 cut-off events. [2024-06-20 15:42:36,319 INFO L125 PetriNetUnfolderBase]: For 545842/545846 co-relation queries the response was YES. [2024-06-20 15:42:36,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 4306 events. 2751/4306 cut-off events. For 545842/545846 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23512 event pairs, 651 based on Foata normal form. 24/4329 useless extension candidates. Maximal degree in co-relation 39366. Up to 3886 conditions per place. [2024-06-20 15:42:36,363 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 289 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-20 15:42:36,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 322 transitions, 3286 flow [2024-06-20 15:42:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 15:42:36,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:42:36,364 INFO L175 Difference]: Start difference. First operand has 207 places, 274 transitions, 2422 flow. Second operand 10 states and 195 transitions. [2024-06-20 15:42:36,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 322 transitions, 3286 flow [2024-06-20 15:42:36,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 322 transitions, 3203 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:36,744 INFO L231 Difference]: Finished difference. Result has 210 places, 275 transitions, 2452 flow [2024-06-20 15:42:36,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2452, PETRI_PLACES=210, PETRI_TRANSITIONS=275} [2024-06-20 15:42:36,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-20 15:42:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 275 transitions, 2452 flow [2024-06-20 15:42:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:36,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:36,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:36,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:42:36,745 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:36,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1187035251, now seen corresponding path program 3 times [2024-06-20 15:42:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:36,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731817595] [2024-06-20 15:42:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:37,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:37,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731817595] [2024-06-20 15:42:37,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731817595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:37,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:37,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4136860] [2024-06-20 15:42:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:37,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:37,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:37,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 275 transitions, 2452 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:37,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:37,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:37,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:38,998 INFO L124 PetriNetUnfolderBase]: 2723/4262 cut-off events. [2024-06-20 15:42:38,998 INFO L125 PetriNetUnfolderBase]: For 529677/529681 co-relation queries the response was YES. [2024-06-20 15:42:39,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38243 conditions, 4262 events. 2723/4262 cut-off events. For 529677/529681 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23217 event pairs, 611 based on Foata normal form. 20/4281 useless extension candidates. Maximal degree in co-relation 38147. Up to 3732 conditions per place. [2024-06-20 15:42:39,043 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 291 selfloop transitions, 30 changer transitions 0/326 dead transitions. [2024-06-20 15:42:39,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 326 transitions, 3302 flow [2024-06-20 15:42:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-20 15:42:39,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-20 15:42:39,044 INFO L175 Difference]: Start difference. First operand has 210 places, 275 transitions, 2452 flow. Second operand 10 states and 199 transitions. [2024-06-20 15:42:39,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 326 transitions, 3302 flow [2024-06-20 15:42:39,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 3209 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:39,439 INFO L231 Difference]: Finished difference. Result has 212 places, 275 transitions, 2425 flow [2024-06-20 15:42:39,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2425, PETRI_PLACES=212, PETRI_TRANSITIONS=275} [2024-06-20 15:42:39,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-20 15:42:39,440 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 275 transitions, 2425 flow [2024-06-20 15:42:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:39,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:39,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:39,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:42:39,440 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:39,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash 803721177, now seen corresponding path program 4 times [2024-06-20 15:42:39,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:39,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451993207] [2024-06-20 15:42:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:39,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:40,458 INFO 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 15:42:40,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451993207] [2024-06-20 15:42:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451993207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:40,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831091780] [2024-06-20 15:42:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:40,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:40,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 275 transitions, 2425 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:40,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:40,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:40,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:41,760 INFO L124 PetriNetUnfolderBase]: 2798/4396 cut-off events. [2024-06-20 15:42:41,760 INFO L125 PetriNetUnfolderBase]: For 551823/551830 co-relation queries the response was YES. [2024-06-20 15:42:41,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39083 conditions, 4396 events. 2798/4396 cut-off events. For 551823/551830 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 24324 event pairs, 597 based on Foata normal form. 24/4416 useless extension candidates. Maximal degree in co-relation 38986. Up to 3382 conditions per place. [2024-06-20 15:42:41,804 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 203 selfloop transitions, 115 changer transitions 0/323 dead transitions. [2024-06-20 15:42:41,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 323 transitions, 3293 flow [2024-06-20 15:42:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 15:42:41,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-20 15:42:41,805 INFO L175 Difference]: Start difference. First operand has 212 places, 275 transitions, 2425 flow. Second operand 10 states and 205 transitions. [2024-06-20 15:42:41,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 323 transitions, 3293 flow [2024-06-20 15:42:42,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 323 transitions, 3214 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:42,265 INFO L231 Difference]: Finished difference. Result has 213 places, 276 transitions, 2633 flow [2024-06-20 15:42:42,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2633, PETRI_PLACES=213, PETRI_TRANSITIONS=276} [2024-06-20 15:42:42,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-20 15:42:42,266 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 276 transitions, 2633 flow [2024-06-20 15:42:42,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:42,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:42,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:42,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:42:42,266 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:42,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash -946822057, now seen corresponding path program 5 times [2024-06-20 15:42:42,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:42,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992598049] [2024-06-20 15:42:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:42,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:43,291 INFO 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 15:42:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992598049] [2024-06-20 15:42:43,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992598049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:43,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:43,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063142698] [2024-06-20 15:42:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:43,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:43,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 276 transitions, 2633 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:43,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:43,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:43,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:44,689 INFO L124 PetriNetUnfolderBase]: 2873/4531 cut-off events. [2024-06-20 15:42:44,689 INFO L125 PetriNetUnfolderBase]: For 573937/573944 co-relation queries the response was YES. [2024-06-20 15:42:44,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40549 conditions, 4531 events. 2873/4531 cut-off events. For 573937/573944 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25441 event pairs, 621 based on Foata normal form. 24/4551 useless extension candidates. Maximal degree in co-relation 40451. Up to 3507 conditions per place. [2024-06-20 15:42:44,736 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 114 changer transitions 0/325 dead transitions. [2024-06-20 15:42:44,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 325 transitions, 3511 flow [2024-06-20 15:42:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-20 15:42:44,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-20 15:42:44,738 INFO L175 Difference]: Start difference. First operand has 213 places, 276 transitions, 2633 flow. Second operand 10 states and 207 transitions. [2024-06-20 15:42:44,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 325 transitions, 3511 flow [2024-06-20 15:42:45,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 325 transitions, 3254 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:45,226 INFO L231 Difference]: Finished difference. Result has 215 places, 277 transitions, 2663 flow [2024-06-20 15:42:45,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2663, PETRI_PLACES=215, PETRI_TRANSITIONS=277} [2024-06-20 15:42:45,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-20 15:42:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 277 transitions, 2663 flow [2024-06-20 15:42:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:45,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:45,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:45,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:42:45,227 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:45,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 798210927, now seen corresponding path program 6 times [2024-06-20 15:42:45,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:45,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089143702] [2024-06-20 15:42:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:45,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:46,247 INFO 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 15:42:46,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089143702] [2024-06-20 15:42:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089143702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:46,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840181934] [2024-06-20 15:42:46,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:46,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:46,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 277 transitions, 2663 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:46,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:46,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:46,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:47,574 INFO L124 PetriNetUnfolderBase]: 2931/4629 cut-off events. [2024-06-20 15:42:47,574 INFO L125 PetriNetUnfolderBase]: For 583915/583922 co-relation queries the response was YES. [2024-06-20 15:42:47,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41254 conditions, 4629 events. 2931/4629 cut-off events. For 583915/583922 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26122 event pairs, 607 based on Foata normal form. 20/4645 useless extension candidates. Maximal degree in co-relation 41155. Up to 3375 conditions per place. [2024-06-20 15:42:47,624 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 117 changer transitions 0/329 dead transitions. [2024-06-20 15:42:47,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 329 transitions, 3573 flow [2024-06-20 15:42:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-20 15:42:47,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-20 15:42:47,625 INFO L175 Difference]: Start difference. First operand has 215 places, 277 transitions, 2663 flow. Second operand 10 states and 209 transitions. [2024-06-20 15:42:47,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 329 transitions, 3573 flow [2024-06-20 15:42:48,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 329 transitions, 3316 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:48,154 INFO L231 Difference]: Finished difference. Result has 217 places, 278 transitions, 2700 flow [2024-06-20 15:42:48,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2700, PETRI_PLACES=217, PETRI_TRANSITIONS=278} [2024-06-20 15:42:48,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-20 15:42:48,155 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 278 transitions, 2700 flow [2024-06-20 15:42:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:48,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:48,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:42:48,156 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash -941244196, now seen corresponding path program 1 times [2024-06-20 15:42:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:48,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645567019] [2024-06-20 15:42:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:49,323 INFO 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 15:42:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645567019] [2024-06-20 15:42:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645567019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:49,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:49,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884872284] [2024-06-20 15:42:49,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:49,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:49,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:49,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:49,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 278 transitions, 2700 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:49,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:49,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:49,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:50,662 INFO L124 PetriNetUnfolderBase]: 2948/4651 cut-off events. [2024-06-20 15:42:50,662 INFO L125 PetriNetUnfolderBase]: For 577281/577288 co-relation queries the response was YES. [2024-06-20 15:42:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41454 conditions, 4651 events. 2948/4651 cut-off events. For 577281/577288 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26252 event pairs, 651 based on Foata normal form. 8/4655 useless extension candidates. Maximal degree in co-relation 41354. Up to 4031 conditions per place. [2024-06-20 15:42:50,709 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 225 selfloop transitions, 93 changer transitions 0/323 dead transitions. [2024-06-20 15:42:50,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 323 transitions, 3547 flow [2024-06-20 15:42:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 15:42:50,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-20 15:42:50,710 INFO L175 Difference]: Start difference. First operand has 217 places, 278 transitions, 2700 flow. Second operand 10 states and 197 transitions. [2024-06-20 15:42:50,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 323 transitions, 3547 flow [2024-06-20 15:42:51,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 323 transitions, 3271 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:51,249 INFO L231 Difference]: Finished difference. Result has 220 places, 283 transitions, 2710 flow [2024-06-20 15:42:51,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2710, PETRI_PLACES=220, PETRI_TRANSITIONS=283} [2024-06-20 15:42:51,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-20 15:42:51,249 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 283 transitions, 2710 flow [2024-06-20 15:42:51,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:51,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:51,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:42:51,250 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:51,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash -754708889, now seen corresponding path program 1 times [2024-06-20 15:42:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:51,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383682731] [2024-06-20 15:42:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:51,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:52,303 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 15:42:52,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:52,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383682731] [2024-06-20 15:42:52,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383682731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:52,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:52,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:42:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741923527] [2024-06-20 15:42:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:52,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:42:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:42:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:42:52,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:42:52,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 283 transitions, 2710 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:42:52,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:52,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:42:52,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:53,275 INFO L124 PetriNetUnfolderBase]: 2629/4284 cut-off events. [2024-06-20 15:42:53,275 INFO L125 PetriNetUnfolderBase]: For 579978/579986 co-relation queries the response was YES. [2024-06-20 15:42:53,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39605 conditions, 4284 events. 2629/4284 cut-off events. For 579978/579986 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25308 event pairs, 633 based on Foata normal form. 6/4227 useless extension candidates. Maximal degree in co-relation 39503. Up to 3691 conditions per place. [2024-06-20 15:42:53,323 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 230 selfloop transitions, 24 changer transitions 0/311 dead transitions. [2024-06-20 15:42:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 311 transitions, 3356 flow [2024-06-20 15:42:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:42:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:42:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 15:42:53,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-20 15:42:53,324 INFO L175 Difference]: Start difference. First operand has 220 places, 283 transitions, 2710 flow. Second operand 8 states and 161 transitions. [2024-06-20 15:42:53,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 311 transitions, 3356 flow [2024-06-20 15:42:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 311 transitions, 3117 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:53,792 INFO L231 Difference]: Finished difference. Result has 221 places, 286 transitions, 2585 flow [2024-06-20 15:42:53,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2585, PETRI_PLACES=221, PETRI_TRANSITIONS=286} [2024-06-20 15:42:53,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-20 15:42:53,792 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 286 transitions, 2585 flow [2024-06-20 15:42:53,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:42:53,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:53,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:53,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:42:53,793 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:53,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash -106976199, now seen corresponding path program 7 times [2024-06-20 15:42:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:53,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397209199] [2024-06-20 15:42:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:54,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:54,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397209199] [2024-06-20 15:42:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397209199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:54,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:54,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:54,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999018617] [2024-06-20 15:42:54,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:54,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:54,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:54,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 286 transitions, 2585 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:54,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:54,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:54,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:56,280 INFO L124 PetriNetUnfolderBase]: 3033/4805 cut-off events. [2024-06-20 15:42:56,280 INFO L125 PetriNetUnfolderBase]: For 640650/640653 co-relation queries the response was YES. [2024-06-20 15:42:56,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42935 conditions, 4805 events. 3033/4805 cut-off events. For 640650/640653 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27521 event pairs, 643 based on Foata normal form. 20/4821 useless extension candidates. Maximal degree in co-relation 42832. Up to 3771 conditions per place. [2024-06-20 15:42:56,331 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 220 selfloop transitions, 108 changer transitions 0/333 dead transitions. [2024-06-20 15:42:56,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 333 transitions, 3491 flow [2024-06-20 15:42:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 15:42:56,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-20 15:42:56,332 INFO L175 Difference]: Start difference. First operand has 221 places, 286 transitions, 2585 flow. Second operand 10 states and 205 transitions. [2024-06-20 15:42:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 333 transitions, 3491 flow [2024-06-20 15:42:56,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 333 transitions, 3399 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:42:56,911 INFO L231 Difference]: Finished difference. Result has 225 places, 287 transitions, 2774 flow [2024-06-20 15:42:56,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2774, PETRI_PLACES=225, PETRI_TRANSITIONS=287} [2024-06-20 15:42:56,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-20 15:42:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 287 transitions, 2774 flow [2024-06-20 15:42:56,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:56,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:56,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:56,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:42:56,912 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:56,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1105131375, now seen corresponding path program 8 times [2024-06-20 15:42:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:56,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680895682] [2024-06-20 15:42:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:57,928 INFO 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 15:42:57,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:57,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680895682] [2024-06-20 15:42:57,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680895682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:57,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:57,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:42:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164408588] [2024-06-20 15:42:57,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:42:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:42:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:42:58,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:58,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 287 transitions, 2774 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:42:58,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:58,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:58,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:59,307 INFO L124 PetriNetUnfolderBase]: 3202/5084 cut-off events. [2024-06-20 15:42:59,307 INFO L125 PetriNetUnfolderBase]: For 706080/706083 co-relation queries the response was YES. [2024-06-20 15:42:59,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47067 conditions, 5084 events. 3202/5084 cut-off events. For 706080/706083 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29551 event pairs, 657 based on Foata normal form. 16/5096 useless extension candidates. Maximal degree in co-relation 46963. Up to 3759 conditions per place. [2024-06-20 15:42:59,360 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 224 selfloop transitions, 111 changer transitions 0/340 dead transitions. [2024-06-20 15:42:59,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 340 transitions, 4032 flow [2024-06-20 15:42:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-20 15:42:59,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-20 15:42:59,361 INFO L175 Difference]: Start difference. First operand has 225 places, 287 transitions, 2774 flow. Second operand 10 states and 209 transitions. [2024-06-20 15:42:59,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 340 transitions, 4032 flow [2024-06-20 15:43:00,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 340 transitions, 3781 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:00,079 INFO L231 Difference]: Finished difference. Result has 227 places, 289 transitions, 2869 flow [2024-06-20 15:43:00,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2869, PETRI_PLACES=227, PETRI_TRANSITIONS=289} [2024-06-20 15:43:00,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-20 15:43:00,080 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 289 transitions, 2869 flow [2024-06-20 15:43:00,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:00,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:00,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:00,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:43:00,080 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:00,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1110641625, now seen corresponding path program 9 times [2024-06-20 15:43:00,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:00,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709835112] [2024-06-20 15:43:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:01,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709835112] [2024-06-20 15:43:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709835112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:01,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:01,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989933453] [2024-06-20 15:43:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:01,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:01,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:01,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 289 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:01,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:01,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:01,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:02,687 INFO L124 PetriNetUnfolderBase]: 3277/5214 cut-off events. [2024-06-20 15:43:02,687 INFO L125 PetriNetUnfolderBase]: For 736337/736340 co-relation queries the response was YES. [2024-06-20 15:43:02,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48113 conditions, 5214 events. 3277/5214 cut-off events. For 736337/736340 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 30547 event pairs, 692 based on Foata normal form. 20/5230 useless extension candidates. Maximal degree in co-relation 48008. Up to 4175 conditions per place. [2024-06-20 15:43:02,741 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 224 selfloop transitions, 107 changer transitions 0/336 dead transitions. [2024-06-20 15:43:02,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 336 transitions, 3785 flow [2024-06-20 15:43:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 15:43:02,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-20 15:43:02,742 INFO L175 Difference]: Start difference. First operand has 227 places, 289 transitions, 2869 flow. Second operand 10 states and 206 transitions. [2024-06-20 15:43:02,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 336 transitions, 3785 flow [2024-06-20 15:43:03,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 336 transitions, 3595 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:03,536 INFO L231 Difference]: Finished difference. Result has 231 places, 290 transitions, 2962 flow [2024-06-20 15:43:03,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2962, PETRI_PLACES=231, PETRI_TRANSITIONS=290} [2024-06-20 15:43:03,537 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-20 15:43:03,537 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 290 transitions, 2962 flow [2024-06-20 15:43:03,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:03,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:03,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:43:03,537 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:03,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1304581035, now seen corresponding path program 10 times [2024-06-20 15:43:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884650186] [2024-06-20 15:43:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:04,565 INFO 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 15:43:04,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:04,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884650186] [2024-06-20 15:43:04,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884650186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:04,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:04,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:04,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465938463] [2024-06-20 15:43:04,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:04,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:04,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:04,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:04,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 290 transitions, 2962 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:04,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:04,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:04,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:06,040 INFO L124 PetriNetUnfolderBase]: 3241/5153 cut-off events. [2024-06-20 15:43:06,040 INFO L125 PetriNetUnfolderBase]: For 701688/701691 co-relation queries the response was YES. [2024-06-20 15:43:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46432 conditions, 5153 events. 3241/5153 cut-off events. For 701688/701691 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30120 event pairs, 674 based on Foata normal form. 20/5169 useless extension candidates. Maximal degree in co-relation 46325. Up to 4119 conditions per place. [2024-06-20 15:43:06,098 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 217 selfloop transitions, 112 changer transitions 0/334 dead transitions. [2024-06-20 15:43:06,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 334 transitions, 3802 flow [2024-06-20 15:43:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-20 15:43:06,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-20 15:43:06,099 INFO L175 Difference]: Start difference. First operand has 231 places, 290 transitions, 2962 flow. Second operand 10 states and 203 transitions. [2024-06-20 15:43:06,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 334 transitions, 3802 flow [2024-06-20 15:43:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 334 transitions, 3535 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:06,808 INFO L231 Difference]: Finished difference. Result has 233 places, 290 transitions, 2926 flow [2024-06-20 15:43:06,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2926, PETRI_PLACES=233, PETRI_TRANSITIONS=290} [2024-06-20 15:43:06,809 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-20 15:43:06,809 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 290 transitions, 2926 flow [2024-06-20 15:43:06,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:06,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:06,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:06,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:43:06,809 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:06,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 924152944, now seen corresponding path program 1 times [2024-06-20 15:43:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:06,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325954469] [2024-06-20 15:43:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:07,587 INFO 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 15:43:07,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:07,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325954469] [2024-06-20 15:43:07,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325954469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:07,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:07,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93169610] [2024-06-20 15:43:07,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:07,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:07,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:07,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 290 transitions, 2926 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:07,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:07,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:07,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:08,642 INFO L124 PetriNetUnfolderBase]: 3246/5180 cut-off events. [2024-06-20 15:43:08,642 INFO L125 PetriNetUnfolderBase]: For 669799/669806 co-relation queries the response was YES. [2024-06-20 15:43:08,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46265 conditions, 5180 events. 3246/5180 cut-off events. For 669799/669806 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30520 event pairs, 731 based on Foata normal form. 7/5185 useless extension candidates. Maximal degree in co-relation 46157. Up to 4873 conditions per place. [2024-06-20 15:43:08,702 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 27 changer transitions 0/314 dead transitions. [2024-06-20 15:43:08,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 314 transitions, 3692 flow [2024-06-20 15:43:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:43:08,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-20 15:43:08,703 INFO L175 Difference]: Start difference. First operand has 233 places, 290 transitions, 2926 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:43:08,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 314 transitions, 3692 flow [2024-06-20 15:43:09,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 314 transitions, 3453 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:43:09,224 INFO L231 Difference]: Finished difference. Result has 231 places, 293 transitions, 2830 flow [2024-06-20 15:43:09,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2830, PETRI_PLACES=231, PETRI_TRANSITIONS=293} [2024-06-20 15:43:09,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-20 15:43:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 293 transitions, 2830 flow [2024-06-20 15:43:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:09,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:09,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:43:09,225 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:09,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash 789965172, now seen corresponding path program 2 times [2024-06-20 15:43:09,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:09,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635798476] [2024-06-20 15:43:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:10,064 INFO 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 15:43:10,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:10,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635798476] [2024-06-20 15:43:10,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635798476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:10,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:10,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:10,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263294330] [2024-06-20 15:43:10,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:10,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:10,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:10,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:10,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 293 transitions, 2830 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:10,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:10,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:10,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:11,175 INFO L124 PetriNetUnfolderBase]: 3259/5199 cut-off events. [2024-06-20 15:43:11,176 INFO L125 PetriNetUnfolderBase]: For 688343/688350 co-relation queries the response was YES. [2024-06-20 15:43:11,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46577 conditions, 5199 events. 3259/5199 cut-off events. For 688343/688350 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30686 event pairs, 749 based on Foata normal form. 7/5204 useless extension candidates. Maximal degree in co-relation 46468. Up to 4877 conditions per place. [2024-06-20 15:43:11,224 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 277 selfloop transitions, 35 changer transitions 0/317 dead transitions. [2024-06-20 15:43:11,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 317 transitions, 3830 flow [2024-06-20 15:43:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 15:43:11,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-20 15:43:11,225 INFO L175 Difference]: Start difference. First operand has 231 places, 293 transitions, 2830 flow. Second operand 7 states and 131 transitions. [2024-06-20 15:43:11,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 317 transitions, 3830 flow [2024-06-20 15:43:11,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 317 transitions, 3711 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:11,805 INFO L231 Difference]: Finished difference. Result has 233 places, 299 transitions, 2957 flow [2024-06-20 15:43:11,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2957, PETRI_PLACES=233, PETRI_TRANSITIONS=299} [2024-06-20 15:43:11,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-20 15:43:11,805 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 299 transitions, 2957 flow [2024-06-20 15:43:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:11,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:11,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:11,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:43:11,806 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:11,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1110857106, now seen corresponding path program 2 times [2024-06-20 15:43:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:11,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478610575] [2024-06-20 15:43:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:12,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478610575] [2024-06-20 15:43:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478610575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592700357] [2024-06-20 15:43:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:13,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:13,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 299 transitions, 2957 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:13,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:13,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:13,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:14,412 INFO L124 PetriNetUnfolderBase]: 3276/5225 cut-off events. [2024-06-20 15:43:14,412 INFO L125 PetriNetUnfolderBase]: For 715914/715917 co-relation queries the response was YES. [2024-06-20 15:43:14,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47242 conditions, 5225 events. 3276/5225 cut-off events. For 715914/715917 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30806 event pairs, 726 based on Foata normal form. 4/5225 useless extension candidates. Maximal degree in co-relation 47132. Up to 4570 conditions per place. [2024-06-20 15:43:14,467 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 87 changer transitions 0/342 dead transitions. [2024-06-20 15:43:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 342 transitions, 3845 flow [2024-06-20 15:43:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 15:43:14,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-20 15:43:14,468 INFO L175 Difference]: Start difference. First operand has 233 places, 299 transitions, 2957 flow. Second operand 10 states and 197 transitions. [2024-06-20 15:43:14,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 342 transitions, 3845 flow [2024-06-20 15:43:15,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 342 transitions, 3727 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:15,128 INFO L231 Difference]: Finished difference. Result has 241 places, 304 transitions, 3120 flow [2024-06-20 15:43:15,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3120, PETRI_PLACES=241, PETRI_TRANSITIONS=304} [2024-06-20 15:43:15,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-20 15:43:15,129 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 304 transitions, 3120 flow [2024-06-20 15:43:15,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:15,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:15,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:15,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:43:15,129 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:15,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1312205826, now seen corresponding path program 3 times [2024-06-20 15:43:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:15,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028574635] [2024-06-20 15:43:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:16,326 INFO 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 15:43:16,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:16,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028574635] [2024-06-20 15:43:16,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028574635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:16,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:16,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:16,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745306138] [2024-06-20 15:43:16,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:16,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:16,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:16,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:16,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 304 transitions, 3120 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:16,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:16,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:16,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:17,871 INFO L124 PetriNetUnfolderBase]: 3304/5263 cut-off events. [2024-06-20 15:43:17,871 INFO L125 PetriNetUnfolderBase]: For 736683/736686 co-relation queries the response was YES. [2024-06-20 15:43:17,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48506 conditions, 5263 events. 3304/5263 cut-off events. For 736683/736686 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 31004 event pairs, 711 based on Foata normal form. 4/5263 useless extension candidates. Maximal degree in co-relation 48393. Up to 4609 conditions per place. [2024-06-20 15:43:17,923 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 97 changer transitions 0/348 dead transitions. [2024-06-20 15:43:17,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 4047 flow [2024-06-20 15:43:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 15:43:17,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:43:17,925 INFO L175 Difference]: Start difference. First operand has 241 places, 304 transitions, 3120 flow. Second operand 10 states and 195 transitions. [2024-06-20 15:43:17,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 4047 flow [2024-06-20 15:43:18,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 3800 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 15:43:18,474 INFO L231 Difference]: Finished difference. Result has 245 places, 312 transitions, 3224 flow [2024-06-20 15:43:18,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3224, PETRI_PLACES=245, PETRI_TRANSITIONS=312} [2024-06-20 15:43:18,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-20 15:43:18,474 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 312 transitions, 3224 flow [2024-06-20 15:43:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:18,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:18,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:18,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:43:18,475 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:18,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 99959682, now seen corresponding path program 4 times [2024-06-20 15:43:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787873947] [2024-06-20 15:43:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:19,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:19,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787873947] [2024-06-20 15:43:19,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787873947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:19,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:19,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:19,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194985777] [2024-06-20 15:43:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:19,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:19,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:19,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 312 transitions, 3224 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:19,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:19,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:21,170 INFO L124 PetriNetUnfolderBase]: 3346/5334 cut-off events. [2024-06-20 15:43:21,171 INFO L125 PetriNetUnfolderBase]: For 770152/770155 co-relation queries the response was YES. [2024-06-20 15:43:21,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49981 conditions, 5334 events. 3346/5334 cut-off events. For 770152/770155 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31575 event pairs, 714 based on Foata normal form. 4/5334 useless extension candidates. Maximal degree in co-relation 49866. Up to 4574 conditions per place. [2024-06-20 15:43:21,231 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 106 changer transitions 0/355 dead transitions. [2024-06-20 15:43:21,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 355 transitions, 4476 flow [2024-06-20 15:43:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-20 15:43:21,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-20 15:43:21,232 INFO L175 Difference]: Start difference. First operand has 245 places, 312 transitions, 3224 flow. Second operand 10 states and 198 transitions. [2024-06-20 15:43:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 355 transitions, 4476 flow [2024-06-20 15:43:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 355 transitions, 4248 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:21,792 INFO L231 Difference]: Finished difference. Result has 250 places, 316 transitions, 3375 flow [2024-06-20 15:43:21,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3375, PETRI_PLACES=250, PETRI_TRANSITIONS=316} [2024-06-20 15:43:21,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-20 15:43:21,793 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 316 transitions, 3375 flow [2024-06-20 15:43:21,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:21,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:21,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:43:21,793 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:21,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash 92541072, now seen corresponding path program 5 times [2024-06-20 15:43:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:21,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358268107] [2024-06-20 15:43:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:21,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:22,933 INFO 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 15:43:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358268107] [2024-06-20 15:43:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358268107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:22,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:22,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676076641] [2024-06-20 15:43:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:22,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:23,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:23,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 316 transitions, 3375 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:23,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:23,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:23,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:24,400 INFO L124 PetriNetUnfolderBase]: 3338/5317 cut-off events. [2024-06-20 15:43:24,400 INFO L125 PetriNetUnfolderBase]: For 774877/774880 co-relation queries the response was YES. [2024-06-20 15:43:24,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49394 conditions, 5317 events. 3338/5317 cut-off events. For 774877/774880 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31407 event pairs, 721 based on Foata normal form. 4/5317 useless extension candidates. Maximal degree in co-relation 49278. Up to 4663 conditions per place. [2024-06-20 15:43:24,462 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 252 selfloop transitions, 95 changer transitions 0/352 dead transitions. [2024-06-20 15:43:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 352 transitions, 4183 flow [2024-06-20 15:43:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:43:24,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 15:43:24,463 INFO L175 Difference]: Start difference. First operand has 250 places, 316 transitions, 3375 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:43:24,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 352 transitions, 4183 flow [2024-06-20 15:43:25,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 352 transitions, 3941 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:25,064 INFO L231 Difference]: Finished difference. Result has 254 places, 316 transitions, 3330 flow [2024-06-20 15:43:25,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3330, PETRI_PLACES=254, PETRI_TRANSITIONS=316} [2024-06-20 15:43:25,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-20 15:43:25,065 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 316 transitions, 3330 flow [2024-06-20 15:43:25,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:25,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:25,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:25,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:43:25,065 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:25,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash 789960615, now seen corresponding path program 2 times [2024-06-20 15:43:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:25,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618346615] [2024-06-20 15:43:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:25,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618346615] [2024-06-20 15:43:26,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618346615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:26,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:26,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:26,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274902061] [2024-06-20 15:43:26,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:26,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:43:26,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 316 transitions, 3330 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:43:26,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:26,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:43:26,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:27,410 INFO L124 PetriNetUnfolderBase]: 3014/4966 cut-off events. [2024-06-20 15:43:27,410 INFO L125 PetriNetUnfolderBase]: For 792626/792636 co-relation queries the response was YES. [2024-06-20 15:43:27,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47504 conditions, 4966 events. 3014/4966 cut-off events. For 792626/792636 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30747 event pairs, 706 based on Foata normal form. 7/4915 useless extension candidates. Maximal degree in co-relation 47386. Up to 4275 conditions per place. [2024-06-20 15:43:27,567 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 242 selfloop transitions, 28 changer transitions 0/337 dead transitions. [2024-06-20 15:43:27,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 337 transitions, 3986 flow [2024-06-20 15:43:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:43:27,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:43:27,568 INFO L175 Difference]: Start difference. First operand has 254 places, 316 transitions, 3330 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:43:27,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 337 transitions, 3986 flow [2024-06-20 15:43:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 337 transitions, 3736 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 15:43:28,368 INFO L231 Difference]: Finished difference. Result has 251 places, 319 transitions, 3208 flow [2024-06-20 15:43:28,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3080, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3208, PETRI_PLACES=251, PETRI_TRANSITIONS=319} [2024-06-20 15:43:28,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-20 15:43:28,369 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 319 transitions, 3208 flow [2024-06-20 15:43:28,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:43:28,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:28,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:43:28,369 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:28,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash -754320614, now seen corresponding path program 1 times [2024-06-20 15:43:28,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:28,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447213546] [2024-06-20 15:43:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:28,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447213546] [2024-06-20 15:43:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447213546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:29,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070478654] [2024-06-20 15:43:29,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:29,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:43:29,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 319 transitions, 3208 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:43:29,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:29,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:43:29,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:30,697 INFO L124 PetriNetUnfolderBase]: 3017/4953 cut-off events. [2024-06-20 15:43:30,697 INFO L125 PetriNetUnfolderBase]: For 806166/806178 co-relation queries the response was YES. [2024-06-20 15:43:30,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47820 conditions, 4953 events. 3017/4953 cut-off events. For 806166/806178 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30529 event pairs, 681 based on Foata normal form. 8/4901 useless extension candidates. Maximal degree in co-relation 47703. Up to 4325 conditions per place. [2024-06-20 15:43:30,753 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 255 selfloop transitions, 19 changer transitions 0/341 dead transitions. [2024-06-20 15:43:30,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 341 transitions, 3888 flow [2024-06-20 15:43:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:43:30,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:43:30,754 INFO L175 Difference]: Start difference. First operand has 251 places, 319 transitions, 3208 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:43:30,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 341 transitions, 3888 flow [2024-06-20 15:43:31,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 341 transitions, 3782 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:31,508 INFO L231 Difference]: Finished difference. Result has 253 places, 322 transitions, 3220 flow [2024-06-20 15:43:31,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3220, PETRI_PLACES=253, PETRI_TRANSITIONS=322} [2024-06-20 15:43:31,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-20 15:43:31,509 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 322 transitions, 3220 flow [2024-06-20 15:43:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:43:31,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:31,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:31,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:43:31,509 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:31,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash -750158557, now seen corresponding path program 3 times [2024-06-20 15:43:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10480448] [2024-06-20 15:43:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:32,666 INFO 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 15:43:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10480448] [2024-06-20 15:43:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10480448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:32,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625371396] [2024-06-20 15:43:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:32,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:43:32,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 322 transitions, 3220 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:43:32,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:32,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:43:32,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:33,765 INFO L124 PetriNetUnfolderBase]: 3025/4967 cut-off events. [2024-06-20 15:43:33,765 INFO L125 PetriNetUnfolderBase]: For 822926/822934 co-relation queries the response was YES. [2024-06-20 15:43:33,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48374 conditions, 4967 events. 3025/4967 cut-off events. For 822926/822934 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30631 event pairs, 681 based on Foata normal form. 10/4917 useless extension candidates. Maximal degree in co-relation 48256. Up to 4280 conditions per place. [2024-06-20 15:43:33,825 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 240 selfloop transitions, 36 changer transitions 0/343 dead transitions. [2024-06-20 15:43:33,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 343 transitions, 3896 flow [2024-06-20 15:43:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:43:33,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:43:33,827 INFO L175 Difference]: Start difference. First operand has 253 places, 322 transitions, 3220 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:43:33,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 343 transitions, 3896 flow [2024-06-20 15:43:34,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 343 transitions, 3802 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:34,776 INFO L231 Difference]: Finished difference. Result has 255 places, 325 transitions, 3278 flow [2024-06-20 15:43:34,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3126, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3278, PETRI_PLACES=255, PETRI_TRANSITIONS=325} [2024-06-20 15:43:34,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-20 15:43:34,777 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 325 transitions, 3278 flow [2024-06-20 15:43:34,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:43:34,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:34,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:34,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:43:34,777 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:34,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1896853443, now seen corresponding path program 11 times [2024-06-20 15:43:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:34,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480983367] [2024-06-20 15:43:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:35,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:35,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480983367] [2024-06-20 15:43:35,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480983367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:35,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54303066] [2024-06-20 15:43:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:35,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:35,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:35,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 325 transitions, 3278 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:35,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:35,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:35,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:37,362 INFO L124 PetriNetUnfolderBase]: 3443/5477 cut-off events. [2024-06-20 15:43:37,362 INFO L125 PetriNetUnfolderBase]: For 894267/894267 co-relation queries the response was YES. [2024-06-20 15:43:37,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52294 conditions, 5477 events. 3443/5477 cut-off events. For 894267/894267 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32427 event pairs, 687 based on Foata normal form. 20/5489 useless extension candidates. Maximal degree in co-relation 52175. Up to 4426 conditions per place. [2024-06-20 15:43:37,427 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 123 changer transitions 0/366 dead transitions. [2024-06-20 15:43:37,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 366 transitions, 4236 flow [2024-06-20 15:43:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-20 15:43:37,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-20 15:43:37,428 INFO L175 Difference]: Start difference. First operand has 255 places, 325 transitions, 3278 flow. Second operand 10 states and 198 transitions. [2024-06-20 15:43:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 366 transitions, 4236 flow [2024-06-20 15:43:38,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 366 transitions, 4106 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:38,229 INFO L231 Difference]: Finished difference. Result has 259 places, 326 transitions, 3469 flow [2024-06-20 15:43:38,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3469, PETRI_PLACES=259, PETRI_TRANSITIONS=326} [2024-06-20 15:43:38,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-20 15:43:38,229 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 326 transitions, 3469 flow [2024-06-20 15:43:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:38,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:38,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:38,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:43:38,229 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:38,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1443157619, now seen corresponding path program 12 times [2024-06-20 15:43:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:38,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457442650] [2024-06-20 15:43:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:39,254 INFO 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 15:43:39,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457442650] [2024-06-20 15:43:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457442650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:39,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:39,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041592177] [2024-06-20 15:43:39,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:39,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:39,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:39,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 326 transitions, 3469 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:39,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:39,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:40,897 INFO L124 PetriNetUnfolderBase]: 3518/5607 cut-off events. [2024-06-20 15:43:40,897 INFO L125 PetriNetUnfolderBase]: For 926799/926799 co-relation queries the response was YES. [2024-06-20 15:43:40,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54052 conditions, 5607 events. 3518/5607 cut-off events. For 926799/926799 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 33474 event pairs, 697 based on Foata normal form. 20/5619 useless extension candidates. Maximal degree in co-relation 53932. Up to 4551 conditions per place. [2024-06-20 15:43:40,978 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 111 changer transitions 0/370 dead transitions. [2024-06-20 15:43:40,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 370 transitions, 4455 flow [2024-06-20 15:43:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 15:43:40,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-20 15:43:40,979 INFO L175 Difference]: Start difference. First operand has 259 places, 326 transitions, 3469 flow. Second operand 10 states and 202 transitions. [2024-06-20 15:43:40,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 370 transitions, 4455 flow [2024-06-20 15:43:41,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 370 transitions, 4164 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:41,808 INFO L231 Difference]: Finished difference. Result has 261 places, 327 transitions, 3477 flow [2024-06-20 15:43:41,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3477, PETRI_PLACES=261, PETRI_TRANSITIONS=327} [2024-06-20 15:43:41,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-20 15:43:41,808 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 327 transitions, 3477 flow [2024-06-20 15:43:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:41,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:41,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:41,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:43:41,808 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:41,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1249218209, now seen corresponding path program 13 times [2024-06-20 15:43:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:41,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863559479] [2024-06-20 15:43:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:41,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:42,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863559479] [2024-06-20 15:43:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863559479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:42,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055280592] [2024-06-20 15:43:42,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:42,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:42,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:42,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 327 transitions, 3477 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:42,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:42,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:42,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:44,406 INFO L124 PetriNetUnfolderBase]: 3593/5732 cut-off events. [2024-06-20 15:43:44,406 INFO L125 PetriNetUnfolderBase]: For 950829/950829 co-relation queries the response was YES. [2024-06-20 15:43:44,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54985 conditions, 5732 events. 3593/5732 cut-off events. For 950829/950829 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34426 event pairs, 705 based on Foata normal form. 20/5744 useless extension candidates. Maximal degree in co-relation 54864. Up to 4676 conditions per place. [2024-06-20 15:43:44,478 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 252 selfloop transitions, 114 changer transitions 0/371 dead transitions. [2024-06-20 15:43:44,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 371 transitions, 4467 flow [2024-06-20 15:43:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-20 15:43:44,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-20 15:43:44,479 INFO L175 Difference]: Start difference. First operand has 261 places, 327 transitions, 3477 flow. Second operand 10 states and 201 transitions. [2024-06-20 15:43:44,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 371 transitions, 4467 flow [2024-06-20 15:43:45,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 371 transitions, 4198 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:45,518 INFO L231 Difference]: Finished difference. Result has 263 places, 328 transitions, 3515 flow [2024-06-20 15:43:45,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3515, PETRI_PLACES=263, PETRI_TRANSITIONS=328} [2024-06-20 15:43:45,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-20 15:43:45,518 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 328 transitions, 3515 flow [2024-06-20 15:43:45,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:45,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:45,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:43:45,519 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:45,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1243855829, now seen corresponding path program 14 times [2024-06-20 15:43:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:45,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042118706] [2024-06-20 15:43:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:45,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:46,531 INFO 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 15:43:46,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:46,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042118706] [2024-06-20 15:43:46,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042118706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:46,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:46,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:46,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378903029] [2024-06-20 15:43:46,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:46,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:46,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:46,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:46,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 328 transitions, 3515 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:46,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:46,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:46,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:48,204 INFO L124 PetriNetUnfolderBase]: 3668/5862 cut-off events. [2024-06-20 15:43:48,204 INFO L125 PetriNetUnfolderBase]: For 975169/975169 co-relation queries the response was YES. [2024-06-20 15:43:48,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55996 conditions, 5862 events. 3668/5862 cut-off events. For 975169/975169 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35459 event pairs, 724 based on Foata normal form. 20/5874 useless extension candidates. Maximal degree in co-relation 55874. Up to 4801 conditions per place. [2024-06-20 15:43:48,268 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 251 selfloop transitions, 116 changer transitions 0/372 dead transitions. [2024-06-20 15:43:48,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 372 transitions, 4509 flow [2024-06-20 15:43:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-20 15:43:48,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:43:48,269 INFO L175 Difference]: Start difference. First operand has 263 places, 328 transitions, 3515 flow. Second operand 10 states and 200 transitions. [2024-06-20 15:43:48,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 372 transitions, 4509 flow [2024-06-20 15:43:49,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 372 transitions, 4232 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:49,189 INFO L231 Difference]: Finished difference. Result has 265 places, 329 transitions, 3551 flow [2024-06-20 15:43:49,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3551, PETRI_PLACES=265, PETRI_TRANSITIONS=329} [2024-06-20 15:43:49,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-20 15:43:49,189 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 329 transitions, 3551 flow [2024-06-20 15:43:49,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:49,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:49,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:49,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:43:49,190 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:49,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1243707959, now seen corresponding path program 15 times [2024-06-20 15:43:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:49,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503523277] [2024-06-20 15:43:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:49,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:50,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503523277] [2024-06-20 15:43:50,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503523277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:50,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:50,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:50,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435717684] [2024-06-20 15:43:50,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:50,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:50,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:50,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:50,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 329 transitions, 3551 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:50,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:50,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:50,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:51,951 INFO L124 PetriNetUnfolderBase]: 3676/5887 cut-off events. [2024-06-20 15:43:51,951 INFO L125 PetriNetUnfolderBase]: For 955166/955166 co-relation queries the response was YES. [2024-06-20 15:43:51,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55346 conditions, 5887 events. 3676/5887 cut-off events. For 955166/955166 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35681 event pairs, 701 based on Foata normal form. 16/5895 useless extension candidates. Maximal degree in co-relation 55223. Up to 4351 conditions per place. [2024-06-20 15:43:52,026 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 121 changer transitions 0/376 dead transitions. [2024-06-20 15:43:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 376 transitions, 4577 flow [2024-06-20 15:43:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 15:43:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-20 15:43:52,027 INFO L175 Difference]: Start difference. First operand has 265 places, 329 transitions, 3551 flow. Second operand 10 states and 202 transitions. [2024-06-20 15:43:52,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 376 transitions, 4577 flow [2024-06-20 15:43:52,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 376 transitions, 4294 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:52,874 INFO L231 Difference]: Finished difference. Result has 267 places, 330 transitions, 3592 flow [2024-06-20 15:43:52,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3592, PETRI_PLACES=267, PETRI_TRANSITIONS=330} [2024-06-20 15:43:52,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-20 15:43:52,874 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 330 transitions, 3592 flow [2024-06-20 15:43:52,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:43:52,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:52,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:43:52,874 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:52,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1400379020, now seen corresponding path program 3 times [2024-06-20 15:43:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800394182] [2024-06-20 15:43:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800394182] [2024-06-20 15:43:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800394182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:53,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:53,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100564842] [2024-06-20 15:43:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:53,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:53,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 330 transitions, 3592 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:53,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:53,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:53,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:54,895 INFO L124 PetriNetUnfolderBase]: 3673/5891 cut-off events. [2024-06-20 15:43:54,895 INFO L125 PetriNetUnfolderBase]: For 917148/917161 co-relation queries the response was YES. [2024-06-20 15:43:54,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55045 conditions, 5891 events. 3673/5891 cut-off events. For 917148/917161 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35899 event pairs, 807 based on Foata normal form. 11/5899 useless extension candidates. Maximal degree in co-relation 54921. Up to 5573 conditions per place. [2024-06-20 15:43:54,962 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 317 selfloop transitions, 27 changer transitions 0/349 dead transitions. [2024-06-20 15:43:54,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 349 transitions, 4348 flow [2024-06-20 15:43:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 15:43:54,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:43:54,963 INFO L175 Difference]: Start difference. First operand has 267 places, 330 transitions, 3592 flow. Second operand 7 states and 129 transitions. [2024-06-20 15:43:54,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 349 transitions, 4348 flow [2024-06-20 15:43:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 349 transitions, 3998 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:55,891 INFO L231 Difference]: Finished difference. Result has 266 places, 330 transitions, 3303 flow [2024-06-20 15:43:55,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3303, PETRI_PLACES=266, PETRI_TRANSITIONS=330} [2024-06-20 15:43:55,892 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-20 15:43:55,892 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 330 transitions, 3303 flow [2024-06-20 15:43:55,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:55,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:55,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:55,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:43:55,892 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:55,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1387046540, now seen corresponding path program 4 times [2024-06-20 15:43:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777535482] [2024-06-20 15:43:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:56,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777535482] [2024-06-20 15:43:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777535482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:56,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023091053] [2024-06-20 15:43:56,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:56,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:56,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:56,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 330 transitions, 3303 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:56,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:56,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:56,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:57,923 INFO L124 PetriNetUnfolderBase]: 3678/5897 cut-off events. [2024-06-20 15:43:57,923 INFO L125 PetriNetUnfolderBase]: For 924669/924682 co-relation queries the response was YES. [2024-06-20 15:43:57,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54318 conditions, 5897 events. 3678/5897 cut-off events. For 924669/924682 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35938 event pairs, 807 based on Foata normal form. 11/5905 useless extension candidates. Maximal degree in co-relation 54193. Up to 5569 conditions per place. [2024-06-20 15:43:57,992 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 309 selfloop transitions, 35 changer transitions 0/349 dead transitions. [2024-06-20 15:43:57,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 349 transitions, 4137 flow [2024-06-20 15:43:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 15:43:57,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-20 15:43:57,993 INFO L175 Difference]: Start difference. First operand has 266 places, 330 transitions, 3303 flow. Second operand 7 states and 127 transitions. [2024-06-20 15:43:57,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 349 transitions, 4137 flow [2024-06-20 15:43:58,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 349 transitions, 4061 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:58,880 INFO L231 Difference]: Finished difference. Result has 267 places, 333 transitions, 3399 flow [2024-06-20 15:43:58,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=267, PETRI_TRANSITIONS=333} [2024-06-20 15:43:58,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-20 15:43:58,881 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 333 transitions, 3399 flow [2024-06-20 15:43:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:43:58,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:58,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:58,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:43:58,881 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:58,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1070406300, now seen corresponding path program 6 times [2024-06-20 15:43:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:58,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809791355] [2024-06-20 15:43:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:00,009 INFO 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 15:44:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809791355] [2024-06-20 15:44:00,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809791355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:00,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:00,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040665838] [2024-06-20 15:44:00,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:00,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:00,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:00,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:00,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:00,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 333 transitions, 3399 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:00,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:00,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:00,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:01,636 INFO L124 PetriNetUnfolderBase]: 3706/5942 cut-off events. [2024-06-20 15:44:01,636 INFO L125 PetriNetUnfolderBase]: For 955149/955154 co-relation queries the response was YES. [2024-06-20 15:44:01,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55181 conditions, 5942 events. 3706/5942 cut-off events. For 955149/955154 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 36237 event pairs, 784 based on Foata normal form. 8/5944 useless extension candidates. Maximal degree in co-relation 55055. Up to 5267 conditions per place. [2024-06-20 15:44:01,708 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 275 selfloop transitions, 95 changer transitions 0/375 dead transitions. [2024-06-20 15:44:01,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 375 transitions, 4379 flow [2024-06-20 15:44:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:44:01,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 15:44:01,709 INFO L175 Difference]: Start difference. First operand has 267 places, 333 transitions, 3399 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:44:01,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 375 transitions, 4379 flow [2024-06-20 15:44:02,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 375 transitions, 4229 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:02,695 INFO L231 Difference]: Finished difference. Result has 273 places, 339 transitions, 3578 flow [2024-06-20 15:44:02,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3578, PETRI_PLACES=273, PETRI_TRANSITIONS=339} [2024-06-20 15:44:02,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-20 15:44:02,696 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 339 transitions, 3578 flow [2024-06-20 15:44:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:02,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:02,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:02,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:44:02,696 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:02,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash 868759156, now seen corresponding path program 7 times [2024-06-20 15:44:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:02,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781308891] [2024-06-20 15:44:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:03,919 INFO 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 15:44:03,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:03,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781308891] [2024-06-20 15:44:03,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781308891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:03,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:03,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:03,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017800758] [2024-06-20 15:44:03,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:03,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:03,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:04,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:04,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 339 transitions, 3578 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:04,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:04,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:04,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:05,537 INFO L124 PetriNetUnfolderBase]: 3734/5980 cut-off events. [2024-06-20 15:44:05,537 INFO L125 PetriNetUnfolderBase]: For 979670/979675 co-relation queries the response was YES. [2024-06-20 15:44:05,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56477 conditions, 5980 events. 3734/5980 cut-off events. For 979670/979675 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36453 event pairs, 779 based on Foata normal form. 8/5982 useless extension candidates. Maximal degree in co-relation 56349. Up to 5306 conditions per place. [2024-06-20 15:44:05,610 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 118 changer transitions 0/384 dead transitions. [2024-06-20 15:44:05,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 384 transitions, 4632 flow [2024-06-20 15:44:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 15:44:05,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:44:05,612 INFO L175 Difference]: Start difference. First operand has 273 places, 339 transitions, 3578 flow. Second operand 10 states and 190 transitions. [2024-06-20 15:44:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 384 transitions, 4632 flow [2024-06-20 15:44:06,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 384 transitions, 4339 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:06,594 INFO L231 Difference]: Finished difference. Result has 277 places, 351 transitions, 3767 flow [2024-06-20 15:44:06,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3767, PETRI_PLACES=277, PETRI_TRANSITIONS=351} [2024-06-20 15:44:06,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-20 15:44:06,595 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 351 transitions, 3767 flow [2024-06-20 15:44:06,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:06,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:06,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:44:06,595 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:06,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash -18795972, now seen corresponding path program 8 times [2024-06-20 15:44:06,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:06,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729219564] [2024-06-20 15:44:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:07,736 INFO 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 15:44:07,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:07,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729219564] [2024-06-20 15:44:07,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729219564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:07,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:07,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:07,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641397341] [2024-06-20 15:44:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:07,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:07,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 351 transitions, 3767 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:07,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:07,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:07,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:09,327 INFO L124 PetriNetUnfolderBase]: 3751/6002 cut-off events. [2024-06-20 15:44:09,327 INFO L125 PetriNetUnfolderBase]: For 1002607/1002612 co-relation queries the response was YES. [2024-06-20 15:44:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57435 conditions, 6002 events. 3751/6002 cut-off events. For 1002607/1002612 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36489 event pairs, 774 based on Foata normal form. 8/6004 useless extension candidates. Maximal degree in co-relation 57305. Up to 5292 conditions per place. [2024-06-20 15:44:09,406 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 121 changer transitions 0/387 dead transitions. [2024-06-20 15:44:09,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 387 transitions, 4733 flow [2024-06-20 15:44:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 15:44:09,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-20 15:44:09,407 INFO L175 Difference]: Start difference. First operand has 277 places, 351 transitions, 3767 flow. Second operand 10 states and 192 transitions. [2024-06-20 15:44:09,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 387 transitions, 4733 flow [2024-06-20 15:44:10,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 387 transitions, 4491 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:10,765 INFO L231 Difference]: Finished difference. Result has 282 places, 353 transitions, 3876 flow [2024-06-20 15:44:10,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3876, PETRI_PLACES=282, PETRI_TRANSITIONS=353} [2024-06-20 15:44:10,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-20 15:44:10,765 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 353 transitions, 3876 flow [2024-06-20 15:44:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:10,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:10,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:44:10,766 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:10,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1889488122, now seen corresponding path program 9 times [2024-06-20 15:44:10,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:10,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940067067] [2024-06-20 15:44:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940067067] [2024-06-20 15:44:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940067067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:11,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:11,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058978647] [2024-06-20 15:44:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:12,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:12,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 353 transitions, 3876 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:12,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:12,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:12,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:13,561 INFO L124 PetriNetUnfolderBase]: 3779/6070 cut-off events. [2024-06-20 15:44:13,561 INFO L125 PetriNetUnfolderBase]: For 1023507/1023512 co-relation queries the response was YES. [2024-06-20 15:44:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57563 conditions, 6070 events. 3779/6070 cut-off events. For 1023507/1023512 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37275 event pairs, 804 based on Foata normal form. 8/6072 useless extension candidates. Maximal degree in co-relation 57432. Up to 5372 conditions per place. [2024-06-20 15:44:13,637 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 272 selfloop transitions, 115 changer transitions 0/392 dead transitions. [2024-06-20 15:44:13,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 392 transitions, 4900 flow [2024-06-20 15:44:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 15:44:13,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-20 15:44:13,638 INFO L175 Difference]: Start difference. First operand has 282 places, 353 transitions, 3876 flow. Second operand 10 states and 192 transitions. [2024-06-20 15:44:13,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 392 transitions, 4900 flow [2024-06-20 15:44:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 392 transitions, 4559 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:15,069 INFO L231 Difference]: Finished difference. Result has 285 places, 359 transitions, 3938 flow [2024-06-20 15:44:15,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3938, PETRI_PLACES=285, PETRI_TRANSITIONS=359} [2024-06-20 15:44:15,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-20 15:44:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 359 transitions, 3938 flow [2024-06-20 15:44:15,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:15,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:15,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:44:15,070 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:15,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -587418850, now seen corresponding path program 10 times [2024-06-20 15:44:15,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:15,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258605209] [2024-06-20 15:44:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:15,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:16,304 INFO 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 15:44:16,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:16,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258605209] [2024-06-20 15:44:16,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258605209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:16,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:16,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:16,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420262763] [2024-06-20 15:44:16,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:16,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:16,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:16,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:16,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:16,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 359 transitions, 3938 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:16,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:16,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:16,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:17,988 INFO L124 PetriNetUnfolderBase]: 3796/6117 cut-off events. [2024-06-20 15:44:17,988 INFO L125 PetriNetUnfolderBase]: For 1046325/1046330 co-relation queries the response was YES. [2024-06-20 15:44:18,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58057 conditions, 6117 events. 3796/6117 cut-off events. For 1046325/1046330 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37849 event pairs, 739 based on Foata normal form. 8/6119 useless extension candidates. Maximal degree in co-relation 57924. Up to 5055 conditions per place. [2024-06-20 15:44:18,055 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 148 changer transitions 0/400 dead transitions. [2024-06-20 15:44:18,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 400 transitions, 5380 flow [2024-06-20 15:44:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:44:18,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 15:44:18,056 INFO L175 Difference]: Start difference. First operand has 285 places, 359 transitions, 3938 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:44:18,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 400 transitions, 5380 flow [2024-06-20 15:44:19,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 400 transitions, 5075 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:19,410 INFO L231 Difference]: Finished difference. Result has 290 places, 363 transitions, 4152 flow [2024-06-20 15:44:19,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4152, PETRI_PLACES=290, PETRI_TRANSITIONS=363} [2024-06-20 15:44:19,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-20 15:44:19,411 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 363 transitions, 4152 flow [2024-06-20 15:44:19,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:19,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:19,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:44:19,412 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:19,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1167739958, now seen corresponding path program 11 times [2024-06-20 15:44:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:19,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277817207] [2024-06-20 15:44:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:20,533 INFO 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 15:44:20,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:20,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277817207] [2024-06-20 15:44:20,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277817207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:20,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:20,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:20,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76650599] [2024-06-20 15:44:20,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:20,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:20,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:20,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:20,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:20,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 363 transitions, 4152 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:20,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:20,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:20,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:22,249 INFO L124 PetriNetUnfolderBase]: 3813/6134 cut-off events. [2024-06-20 15:44:22,249 INFO L125 PetriNetUnfolderBase]: For 1069263/1069268 co-relation queries the response was YES. [2024-06-20 15:44:22,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58740 conditions, 6134 events. 3813/6134 cut-off events. For 1069263/1069268 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 37891 event pairs, 819 based on Foata normal form. 8/6136 useless extension candidates. Maximal degree in co-relation 58606. Up to 5426 conditions per place. [2024-06-20 15:44:22,324 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 277 selfloop transitions, 116 changer transitions 0/398 dead transitions. [2024-06-20 15:44:22,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 398 transitions, 5150 flow [2024-06-20 15:44:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 15:44:22,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-20 15:44:22,325 INFO L175 Difference]: Start difference. First operand has 290 places, 363 transitions, 4152 flow. Second operand 10 states and 191 transitions. [2024-06-20 15:44:22,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 398 transitions, 5150 flow [2024-06-20 15:44:23,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 398 transitions, 4850 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-20 15:44:23,387 INFO L231 Difference]: Finished difference. Result has 294 places, 365 transitions, 4205 flow [2024-06-20 15:44:23,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4205, PETRI_PLACES=294, PETRI_TRANSITIONS=365} [2024-06-20 15:44:23,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-20 15:44:23,388 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 365 transitions, 4205 flow [2024-06-20 15:44:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:23,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:23,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:23,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:44:23,388 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:23,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1160321348, now seen corresponding path program 12 times [2024-06-20 15:44:23,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:23,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443597872] [2024-06-20 15:44:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:24,550 INFO 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 15:44:24,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:24,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443597872] [2024-06-20 15:44:24,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443597872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804529189] [2024-06-20 15:44:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:24,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:24,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:24,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 365 transitions, 4205 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:24,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:24,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:24,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:26,228 INFO L124 PetriNetUnfolderBase]: 3830/6151 cut-off events. [2024-06-20 15:44:26,229 INFO L125 PetriNetUnfolderBase]: For 1085043/1085048 co-relation queries the response was YES. [2024-06-20 15:44:26,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59033 conditions, 6151 events. 3830/6151 cut-off events. For 1085043/1085048 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37843 event pairs, 804 based on Foata normal form. 8/6153 useless extension candidates. Maximal degree in co-relation 58897. Up to 5394 conditions per place. [2024-06-20 15:44:26,312 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 276 selfloop transitions, 120 changer transitions 0/401 dead transitions. [2024-06-20 15:44:26,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 401 transitions, 5193 flow [2024-06-20 15:44:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 15:44:26,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-20 15:44:26,313 INFO L175 Difference]: Start difference. First operand has 294 places, 365 transitions, 4205 flow. Second operand 10 states and 193 transitions. [2024-06-20 15:44:26,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 401 transitions, 5193 flow [2024-06-20 15:44:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 401 transitions, 4876 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:27,870 INFO L231 Difference]: Finished difference. Result has 296 places, 367 transitions, 4231 flow [2024-06-20 15:44:27,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4231, PETRI_PLACES=296, PETRI_TRANSITIONS=367} [2024-06-20 15:44:27,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-20 15:44:27,871 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 367 transitions, 4231 flow [2024-06-20 15:44:27,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:27,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:27,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:27,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:44:27,872 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:27,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1450522940, now seen corresponding path program 13 times [2024-06-20 15:44:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:27,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103813453] [2024-06-20 15:44:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:29,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:29,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103813453] [2024-06-20 15:44:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103813453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:29,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709530569] [2024-06-20 15:44:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:29,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:29,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:29,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:29,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:29,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 367 transitions, 4231 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:29,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:29,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:29,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:30,673 INFO L124 PetriNetUnfolderBase]: 3847/6188 cut-off events. [2024-06-20 15:44:30,673 INFO L125 PetriNetUnfolderBase]: For 1106976/1106981 co-relation queries the response was YES. [2024-06-20 15:44:30,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59427 conditions, 6188 events. 3847/6188 cut-off events. For 1106976/1106981 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38239 event pairs, 824 based on Foata normal form. 8/6190 useless extension candidates. Maximal degree in co-relation 59290. Up to 5480 conditions per place. [2024-06-20 15:44:30,756 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 290 selfloop transitions, 108 changer transitions 0/403 dead transitions. [2024-06-20 15:44:30,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 403 transitions, 5231 flow [2024-06-20 15:44:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 15:44:30,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-20 15:44:30,757 INFO L175 Difference]: Start difference. First operand has 296 places, 367 transitions, 4231 flow. Second operand 10 states and 193 transitions. [2024-06-20 15:44:30,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 403 transitions, 5231 flow [2024-06-20 15:44:32,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 403 transitions, 4910 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:32,654 INFO L231 Difference]: Finished difference. Result has 298 places, 369 transitions, 4233 flow [2024-06-20 15:44:32,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3910, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4233, PETRI_PLACES=298, PETRI_TRANSITIONS=369} [2024-06-20 15:44:32,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-20 15:44:32,655 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 369 transitions, 4233 flow [2024-06-20 15:44:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:32,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:32,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:44:32,655 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1450791710, now seen corresponding path program 14 times [2024-06-20 15:44:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990245812] [2024-06-20 15:44:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:33,822 INFO 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 15:44:33,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:33,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990245812] [2024-06-20 15:44:33,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990245812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:33,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:33,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:33,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335913422] [2024-06-20 15:44:33,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:33,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:33,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:33,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:33,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 369 transitions, 4233 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:33,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:33,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:35,447 INFO L124 PetriNetUnfolderBase]: 3864/6205 cut-off events. [2024-06-20 15:44:35,447 INFO L125 PetriNetUnfolderBase]: For 1128987/1128992 co-relation queries the response was YES. [2024-06-20 15:44:35,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59714 conditions, 6205 events. 3864/6205 cut-off events. For 1128987/1128992 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38232 event pairs, 809 based on Foata normal form. 8/6207 useless extension candidates. Maximal degree in co-relation 59576. Up to 5424 conditions per place. [2024-06-20 15:44:35,526 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 288 selfloop transitions, 115 changer transitions 0/408 dead transitions. [2024-06-20 15:44:35,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 408 transitions, 5599 flow [2024-06-20 15:44:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:44:35,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 15:44:35,527 INFO L175 Difference]: Start difference. First operand has 298 places, 369 transitions, 4233 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:44:35,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 408 transitions, 5599 flow [2024-06-20 15:44:37,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 408 transitions, 5246 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:37,023 INFO L231 Difference]: Finished difference. Result has 300 places, 371 transitions, 4217 flow [2024-06-20 15:44:37,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4217, PETRI_PLACES=300, PETRI_TRANSITIONS=371} [2024-06-20 15:44:37,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-20 15:44:37,024 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 371 transitions, 4217 flow [2024-06-20 15:44:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:37,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:37,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:37,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:44:37,024 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:37,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1249433690, now seen corresponding path program 15 times [2024-06-20 15:44:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528873108] [2024-06-20 15:44:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:38,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528873108] [2024-06-20 15:44:38,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528873108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:38,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:38,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010030452] [2024-06-20 15:44:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:38,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:38,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:38,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 371 transitions, 4217 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:38,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:38,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:38,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:39,822 INFO L124 PetriNetUnfolderBase]: 3856/6203 cut-off events. [2024-06-20 15:44:39,823 INFO L125 PetriNetUnfolderBase]: For 1131929/1131934 co-relation queries the response was YES. [2024-06-20 15:44:39,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59181 conditions, 6203 events. 3856/6203 cut-off events. For 1131929/1131934 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38354 event pairs, 820 based on Foata normal form. 8/6205 useless extension candidates. Maximal degree in co-relation 59044. Up to 5495 conditions per place. [2024-06-20 15:44:39,901 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 291 selfloop transitions, 110 changer transitions 0/406 dead transitions. [2024-06-20 15:44:39,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 406 transitions, 5133 flow [2024-06-20 15:44:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 15:44:39,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-20 15:44:39,903 INFO L175 Difference]: Start difference. First operand has 300 places, 371 transitions, 4217 flow. Second operand 10 states and 192 transitions. [2024-06-20 15:44:39,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 406 transitions, 5133 flow [2024-06-20 15:44:41,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 406 transitions, 4600 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-20 15:44:41,277 INFO L231 Difference]: Finished difference. Result has 301 places, 371 transitions, 3911 flow [2024-06-20 15:44:41,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3911, PETRI_PLACES=301, PETRI_TRANSITIONS=371} [2024-06-20 15:44:41,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-20 15:44:41,278 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 371 transitions, 3911 flow [2024-06-20 15:44:41,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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 15:44:41,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:41,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:41,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:44:41,278 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:41,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1162650582, now seen corresponding path program 5 times [2024-06-20 15:44:41,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:41,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419056395] [2024-06-20 15:44:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:41,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:42,177 INFO 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 15:44:42,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:42,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419056395] [2024-06-20 15:44:42,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419056395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:42,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:42,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:42,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677301463] [2024-06-20 15:44:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:42,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:42,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 371 transitions, 3911 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:42,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:42,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:42,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:43,558 INFO L124 PetriNetUnfolderBase]: 3861/6211 cut-off events. [2024-06-20 15:44:43,558 INFO L125 PetriNetUnfolderBase]: For 1136699/1136715 co-relation queries the response was YES. [2024-06-20 15:44:43,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 6211 events. 3861/6211 cut-off events. For 1136699/1136715 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38480 event pairs, 829 based on Foata normal form. 13/6217 useless extension candidates. Maximal degree in co-relation 58472. Up to 5831 conditions per place. [2024-06-20 15:44:43,631 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 333 selfloop transitions, 52 changer transitions 0/390 dead transitions. [2024-06-20 15:44:43,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 390 transitions, 5119 flow [2024-06-20 15:44:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 15:44:43,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-20 15:44:43,632 INFO L175 Difference]: Start difference. First operand has 301 places, 371 transitions, 3911 flow. Second operand 7 states and 127 transitions. [2024-06-20 15:44:43,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 390 transitions, 5119 flow [2024-06-20 15:44:44,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 390 transitions, 4850 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:44:44,918 INFO L231 Difference]: Finished difference. Result has 298 places, 377 transitions, 3950 flow [2024-06-20 15:44:44,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3950, PETRI_PLACES=298, PETRI_TRANSITIONS=377} [2024-06-20 15:44:44,918 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-20 15:44:44,918 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 377 transitions, 3950 flow [2024-06-20 15:44:44,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:44,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:44,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:44,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:44:44,919 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:44,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1214556650, now seen corresponding path program 6 times [2024-06-20 15:44:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:44,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566093596] [2024-06-20 15:44:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:45,802 INFO 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 15:44:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:45,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566093596] [2024-06-20 15:44:45,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566093596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:45,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:45,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38604122] [2024-06-20 15:44:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:45,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 377 transitions, 3950 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:45,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:45,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:45,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:47,075 INFO L124 PetriNetUnfolderBase]: 3858/6207 cut-off events. [2024-06-20 15:44:47,075 INFO L125 PetriNetUnfolderBase]: For 1154878/1154894 co-relation queries the response was YES. [2024-06-20 15:44:47,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58562 conditions, 6207 events. 3858/6207 cut-off events. For 1154878/1154894 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38450 event pairs, 829 based on Foata normal form. 13/6213 useless extension candidates. Maximal degree in co-relation 58425. Up to 5828 conditions per place. [2024-06-20 15:44:47,146 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 52 changer transitions 0/389 dead transitions. [2024-06-20 15:44:47,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 389 transitions, 4758 flow [2024-06-20 15:44:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 15:44:47,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 15:44:47,147 INFO L175 Difference]: Start difference. First operand has 298 places, 377 transitions, 3950 flow. Second operand 7 states and 126 transitions. [2024-06-20 15:44:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 389 transitions, 4758 flow [2024-06-20 15:44:48,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 4510 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-20 15:44:48,399 INFO L231 Difference]: Finished difference. Result has 301 places, 377 transitions, 3812 flow [2024-06-20 15:44:48,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3812, PETRI_PLACES=301, PETRI_TRANSITIONS=377} [2024-06-20 15:44:48,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-20 15:44:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 377 transitions, 3812 flow [2024-06-20 15:44:48,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 15:44:48,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:48,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:48,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:44:48,399 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:48,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash 718032822, now seen corresponding path program 2 times [2024-06-20 15:44:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:48,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649575096] [2024-06-20 15:44:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649575096] [2024-06-20 15:44:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649575096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:49,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:49,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:44:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579793835] [2024-06-20 15:44:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:44:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:44:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:44:49,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:44:49,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 377 transitions, 3812 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:44:49,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:49,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:44:49,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:51,001 INFO L124 PetriNetUnfolderBase]: 3500/5809 cut-off events. [2024-06-20 15:44:51,001 INFO L125 PetriNetUnfolderBase]: For 1182806/1182814 co-relation queries the response was YES. [2024-06-20 15:44:51,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55851 conditions, 5809 events. 3500/5809 cut-off events. For 1182806/1182814 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37577 event pairs, 794 based on Foata normal form. 4/5755 useless extension candidates. Maximal degree in co-relation 55713. Up to 5072 conditions per place. [2024-06-20 15:44:51,080 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 19 changer transitions 0/392 dead transitions. [2024-06-20 15:44:51,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 392 transitions, 4538 flow [2024-06-20 15:44:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:44:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:44:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:44:51,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-20 15:44:51,081 INFO L175 Difference]: Start difference. First operand has 301 places, 377 transitions, 3812 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:44:51,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 392 transitions, 4538 flow [2024-06-20 15:44:52,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 392 transitions, 4414 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:44:52,417 INFO L231 Difference]: Finished difference. Result has 303 places, 380 transitions, 3817 flow [2024-06-20 15:44:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3817, PETRI_PLACES=303, PETRI_TRANSITIONS=380} [2024-06-20 15:44:52,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-20 15:44:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 380 transitions, 3817 flow [2024-06-20 15:44:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:44:52,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:52,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:52,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:44:52,417 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:52,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash 732317622, now seen corresponding path program 3 times [2024-06-20 15:44:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540729961] [2024-06-20 15:44:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540729961] [2024-06-20 15:44:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540729961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:53,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:53,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:44:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117375379] [2024-06-20 15:44:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:44:53,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:44:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:44:53,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:44:53,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 380 transitions, 3817 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:44:53,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:53,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:44:53,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:54,913 INFO L124 PetriNetUnfolderBase]: 3517/5827 cut-off events. [2024-06-20 15:44:54,913 INFO L125 PetriNetUnfolderBase]: For 1198100/1198121 co-relation queries the response was YES. [2024-06-20 15:44:54,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56438 conditions, 5827 events. 3517/5827 cut-off events. For 1198100/1198121 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37607 event pairs, 784 based on Foata normal form. 13/5780 useless extension candidates. Maximal degree in co-relation 56299. Up to 5040 conditions per place. [2024-06-20 15:44:54,992 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 279 selfloop transitions, 40 changer transitions 0/405 dead transitions. [2024-06-20 15:44:54,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 405 transitions, 4955 flow [2024-06-20 15:44:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:44:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:44:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 15:44:54,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-20 15:44:54,993 INFO L175 Difference]: Start difference. First operand has 303 places, 380 transitions, 3817 flow. Second operand 8 states and 155 transitions. [2024-06-20 15:44:54,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 405 transitions, 4955 flow [2024-06-20 15:44:56,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 405 transitions, 4788 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-20 15:44:56,472 INFO L231 Difference]: Finished difference. Result has 307 places, 391 transitions, 4021 flow [2024-06-20 15:44:56,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4021, PETRI_PLACES=307, PETRI_TRANSITIONS=391} [2024-06-20 15:44:56,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-20 15:44:56,473 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 391 transitions, 4021 flow [2024-06-20 15:44:56,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:44:56,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:56,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:44:56,473 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:56,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash 732317157, now seen corresponding path program 4 times [2024-06-20 15:44:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:56,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258681043] [2024-06-20 15:44:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:57,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:57,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258681043] [2024-06-20 15:44:57,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258681043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:57,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:57,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:44:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100721564] [2024-06-20 15:44:57,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:57,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:44:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:44:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:44:57,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:44:57,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 391 transitions, 4021 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:44:57,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:57,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:44:57,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:59,100 INFO L124 PetriNetUnfolderBase]: 3526/5837 cut-off events. [2024-06-20 15:44:59,100 INFO L125 PetriNetUnfolderBase]: For 1227043/1227067 co-relation queries the response was YES. [2024-06-20 15:44:59,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56994 conditions, 5837 events. 3526/5837 cut-off events. For 1227043/1227067 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37616 event pairs, 791 based on Foata normal form. 14/5785 useless extension candidates. Maximal degree in co-relation 56852. Up to 4990 conditions per place. [2024-06-20 15:44:59,179 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 269 selfloop transitions, 55 changer transitions 0/410 dead transitions. [2024-06-20 15:44:59,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 410 transitions, 5075 flow [2024-06-20 15:44:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:44:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:44:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:44:59,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:44:59,181 INFO L175 Difference]: Start difference. First operand has 307 places, 391 transitions, 4021 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:44:59,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 410 transitions, 5075 flow [2024-06-20 15:45:00,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 410 transitions, 4968 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 15:45:00,991 INFO L231 Difference]: Finished difference. Result has 312 places, 397 transitions, 4192 flow [2024-06-20 15:45:00,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4192, PETRI_PLACES=312, PETRI_TRANSITIONS=397} [2024-06-20 15:45:00,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-20 15:45:00,992 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 397 transitions, 4192 flow [2024-06-20 15:45:00,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:00,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:00,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:00,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:45:00,992 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:00,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash 717572007, now seen corresponding path program 5 times [2024-06-20 15:45:00,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:00,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249541124] [2024-06-20 15:45:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:02,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249541124] [2024-06-20 15:45:02,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249541124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:02,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:02,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:02,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744736478] [2024-06-20 15:45:02,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:02,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:02,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:02,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:02,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:02,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 397 transitions, 4192 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:02,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:02,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:02,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:03,712 INFO L124 PetriNetUnfolderBase]: 3531/5847 cut-off events. [2024-06-20 15:45:03,712 INFO L125 PetriNetUnfolderBase]: For 1252722/1252746 co-relation queries the response was YES. [2024-06-20 15:45:03,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57799 conditions, 5847 events. 3531/5847 cut-off events. For 1252722/1252746 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37703 event pairs, 791 based on Foata normal form. 13/5795 useless extension candidates. Maximal degree in co-relation 57655. Up to 5030 conditions per place. [2024-06-20 15:45:03,785 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 291 selfloop transitions, 35 changer transitions 0/412 dead transitions. [2024-06-20 15:45:03,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 412 transitions, 4964 flow [2024-06-20 15:45:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 15:45:03,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-20 15:45:03,786 INFO L175 Difference]: Start difference. First operand has 312 places, 397 transitions, 4192 flow. Second operand 8 states and 153 transitions. [2024-06-20 15:45:03,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 412 transitions, 4964 flow [2024-06-20 15:45:05,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 412 transitions, 4840 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:05,814 INFO L231 Difference]: Finished difference. Result has 316 places, 400 transitions, 4234 flow [2024-06-20 15:45:05,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4234, PETRI_PLACES=316, PETRI_TRANSITIONS=400} [2024-06-20 15:45:05,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-20 15:45:05,814 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 400 transitions, 4234 flow [2024-06-20 15:45:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:45:05,814 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:05,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash 717585492, now seen corresponding path program 4 times [2024-06-20 15:45:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880970732] [2024-06-20 15:45:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:07,087 INFO 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 15:45:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880970732] [2024-06-20 15:45:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880970732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:07,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642872947] [2024-06-20 15:45:07,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:07,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:07,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:07,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:07,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 400 transitions, 4234 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:07,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:07,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:07,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:08,474 INFO L124 PetriNetUnfolderBase]: 3529/5848 cut-off events. [2024-06-20 15:45:08,475 INFO L125 PetriNetUnfolderBase]: For 1269010/1269037 co-relation queries the response was YES. [2024-06-20 15:45:08,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57954 conditions, 5848 events. 3529/5848 cut-off events. For 1269010/1269037 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37778 event pairs, 784 based on Foata normal form. 14/5802 useless extension candidates. Maximal degree in co-relation 57808. Up to 5076 conditions per place. [2024-06-20 15:45:08,557 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 26 changer transitions 0/417 dead transitions. [2024-06-20 15:45:08,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 417 transitions, 5037 flow [2024-06-20 15:45:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:45:08,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:45:08,558 INFO L175 Difference]: Start difference. First operand has 316 places, 400 transitions, 4234 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:45:08,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 417 transitions, 5037 flow [2024-06-20 15:45:10,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 417 transitions, 4857 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:10,889 INFO L231 Difference]: Finished difference. Result has 318 places, 403 transitions, 4210 flow [2024-06-20 15:45:10,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4210, PETRI_PLACES=318, PETRI_TRANSITIONS=403} [2024-06-20 15:45:10,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-20 15:45:10,890 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 403 transitions, 4210 flow [2024-06-20 15:45:10,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:10,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:10,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:10,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:45:10,890 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:10,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash 717585027, now seen corresponding path program 6 times [2024-06-20 15:45:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877939387] [2024-06-20 15:45:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:12,135 INFO 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 15:45:12,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:12,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877939387] [2024-06-20 15:45:12,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877939387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:12,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:12,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:12,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208963384] [2024-06-20 15:45:12,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:12,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:12,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:12,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 403 transitions, 4210 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:12,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:12,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:12,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:13,457 INFO L124 PetriNetUnfolderBase]: 3544/5859 cut-off events. [2024-06-20 15:45:13,457 INFO L125 PetriNetUnfolderBase]: For 1272238/1272254 co-relation queries the response was YES. [2024-06-20 15:45:13,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58235 conditions, 5859 events. 3544/5859 cut-off events. For 1272238/1272254 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37647 event pairs, 790 based on Foata normal form. 18/5812 useless extension candidates. Maximal degree in co-relation 58088. Up to 5020 conditions per place. [2024-06-20 15:45:13,538 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 289 selfloop transitions, 40 changer transitions 0/415 dead transitions. [2024-06-20 15:45:13,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 415 transitions, 4904 flow [2024-06-20 15:45:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 15:45:13,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-20 15:45:13,539 INFO L175 Difference]: Start difference. First operand has 318 places, 403 transitions, 4210 flow. Second operand 8 states and 155 transitions. [2024-06-20 15:45:13,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 415 transitions, 4904 flow [2024-06-20 15:45:15,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 415 transitions, 4730 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:15,357 INFO L231 Difference]: Finished difference. Result has 320 places, 403 transitions, 4122 flow [2024-06-20 15:45:15,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4036, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4122, PETRI_PLACES=320, PETRI_TRANSITIONS=403} [2024-06-20 15:45:15,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-20 15:45:15,357 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 403 transitions, 4122 flow [2024-06-20 15:45:15,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:15,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:15,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:15,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:45:15,358 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:15,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1391799212, now seen corresponding path program 1 times [2024-06-20 15:45:15,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:15,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935913713] [2024-06-20 15:45:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:16,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:16,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935913713] [2024-06-20 15:45:16,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935913713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:16,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:16,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170275368] [2024-06-20 15:45:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:16,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:16,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 403 transitions, 4122 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:16,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:16,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:17,763 INFO L124 PetriNetUnfolderBase]: 3618/5949 cut-off events. [2024-06-20 15:45:17,763 INFO L125 PetriNetUnfolderBase]: For 1281092/1281113 co-relation queries the response was YES. [2024-06-20 15:45:17,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58693 conditions, 5949 events. 3618/5949 cut-off events. For 1281092/1281113 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37814 event pairs, 757 based on Foata normal form. 22/5935 useless extension candidates. Maximal degree in co-relation 58545. Up to 5305 conditions per place. [2024-06-20 15:45:17,847 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 356 selfloop transitions, 17 changer transitions 0/426 dead transitions. [2024-06-20 15:45:17,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 426 transitions, 5008 flow [2024-06-20 15:45:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:45:17,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:45:17,848 INFO L175 Difference]: Start difference. First operand has 320 places, 403 transitions, 4122 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:45:17,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 426 transitions, 5008 flow [2024-06-20 15:45:20,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 426 transitions, 4868 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:45:20,561 INFO L231 Difference]: Finished difference. Result has 321 places, 406 transitions, 4108 flow [2024-06-20 15:45:20,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4108, PETRI_PLACES=321, PETRI_TRANSITIONS=406} [2024-06-20 15:45:20,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-20 15:45:20,562 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 406 transitions, 4108 flow [2024-06-20 15:45:20,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:20,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:20,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:20,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:45:20,562 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:20,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1391679056, now seen corresponding path program 1 times [2024-06-20 15:45:20,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:20,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499498175] [2024-06-20 15:45:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:20,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499498175] [2024-06-20 15:45:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499498175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:21,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:21,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:21,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177475960] [2024-06-20 15:45:21,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:21,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:21,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:21,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:21,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 406 transitions, 4108 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:21,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:21,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:21,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:23,094 INFO L124 PetriNetUnfolderBase]: 3647/5980 cut-off events. [2024-06-20 15:45:23,094 INFO L125 PetriNetUnfolderBase]: For 1340796/1340823 co-relation queries the response was YES. [2024-06-20 15:45:23,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59602 conditions, 5980 events. 3647/5980 cut-off events. For 1340796/1340823 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37948 event pairs, 746 based on Foata normal form. 27/5970 useless extension candidates. Maximal degree in co-relation 59453. Up to 5338 conditions per place. [2024-06-20 15:45:23,172 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 18 changer transitions 0/429 dead transitions. [2024-06-20 15:45:23,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 429 transitions, 4998 flow [2024-06-20 15:45:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:45:23,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:45:23,173 INFO L175 Difference]: Start difference. First operand has 321 places, 406 transitions, 4108 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:45:23,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 429 transitions, 4998 flow [2024-06-20 15:45:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 429 transitions, 4894 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:25,104 INFO L231 Difference]: Finished difference. Result has 323 places, 410 transitions, 4129 flow [2024-06-20 15:45:25,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4129, PETRI_PLACES=323, PETRI_TRANSITIONS=410} [2024-06-20 15:45:25,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-20 15:45:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 410 transitions, 4129 flow [2024-06-20 15:45:25,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:25,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:25,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:25,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:45:25,105 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:25,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1387030916, now seen corresponding path program 2 times [2024-06-20 15:45:25,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:25,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376855340] [2024-06-20 15:45:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:25,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:26,332 INFO 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 15:45:26,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:26,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376855340] [2024-06-20 15:45:26,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376855340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:26,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:26,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189837765] [2024-06-20 15:45:26,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:26,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:26,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:26,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 410 transitions, 4129 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:26,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:26,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:26,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:27,964 INFO L124 PetriNetUnfolderBase]: 3694/6049 cut-off events. [2024-06-20 15:45:27,965 INFO L125 PetriNetUnfolderBase]: For 1379343/1379370 co-relation queries the response was YES. [2024-06-20 15:45:28,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61722 conditions, 6049 events. 3694/6049 cut-off events. For 1379343/1379370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38369 event pairs, 749 based on Foata normal form. 23/6036 useless extension candidates. Maximal degree in co-relation 61572. Up to 5358 conditions per place. [2024-06-20 15:45:28,053 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 34 changer transitions 0/436 dead transitions. [2024-06-20 15:45:28,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 436 transitions, 5334 flow [2024-06-20 15:45:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 15:45:28,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:45:28,054 INFO L175 Difference]: Start difference. First operand has 323 places, 410 transitions, 4129 flow. Second operand 8 states and 160 transitions. [2024-06-20 15:45:28,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 436 transitions, 5334 flow [2024-06-20 15:45:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 436 transitions, 5241 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:30,451 INFO L231 Difference]: Finished difference. Result has 326 places, 417 transitions, 4279 flow [2024-06-20 15:45:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4036, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4279, PETRI_PLACES=326, PETRI_TRANSITIONS=417} [2024-06-20 15:45:30,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-20 15:45:30,451 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 417 transitions, 4279 flow [2024-06-20 15:45:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:30,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:30,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:45:30,451 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1488531882, now seen corresponding path program 3 times [2024-06-20 15:45:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506658147] [2024-06-20 15:45:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:30,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:31,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506658147] [2024-06-20 15:45:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506658147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:31,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:31,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45925845] [2024-06-20 15:45:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:31,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:31,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 417 transitions, 4279 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:31,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:31,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:31,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:33,078 INFO L124 PetriNetUnfolderBase]: 3682/6033 cut-off events. [2024-06-20 15:45:33,079 INFO L125 PetriNetUnfolderBase]: For 1389186/1389207 co-relation queries the response was YES. [2024-06-20 15:45:33,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62311 conditions, 6033 events. 3682/6033 cut-off events. For 1389186/1389207 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38297 event pairs, 745 based on Foata normal form. 25/6022 useless extension candidates. Maximal degree in co-relation 62159. Up to 5384 conditions per place. [2024-06-20 15:45:33,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 361 selfloop transitions, 23 changer transitions 0/437 dead transitions. [2024-06-20 15:45:33,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 437 transitions, 5194 flow [2024-06-20 15:45:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:45:33,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:45:33,166 INFO L175 Difference]: Start difference. First operand has 326 places, 417 transitions, 4279 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:45:33,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 437 transitions, 5194 flow [2024-06-20 15:45:35,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 437 transitions, 5102 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:35,306 INFO L231 Difference]: Finished difference. Result has 330 places, 421 transitions, 4331 flow [2024-06-20 15:45:35,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4331, PETRI_PLACES=330, PETRI_TRANSITIONS=421} [2024-06-20 15:45:35,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-20 15:45:35,307 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 421 transitions, 4331 flow [2024-06-20 15:45:35,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:35,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:35,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:35,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:45:35,307 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:35,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash 732532638, now seen corresponding path program 4 times [2024-06-20 15:45:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:35,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838460838] [2024-06-20 15:45:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:36,492 INFO 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 15:45:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838460838] [2024-06-20 15:45:36,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838460838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:36,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:36,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587396626] [2024-06-20 15:45:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:36,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:36,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:36,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 421 transitions, 4331 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:36,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:36,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:36,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:37,915 INFO L124 PetriNetUnfolderBase]: 3713/6082 cut-off events. [2024-06-20 15:45:37,915 INFO L125 PetriNetUnfolderBase]: For 1422611/1422635 co-relation queries the response was YES. [2024-06-20 15:45:37,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63450 conditions, 6082 events. 3713/6082 cut-off events. For 1422611/1422635 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38652 event pairs, 756 based on Foata normal form. 26/6070 useless extension candidates. Maximal degree in co-relation 63296. Up to 5320 conditions per place. [2024-06-20 15:45:38,004 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 331 selfloop transitions, 63 changer transitions 0/447 dead transitions. [2024-06-20 15:45:38,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 447 transitions, 5893 flow [2024-06-20 15:45:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 15:45:38,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-20 15:45:38,005 INFO L175 Difference]: Start difference. First operand has 330 places, 421 transitions, 4331 flow. Second operand 8 states and 162 transitions. [2024-06-20 15:45:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 447 transitions, 5893 flow [2024-06-20 15:45:40,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 447 transitions, 5796 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:40,220 INFO L231 Difference]: Finished difference. Result has 334 places, 431 transitions, 4676 flow [2024-06-20 15:45:40,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4234, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=334, PETRI_TRANSITIONS=431} [2024-06-20 15:45:40,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-20 15:45:40,221 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 431 transitions, 4676 flow [2024-06-20 15:45:40,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:40,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:40,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:45:40,222 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 724251918, now seen corresponding path program 5 times [2024-06-20 15:45:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:40,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100832506] [2024-06-20 15:45:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100832506] [2024-06-20 15:45:41,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100832506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:41,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:41,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021436502] [2024-06-20 15:45:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:41,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:41,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 431 transitions, 4676 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:41,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:41,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:41,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:42,959 INFO L124 PetriNetUnfolderBase]: 3704/6082 cut-off events. [2024-06-20 15:45:42,959 INFO L125 PetriNetUnfolderBase]: For 1455408/1455438 co-relation queries the response was YES. [2024-06-20 15:45:43,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64508 conditions, 6082 events. 3704/6082 cut-off events. For 1455408/1455438 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38788 event pairs, 764 based on Foata normal form. 29/6072 useless extension candidates. Maximal degree in co-relation 64351. Up to 5399 conditions per place. [2024-06-20 15:45:43,050 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 30 changer transitions 0/448 dead transitions. [2024-06-20 15:45:43,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 448 transitions, 5615 flow [2024-06-20 15:45:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:45:43,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:45:43,051 INFO L175 Difference]: Start difference. First operand has 334 places, 431 transitions, 4676 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:45:43,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 448 transitions, 5615 flow [2024-06-20 15:45:45,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 448 transitions, 5497 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-20 15:45:45,523 INFO L231 Difference]: Finished difference. Result has 339 places, 434 transitions, 4708 flow [2024-06-20 15:45:45,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4708, PETRI_PLACES=339, PETRI_TRANSITIONS=434} [2024-06-20 15:45:45,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-20 15:45:45,524 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 434 transitions, 4708 flow [2024-06-20 15:45:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:45,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:45,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:45,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:45:45,524 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:45,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:45,525 INFO L85 PathProgramCache]: Analyzing trace with hash 724258428, now seen corresponding path program 6 times [2024-06-20 15:45:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:45,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071122222] [2024-06-20 15:45:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:46,796 INFO 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 15:45:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:46,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071122222] [2024-06-20 15:45:46,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071122222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:46,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:46,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851904435] [2024-06-20 15:45:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:46,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:45:46,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 434 transitions, 4708 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:46,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:46,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:45:46,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:48,224 INFO L124 PetriNetUnfolderBase]: 3697/6072 cut-off events. [2024-06-20 15:45:48,224 INFO L125 PetriNetUnfolderBase]: For 1437529/1437559 co-relation queries the response was YES. [2024-06-20 15:45:48,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64055 conditions, 6072 events. 3697/6072 cut-off events. For 1437529/1437559 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38741 event pairs, 762 based on Foata normal form. 25/6059 useless extension candidates. Maximal degree in co-relation 63896. Up to 5376 conditions per place. [2024-06-20 15:45:48,310 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 360 selfloop transitions, 37 changer transitions 0/450 dead transitions. [2024-06-20 15:45:48,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 450 transitions, 5591 flow [2024-06-20 15:45:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 15:45:48,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:45:48,311 INFO L175 Difference]: Start difference. First operand has 339 places, 434 transitions, 4708 flow. Second operand 8 states and 160 transitions. [2024-06-20 15:45:48,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 450 transitions, 5591 flow [2024-06-20 15:45:50,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 450 transitions, 5458 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:50,818 INFO L231 Difference]: Finished difference. Result has 341 places, 434 transitions, 4660 flow [2024-06-20 15:45:50,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4660, PETRI_PLACES=341, PETRI_TRANSITIONS=434} [2024-06-20 15:45:50,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-20 15:45:50,818 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 434 transitions, 4660 flow [2024-06-20 15:45:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 15:45:50,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:50,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:45:50,819 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:50,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash 732840468, now seen corresponding path program 1 times [2024-06-20 15:45:50,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:50,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161129889] [2024-06-20 15:45:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:50,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:52,678 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 15:45:52,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:52,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161129889] [2024-06-20 15:45:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161129889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:45:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267095674] [2024-06-20 15:45:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:45:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:52,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:45:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:45:52,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:45:52,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 434 transitions, 4660 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:52,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:52,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:45:52,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:54,150 INFO L124 PetriNetUnfolderBase]: 3452/5779 cut-off events. [2024-06-20 15:45:54,150 INFO L125 PetriNetUnfolderBase]: For 1446393/1446421 co-relation queries the response was YES. [2024-06-20 15:45:54,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61665 conditions, 5779 events. 3452/5779 cut-off events. For 1446393/1446421 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37852 event pairs, 753 based on Foata normal form. 16/5717 useless extension candidates. Maximal degree in co-relation 61505. Up to 4866 conditions per place. [2024-06-20 15:45:54,239 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 306 selfloop transitions, 19 changer transitions 0/449 dead transitions. [2024-06-20 15:45:54,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 449 transitions, 5428 flow [2024-06-20 15:45:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:45:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:45:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:45:54,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-20 15:45:54,240 INFO L175 Difference]: Start difference. First operand has 341 places, 434 transitions, 4660 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:45:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 449 transitions, 5428 flow [2024-06-20 15:45:56,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 449 transitions, 5212 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 15:45:56,461 INFO L231 Difference]: Finished difference. Result has 341 places, 436 transitions, 4575 flow [2024-06-20 15:45:56,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4444, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4575, PETRI_PLACES=341, PETRI_TRANSITIONS=436} [2024-06-20 15:45:56,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-20 15:45:56,462 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 436 transitions, 4575 flow [2024-06-20 15:45:56,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:56,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:56,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:56,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:45:56,462 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:56,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1017580244, now seen corresponding path program 1 times [2024-06-20 15:45:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:56,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942916676] [2024-06-20 15:45:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:57,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:57,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942916676] [2024-06-20 15:45:57,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942916676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:57,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:57,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:57,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352096202] [2024-06-20 15:45:57,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:57,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:57,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:57,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:57,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:57,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 436 transitions, 4575 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:57,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:57,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:57,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:58,863 INFO L124 PetriNetUnfolderBase]: 4005/6402 cut-off events. [2024-06-20 15:45:58,864 INFO L125 PetriNetUnfolderBase]: For 1445755/1445762 co-relation queries the response was YES. [2024-06-20 15:45:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65591 conditions, 6402 events. 4005/6402 cut-off events. For 1445755/1445762 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39337 event pairs, 804 based on Foata normal form. 7/6407 useless extension candidates. Maximal degree in co-relation 65432. Up to 5973 conditions per place. [2024-06-20 15:45:58,959 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 61 changer transitions 0/466 dead transitions. [2024-06-20 15:45:58,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 466 transitions, 5679 flow [2024-06-20 15:45:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 15:45:58,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-20 15:45:58,960 INFO L175 Difference]: Start difference. First operand has 341 places, 436 transitions, 4575 flow. Second operand 8 states and 153 transitions. [2024-06-20 15:45:58,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 466 transitions, 5679 flow [2024-06-20 15:46:01,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 466 transitions, 5564 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:01,490 INFO L231 Difference]: Finished difference. Result has 342 places, 439 transitions, 4688 flow [2024-06-20 15:46:01,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4688, PETRI_PLACES=342, PETRI_TRANSITIONS=439} [2024-06-20 15:46:01,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-20 15:46:01,491 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 439 transitions, 4688 flow [2024-06-20 15:46:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:01,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:01,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:46:01,491 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1792108210, now seen corresponding path program 2 times [2024-06-20 15:46:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:01,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708667852] [2024-06-20 15:46:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:02,397 INFO 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 15:46:02,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708667852] [2024-06-20 15:46:02,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708667852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:02,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:02,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082828078] [2024-06-20 15:46:02,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:02,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:02,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:02,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:02,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:02,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 439 transitions, 4688 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:02,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:02,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:02,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:04,116 INFO L124 PetriNetUnfolderBase]: 4018/6421 cut-off events. [2024-06-20 15:46:04,116 INFO L125 PetriNetUnfolderBase]: For 1475641/1475648 co-relation queries the response was YES. [2024-06-20 15:46:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66505 conditions, 6421 events. 4018/6421 cut-off events. For 1475641/1475648 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39465 event pairs, 806 based on Foata normal form. 7/6426 useless extension candidates. Maximal degree in co-relation 66345. Up to 5967 conditions per place. [2024-06-20 15:46:04,197 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 399 selfloop transitions, 67 changer transitions 0/471 dead transitions. [2024-06-20 15:46:04,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 471 transitions, 6141 flow [2024-06-20 15:46:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:46:04,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:46:04,198 INFO L175 Difference]: Start difference. First operand has 342 places, 439 transitions, 4688 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:46:04,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 471 transitions, 6141 flow [2024-06-20 15:46:06,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 471 transitions, 5939 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:06,743 INFO L231 Difference]: Finished difference. Result has 345 places, 447 transitions, 4863 flow [2024-06-20 15:46:06,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4863, PETRI_PLACES=345, PETRI_TRANSITIONS=447} [2024-06-20 15:46:06,743 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-20 15:46:06,744 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 447 transitions, 4863 flow [2024-06-20 15:46:06,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:06,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:06,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:06,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:46:06,744 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:06,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash 886202477, now seen corresponding path program 1 times [2024-06-20 15:46:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:06,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104076332] [2024-06-20 15:46:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:08,000 INFO 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 15:46:08,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:08,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104076332] [2024-06-20 15:46:08,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104076332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:08,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:08,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:46:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422611541] [2024-06-20 15:46:08,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:46:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:46:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:46:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:08,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 447 transitions, 4863 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:08,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:08,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:10,132 INFO L124 PetriNetUnfolderBase]: 4182/6726 cut-off events. [2024-06-20 15:46:10,132 INFO L125 PetriNetUnfolderBase]: For 1568426/1568433 co-relation queries the response was YES. [2024-06-20 15:46:10,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68901 conditions, 6726 events. 4182/6726 cut-off events. For 1568426/1568433 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42210 event pairs, 773 based on Foata normal form. 16/6738 useless extension candidates. Maximal degree in co-relation 68739. Up to 5345 conditions per place. [2024-06-20 15:46:10,225 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 363 selfloop transitions, 141 changer transitions 0/509 dead transitions. [2024-06-20 15:46:10,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 509 transitions, 6311 flow [2024-06-20 15:46:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:46:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:46:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-20 15:46:10,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-20 15:46:10,226 INFO L175 Difference]: Start difference. First operand has 345 places, 447 transitions, 4863 flow. Second operand 11 states and 222 transitions. [2024-06-20 15:46:10,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 509 transitions, 6311 flow [2024-06-20 15:46:12,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 509 transitions, 6132 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 15:46:12,821 INFO L231 Difference]: Finished difference. Result has 354 places, 458 transitions, 5210 flow [2024-06-20 15:46:12,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4684, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5210, PETRI_PLACES=354, PETRI_TRANSITIONS=458} [2024-06-20 15:46:12,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-20 15:46:12,821 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 458 transitions, 5210 flow [2024-06-20 15:46:12,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:12,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:12,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:12,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:46:12,821 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:12,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1010905076, now seen corresponding path program 1 times [2024-06-20 15:46:12,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:12,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905656287] [2024-06-20 15:46:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:12,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:13,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:13,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905656287] [2024-06-20 15:46:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905656287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:13,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:13,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600571274] [2024-06-20 15:46:13,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:14,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:46:14,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 458 transitions, 5210 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:14,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:14,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:46:14,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:15,631 INFO L124 PetriNetUnfolderBase]: 3836/6355 cut-off events. [2024-06-20 15:46:15,631 INFO L125 PetriNetUnfolderBase]: For 1577443/1577493 co-relation queries the response was YES. [2024-06-20 15:46:15,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67631 conditions, 6355 events. 3836/6355 cut-off events. For 1577443/1577493 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 41611 event pairs, 784 based on Foata normal form. 11/6291 useless extension candidates. Maximal degree in co-relation 67465. Up to 5463 conditions per place. [2024-06-20 15:46:15,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 366 selfloop transitions, 29 changer transitions 0/488 dead transitions. [2024-06-20 15:46:15,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 488 transitions, 6188 flow [2024-06-20 15:46:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:46:15,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 15:46:15,733 INFO L175 Difference]: Start difference. First operand has 354 places, 458 transitions, 5210 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:46:15,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 488 transitions, 6188 flow [2024-06-20 15:46:18,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 488 transitions, 5865 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:18,656 INFO L231 Difference]: Finished difference. Result has 357 places, 461 transitions, 5049 flow [2024-06-20 15:46:18,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5049, PETRI_PLACES=357, PETRI_TRANSITIONS=461} [2024-06-20 15:46:18,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-20 15:46:18,657 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 461 transitions, 5049 flow [2024-06-20 15:46:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:18,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:18,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:46:18,657 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:18,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash -873689714, now seen corresponding path program 3 times [2024-06-20 15:46:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:18,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784525978] [2024-06-20 15:46:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:19,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:19,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784525978] [2024-06-20 15:46:19,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784525978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:19,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:19,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:19,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624006677] [2024-06-20 15:46:19,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:19,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:19,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:19,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 461 transitions, 5049 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:19,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:19,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:19,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:21,276 INFO L124 PetriNetUnfolderBase]: 4207/6781 cut-off events. [2024-06-20 15:46:21,276 INFO L125 PetriNetUnfolderBase]: For 1560535/1560538 co-relation queries the response was YES. [2024-06-20 15:46:21,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70220 conditions, 6781 events. 4207/6781 cut-off events. For 1560535/1560538 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42688 event pairs, 830 based on Foata normal form. 3/6782 useless extension candidates. Maximal degree in co-relation 70053. Up to 6310 conditions per place. [2024-06-20 15:46:21,380 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 425 selfloop transitions, 58 changer transitions 0/488 dead transitions. [2024-06-20 15:46:21,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 488 transitions, 6178 flow [2024-06-20 15:46:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:46:21,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-20 15:46:21,381 INFO L175 Difference]: Start difference. First operand has 357 places, 461 transitions, 5049 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:46:21,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 488 transitions, 6178 flow [2024-06-20 15:46:23,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 488 transitions, 6042 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 15:46:23,851 INFO L231 Difference]: Finished difference. Result has 358 places, 464 transitions, 5128 flow [2024-06-20 15:46:23,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4913, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5128, PETRI_PLACES=358, PETRI_TRANSITIONS=464} [2024-06-20 15:46:23,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-20 15:46:23,851 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 464 transitions, 5128 flow [2024-06-20 15:46:23,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:23,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:46:23,852 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:23,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1487685247, now seen corresponding path program 1 times [2024-06-20 15:46:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:23,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044908528] [2024-06-20 15:46:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:23,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:24,681 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 15:46:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044908528] [2024-06-20 15:46:24,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044908528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:24,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:24,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428382555] [2024-06-20 15:46:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:24,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:24,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:24,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 464 transitions, 5128 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:24,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:24,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:24,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:26,410 INFO L124 PetriNetUnfolderBase]: 4217/6798 cut-off events. [2024-06-20 15:46:26,411 INFO L125 PetriNetUnfolderBase]: For 1593223/1593230 co-relation queries the response was YES. [2024-06-20 15:46:26,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70500 conditions, 6798 events. 4217/6798 cut-off events. For 1593223/1593230 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42900 event pairs, 831 based on Foata normal form. 8/6803 useless extension candidates. Maximal degree in co-relation 70332. Up to 6375 conditions per place. [2024-06-20 15:46:26,516 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 36 changer transitions 0/493 dead transitions. [2024-06-20 15:46:26,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 493 transitions, 6300 flow [2024-06-20 15:46:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:46:26,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:46:26,517 INFO L175 Difference]: Start difference. First operand has 358 places, 464 transitions, 5128 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:46:26,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 493 transitions, 6300 flow [2024-06-20 15:46:29,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 493 transitions, 6120 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:29,527 INFO L231 Difference]: Finished difference. Result has 360 places, 467 transitions, 5128 flow [2024-06-20 15:46:29,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5128, PETRI_PLACES=360, PETRI_TRANSITIONS=467} [2024-06-20 15:46:29,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-20 15:46:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 467 transitions, 5128 flow [2024-06-20 15:46:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:29,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:29,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:29,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:46:29,528 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:29,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2083404487, now seen corresponding path program 2 times [2024-06-20 15:46:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:29,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616294820] [2024-06-20 15:46:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:30,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:30,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616294820] [2024-06-20 15:46:30,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616294820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:30,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:30,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:30,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703531997] [2024-06-20 15:46:30,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:30,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:30,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:30,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 467 transitions, 5128 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:30,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:30,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:30,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:32,100 INFO L124 PetriNetUnfolderBase]: 4227/6814 cut-off events. [2024-06-20 15:46:32,100 INFO L125 PetriNetUnfolderBase]: For 1620385/1620392 co-relation queries the response was YES. [2024-06-20 15:46:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71251 conditions, 6814 events. 4227/6814 cut-off events. For 1620385/1620392 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 42990 event pairs, 831 based on Foata normal form. 8/6819 useless extension candidates. Maximal degree in co-relation 71082. Up to 6378 conditions per place. [2024-06-20 15:46:32,205 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 449 selfloop transitions, 40 changer transitions 0/494 dead transitions. [2024-06-20 15:46:32,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 494 transitions, 6314 flow [2024-06-20 15:46:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:46:32,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:46:32,206 INFO L175 Difference]: Start difference. First operand has 360 places, 467 transitions, 5128 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:46:32,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 494 transitions, 6314 flow [2024-06-20 15:46:35,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 494 transitions, 6178 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 15:46:35,268 INFO L231 Difference]: Finished difference. Result has 363 places, 470 transitions, 5186 flow [2024-06-20 15:46:35,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5186, PETRI_PLACES=363, PETRI_TRANSITIONS=470} [2024-06-20 15:46:35,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-20 15:46:35,268 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 470 transitions, 5186 flow [2024-06-20 15:46:35,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:35,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:35,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:46:35,268 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:35,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1487535734, now seen corresponding path program 4 times [2024-06-20 15:46:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:35,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636209196] [2024-06-20 15:46:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:35,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:36,183 INFO 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 15:46:36,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:36,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636209196] [2024-06-20 15:46:36,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636209196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:36,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:36,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:36,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049570999] [2024-06-20 15:46:36,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:36,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:36,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:36,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:36,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:36,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 470 transitions, 5186 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:36,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:36,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:36,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:37,884 INFO L124 PetriNetUnfolderBase]: 4232/6840 cut-off events. [2024-06-20 15:46:37,884 INFO L125 PetriNetUnfolderBase]: For 1641806/1641809 co-relation queries the response was YES. [2024-06-20 15:46:37,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71937 conditions, 6840 events. 4232/6840 cut-off events. For 1641806/1641809 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 43347 event pairs, 849 based on Foata normal form. 3/6841 useless extension candidates. Maximal degree in co-relation 71767. Up to 6330 conditions per place. [2024-06-20 15:46:37,990 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 423 selfloop transitions, 65 changer transitions 0/493 dead transitions. [2024-06-20 15:46:37,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 493 transitions, 6332 flow [2024-06-20 15:46:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:46:37,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-20 15:46:37,991 INFO L175 Difference]: Start difference. First operand has 363 places, 470 transitions, 5186 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:46:37,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 493 transitions, 6332 flow [2024-06-20 15:46:41,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 493 transitions, 6164 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:41,816 INFO L231 Difference]: Finished difference. Result has 365 places, 473 transitions, 5268 flow [2024-06-20 15:46:41,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5018, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5268, PETRI_PLACES=365, PETRI_TRANSITIONS=473} [2024-06-20 15:46:41,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-20 15:46:41,817 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 473 transitions, 5268 flow [2024-06-20 15:46:41,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:41,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:41,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:46:41,817 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:41,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2021252942, now seen corresponding path program 1 times [2024-06-20 15:46:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968362258] [2024-06-20 15:46:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:42,905 INFO 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 15:46:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968362258] [2024-06-20 15:46:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968362258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:42,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960214303] [2024-06-20 15:46:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:42,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:42,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:42,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 473 transitions, 5268 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:42,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:42,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:42,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:44,600 INFO L124 PetriNetUnfolderBase]: 4237/6825 cut-off events. [2024-06-20 15:46:44,600 INFO L125 PetriNetUnfolderBase]: For 1666011/1666018 co-relation queries the response was YES. [2024-06-20 15:46:44,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72446 conditions, 6825 events. 4237/6825 cut-off events. For 1666011/1666018 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43068 event pairs, 826 based on Foata normal form. 7/6830 useless extension candidates. Maximal degree in co-relation 72275. Up to 6445 conditions per place. [2024-06-20 15:46:44,711 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 463 selfloop transitions, 30 changer transitions 0/498 dead transitions. [2024-06-20 15:46:44,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 498 transitions, 6426 flow [2024-06-20 15:46:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:46:44,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-20 15:46:44,712 INFO L175 Difference]: Start difference. First operand has 365 places, 473 transitions, 5268 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:46:44,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 498 transitions, 6426 flow [2024-06-20 15:46:48,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 498 transitions, 6198 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:48,134 INFO L231 Difference]: Finished difference. Result has 367 places, 476 transitions, 5210 flow [2024-06-20 15:46:48,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5210, PETRI_PLACES=367, PETRI_TRANSITIONS=476} [2024-06-20 15:46:48,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-20 15:46:48,135 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 476 transitions, 5210 flow [2024-06-20 15:46:48,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:48,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:48,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:48,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:46:48,135 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:48,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1281032024, now seen corresponding path program 5 times [2024-06-20 15:46:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:48,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142264066] [2024-06-20 15:46:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:49,104 INFO 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 15:46:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142264066] [2024-06-20 15:46:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142264066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:49,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:49,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066875159] [2024-06-20 15:46:49,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:49,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:49,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 476 transitions, 5210 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:49,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:49,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:49,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:50,770 INFO L124 PetriNetUnfolderBase]: 4250/6846 cut-off events. [2024-06-20 15:46:50,770 INFO L125 PetriNetUnfolderBase]: For 1698872/1698875 co-relation queries the response was YES. [2024-06-20 15:46:50,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73183 conditions, 6846 events. 4250/6846 cut-off events. For 1698872/1698875 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 43168 event pairs, 834 based on Foata normal form. 3/6847 useless extension candidates. Maximal degree in co-relation 73011. Up to 6312 conditions per place. [2024-06-20 15:46:50,884 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 85 changer transitions 0/502 dead transitions. [2024-06-20 15:46:51,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 502 transitions, 7005 flow [2024-06-20 15:46:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:46:51,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-20 15:46:51,065 INFO L175 Difference]: Start difference. First operand has 367 places, 476 transitions, 5210 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:46:51,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 502 transitions, 7005 flow [2024-06-20 15:46:54,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 502 transitions, 6857 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:54,663 INFO L231 Difference]: Finished difference. Result has 370 places, 484 transitions, 5503 flow [2024-06-20 15:46:54,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5503, PETRI_PLACES=370, PETRI_TRANSITIONS=484} [2024-06-20 15:46:54,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-20 15:46:54,664 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 484 transitions, 5503 flow [2024-06-20 15:46:54,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:54,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:54,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:54,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:46:54,664 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:54,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1280614950, now seen corresponding path program 2 times [2024-06-20 15:46:54,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:54,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931392788] [2024-06-20 15:46:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:54,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:55,837 INFO 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 15:46:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931392788] [2024-06-20 15:46:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931392788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:55,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:46:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393122651] [2024-06-20 15:46:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:55,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:46:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:46:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:46:55,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:55,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 484 transitions, 5503 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:55,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:55,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:55,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:57,686 INFO L124 PetriNetUnfolderBase]: 4263/6864 cut-off events. [2024-06-20 15:46:57,686 INFO L125 PetriNetUnfolderBase]: For 1737917/1737924 co-relation queries the response was YES. [2024-06-20 15:46:57,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74189 conditions, 6864 events. 4263/6864 cut-off events. For 1737917/1737924 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43294 event pairs, 822 based on Foata normal form. 7/6869 useless extension candidates. Maximal degree in co-relation 74015. Up to 6456 conditions per place. [2024-06-20 15:46:57,789 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 458 selfloop transitions, 46 changer transitions 0/509 dead transitions. [2024-06-20 15:46:57,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 509 transitions, 7039 flow [2024-06-20 15:46:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:46:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:46:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:46:57,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-20 15:46:57,790 INFO L175 Difference]: Start difference. First operand has 370 places, 484 transitions, 5503 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:46:57,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 509 transitions, 7039 flow [2024-06-20 15:47:00,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 509 transitions, 6748 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:00,699 INFO L231 Difference]: Finished difference. Result has 373 places, 490 transitions, 5528 flow [2024-06-20 15:47:00,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5528, PETRI_PLACES=373, PETRI_TRANSITIONS=490} [2024-06-20 15:47:00,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-20 15:47:00,700 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 490 transitions, 5528 flow [2024-06-20 15:47:00,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:00,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:00,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:00,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:47:00,700 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:00,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1280882294, now seen corresponding path program 6 times [2024-06-20 15:47:00,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:00,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929968779] [2024-06-20 15:47:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:00,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:01,675 INFO 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 15:47:01,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929968779] [2024-06-20 15:47:01,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929968779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:01,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:01,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:01,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160052697] [2024-06-20 15:47:01,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:01,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:01,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:01,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:01,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 490 transitions, 5528 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:01,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:01,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:03,514 INFO L124 PetriNetUnfolderBase]: 4268/6873 cut-off events. [2024-06-20 15:47:03,514 INFO L125 PetriNetUnfolderBase]: For 1761724/1761727 co-relation queries the response was YES. [2024-06-20 15:47:03,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74268 conditions, 6873 events. 4268/6873 cut-off events. For 1761724/1761727 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43366 event pairs, 840 based on Foata normal form. 3/6874 useless extension candidates. Maximal degree in co-relation 74093. Up to 6336 conditions per place. [2024-06-20 15:47:03,614 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 418 selfloop transitions, 87 changer transitions 0/510 dead transitions. [2024-06-20 15:47:03,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 510 transitions, 6941 flow [2024-06-20 15:47:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:47:03,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:47:03,615 INFO L175 Difference]: Start difference. First operand has 373 places, 490 transitions, 5528 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:47:03,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 510 transitions, 6941 flow [2024-06-20 15:47:07,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 510 transitions, 6776 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:07,412 INFO L231 Difference]: Finished difference. Result has 377 places, 493 transitions, 5640 flow [2024-06-20 15:47:07,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5640, PETRI_PLACES=377, PETRI_TRANSITIONS=493} [2024-06-20 15:47:07,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-20 15:47:07,413 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 493 transitions, 5640 flow [2024-06-20 15:47:07,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:07,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:07,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:07,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:47:07,413 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:07,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1780339773, now seen corresponding path program 3 times [2024-06-20 15:47:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904268078] [2024-06-20 15:47:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:07,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:08,388 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 15:47:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904268078] [2024-06-20 15:47:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904268078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:08,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:08,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596241751] [2024-06-20 15:47:08,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:08,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:08,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 493 transitions, 5640 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:08,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:08,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:08,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:10,213 INFO L124 PetriNetUnfolderBase]: 4294/6910 cut-off events. [2024-06-20 15:47:10,213 INFO L125 PetriNetUnfolderBase]: For 1815152/1815159 co-relation queries the response was YES. [2024-06-20 15:47:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75423 conditions, 6910 events. 4294/6910 cut-off events. For 1815152/1815159 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43551 event pairs, 827 based on Foata normal form. 8/6915 useless extension candidates. Maximal degree in co-relation 75246. Up to 6439 conditions per place. [2024-06-20 15:47:10,317 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 52 changer transitions 0/520 dead transitions. [2024-06-20 15:47:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 520 transitions, 7250 flow [2024-06-20 15:47:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:47:10,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-20 15:47:10,318 INFO L175 Difference]: Start difference. First operand has 377 places, 493 transitions, 5640 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:47:10,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 520 transitions, 7250 flow [2024-06-20 15:47:13,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 520 transitions, 7041 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:13,905 INFO L231 Difference]: Finished difference. Result has 380 places, 499 transitions, 5775 flow [2024-06-20 15:47:13,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5775, PETRI_PLACES=380, PETRI_TRANSITIONS=499} [2024-06-20 15:47:13,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-20 15:47:13,906 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 499 transitions, 5775 flow [2024-06-20 15:47:13,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:13,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:13,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:13,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:47:13,906 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:13,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash -666677790, now seen corresponding path program 3 times [2024-06-20 15:47:13,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:13,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720727152] [2024-06-20 15:47:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:15,001 INFO 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 15:47:15,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720727152] [2024-06-20 15:47:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720727152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:15,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:15,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:47:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055078208] [2024-06-20 15:47:15,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:47:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:47:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:47:15,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:15,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 499 transitions, 5775 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:15,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:15,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:15,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:16,789 INFO L124 PetriNetUnfolderBase]: 4299/6926 cut-off events. [2024-06-20 15:47:16,789 INFO L125 PetriNetUnfolderBase]: For 1839296/1839303 co-relation queries the response was YES. [2024-06-20 15:47:16,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76081 conditions, 6926 events. 4299/6926 cut-off events. For 1839296/1839303 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43844 event pairs, 833 based on Foata normal form. 7/6931 useless extension candidates. Maximal degree in co-relation 75903. Up to 6518 conditions per place. [2024-06-20 15:47:16,893 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 477 selfloop transitions, 38 changer transitions 0/520 dead transitions. [2024-06-20 15:47:16,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 520 transitions, 6949 flow [2024-06-20 15:47:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:47:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:47:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:47:16,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 15:47:16,894 INFO L175 Difference]: Start difference. First operand has 380 places, 499 transitions, 5775 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:47:16,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 520 transitions, 6949 flow [2024-06-20 15:47:20,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 520 transitions, 6795 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-20 15:47:20,377 INFO L231 Difference]: Finished difference. Result has 384 places, 502 transitions, 5795 flow [2024-06-20 15:47:20,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5795, PETRI_PLACES=384, PETRI_TRANSITIONS=502} [2024-06-20 15:47:20,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-20 15:47:20,377 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 502 transitions, 5795 flow [2024-06-20 15:47:20,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:20,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:20,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:47:20,377 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:20,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1460585831, now seen corresponding path program 2 times [2024-06-20 15:47:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785976991] [2024-06-20 15:47:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:47:21,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:21,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785976991] [2024-06-20 15:47:21,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785976991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:21,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:21,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:47:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603638596] [2024-06-20 15:47:21,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:21,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:47:21,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:21,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:47:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:47:21,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:21,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 502 transitions, 5795 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:21,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:21,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:21,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:23,850 INFO L124 PetriNetUnfolderBase]: 4422/7138 cut-off events. [2024-06-20 15:47:23,850 INFO L125 PetriNetUnfolderBase]: For 1935108/1935111 co-relation queries the response was YES. [2024-06-20 15:47:23,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77819 conditions, 7138 events. 4422/7138 cut-off events. For 1935108/1935111 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45496 event pairs, 819 based on Foata normal form. 12/7146 useless extension candidates. Maximal degree in co-relation 77639. Up to 5813 conditions per place. [2024-06-20 15:47:23,966 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 419 selfloop transitions, 135 changer transitions 0/559 dead transitions. [2024-06-20 15:47:23,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 559 transitions, 7327 flow [2024-06-20 15:47:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:47:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:47:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-20 15:47:23,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-20 15:47:23,967 INFO L175 Difference]: Start difference. First operand has 384 places, 502 transitions, 5795 flow. Second operand 11 states and 223 transitions. [2024-06-20 15:47:23,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 559 transitions, 7327 flow [2024-06-20 15:47:28,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 559 transitions, 7181 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:28,402 INFO L231 Difference]: Finished difference. Result has 391 places, 510 transitions, 6123 flow [2024-06-20 15:47:28,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6123, PETRI_PLACES=391, PETRI_TRANSITIONS=510} [2024-06-20 15:47:28,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-20 15:47:28,402 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 510 transitions, 6123 flow [2024-06-20 15:47:28,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:28,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:28,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:28,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:47:28,403 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:28,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2015632853, now seen corresponding path program 3 times [2024-06-20 15:47:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:28,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259986278] [2024-06-20 15:47:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:29,725 INFO 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 15:47:29,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:29,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259986278] [2024-06-20 15:47:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259986278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:29,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:29,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:47:29,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122669006] [2024-06-20 15:47:29,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:29,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:47:29,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:47:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:47:29,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:29,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 510 transitions, 6123 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:29,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:29,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:29,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:32,065 INFO L124 PetriNetUnfolderBase]: 4532/7338 cut-off events. [2024-06-20 15:47:32,066 INFO L125 PetriNetUnfolderBase]: For 1980676/1980679 co-relation queries the response was YES. [2024-06-20 15:47:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80385 conditions, 7338 events. 4532/7338 cut-off events. For 1980676/1980679 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47289 event pairs, 844 based on Foata normal form. 12/7346 useless extension candidates. Maximal degree in co-relation 80202. Up to 6086 conditions per place. [2024-06-20 15:47:32,194 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 412 selfloop transitions, 148 changer transitions 0/565 dead transitions. [2024-06-20 15:47:32,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 565 transitions, 7647 flow [2024-06-20 15:47:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:47:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:47:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-20 15:47:32,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-20 15:47:32,195 INFO L175 Difference]: Start difference. First operand has 391 places, 510 transitions, 6123 flow. Second operand 11 states and 221 transitions. [2024-06-20 15:47:32,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 565 transitions, 7647 flow [2024-06-20 15:47:36,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 565 transitions, 7313 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 15:47:36,495 INFO L231 Difference]: Finished difference. Result has 398 places, 518 transitions, 6307 flow [2024-06-20 15:47:36,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6307, PETRI_PLACES=398, PETRI_TRANSITIONS=518} [2024-06-20 15:47:36,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-20 15:47:36,495 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 518 transitions, 6307 flow [2024-06-20 15:47:36,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:36,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:36,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:36,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:47:36,496 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:36,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1793987813, now seen corresponding path program 4 times [2024-06-20 15:47:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624087882] [2024-06-20 15:47:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:37,732 INFO 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 15:47:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:37,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624087882] [2024-06-20 15:47:37,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624087882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:37,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:37,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:47:37,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360442849] [2024-06-20 15:47:37,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:37,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:47:37,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:47:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:47:37,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:37,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 518 transitions, 6307 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:37,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:37,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:37,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:40,046 INFO L124 PetriNetUnfolderBase]: 4614/7500 cut-off events. [2024-06-20 15:47:40,046 INFO L125 PetriNetUnfolderBase]: For 2015903/2015906 co-relation queries the response was YES. [2024-06-20 15:47:40,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81935 conditions, 7500 events. 4614/7500 cut-off events. For 2015903/2015906 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 48795 event pairs, 874 based on Foata normal form. 12/7508 useless extension candidates. Maximal degree in co-relation 81749. Up to 6228 conditions per place. [2024-06-20 15:47:40,172 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 418 selfloop transitions, 144 changer transitions 0/567 dead transitions. [2024-06-20 15:47:40,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 567 transitions, 7780 flow [2024-06-20 15:47:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:47:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:47:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-20 15:47:40,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-20 15:47:40,173 INFO L175 Difference]: Start difference. First operand has 398 places, 518 transitions, 6307 flow. Second operand 11 states and 222 transitions. [2024-06-20 15:47:40,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 567 transitions, 7780 flow [2024-06-20 15:47:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 567 transitions, 7472 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 15:47:44,350 INFO L231 Difference]: Finished difference. Result has 405 places, 520 transitions, 6420 flow [2024-06-20 15:47:44,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6420, PETRI_PLACES=405, PETRI_TRANSITIONS=520} [2024-06-20 15:47:44,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-20 15:47:44,351 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 520 transitions, 6420 flow [2024-06-20 15:47:44,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:44,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:44,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:44,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:47:44,351 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:44,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2023964723, now seen corresponding path program 5 times [2024-06-20 15:47:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:44,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558050162] [2024-06-20 15:47:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:45,548 INFO 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 15:47:45,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558050162] [2024-06-20 15:47:45,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558050162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:45,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:45,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:47:45,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615332655] [2024-06-20 15:47:45,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:45,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:47:45,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:45,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:47:45,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:47:45,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:47:45,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 520 transitions, 6420 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:45,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:45,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:47:45,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:48,052 INFO L124 PetriNetUnfolderBase]: 4655/7581 cut-off events. [2024-06-20 15:47:48,053 INFO L125 PetriNetUnfolderBase]: For 2045580/2045583 co-relation queries the response was YES. [2024-06-20 15:47:48,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82121 conditions, 7581 events. 4655/7581 cut-off events. For 2045580/2045583 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49604 event pairs, 878 based on Foata normal form. 12/7589 useless extension candidates. Maximal degree in co-relation 81933. Up to 5376 conditions per place. [2024-06-20 15:47:48,167 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 401 selfloop transitions, 163 changer transitions 0/569 dead transitions. [2024-06-20 15:47:48,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 569 transitions, 7874 flow [2024-06-20 15:47:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:47:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:47:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-20 15:47:48,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-20 15:47:48,168 INFO L175 Difference]: Start difference. First operand has 405 places, 520 transitions, 6420 flow. Second operand 11 states and 221 transitions. [2024-06-20 15:47:48,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 569 transitions, 7874 flow [2024-06-20 15:47:53,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 569 transitions, 7470 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-20 15:47:53,026 INFO L231 Difference]: Finished difference. Result has 407 places, 521 transitions, 6442 flow [2024-06-20 15:47:53,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6442, PETRI_PLACES=407, PETRI_TRANSITIONS=521} [2024-06-20 15:47:53,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-20 15:47:53,027 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 521 transitions, 6442 flow [2024-06-20 15:47:53,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:53,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:47:53,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:47:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:47:53,027 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:47:53,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:47:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2067202150, now seen corresponding path program 2 times [2024-06-20 15:47:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:47:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062545623] [2024-06-20 15:47:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:47:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:47:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:47:54,263 INFO 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 15:47:54,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:47:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062545623] [2024-06-20 15:47:54,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062545623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:47:54,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:47:54,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:47:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755183260] [2024-06-20 15:47:54,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:47:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:47:54,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:47:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:47:54,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:47:54,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:47:54,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 521 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:47:54,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:47:54,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:47:54,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:47:56,258 INFO L124 PetriNetUnfolderBase]: 4280/7141 cut-off events. [2024-06-20 15:47:56,258 INFO L125 PetriNetUnfolderBase]: For 2047102/2047117 co-relation queries the response was YES. [2024-06-20 15:47:56,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79639 conditions, 7141 events. 4280/7141 cut-off events. For 2047102/2047117 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48380 event pairs, 851 based on Foata normal form. 13/7064 useless extension candidates. Maximal degree in co-relation 79452. Up to 6141 conditions per place. [2024-06-20 15:47:56,379 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 402 selfloop transitions, 35 changer transitions 0/544 dead transitions. [2024-06-20 15:47:56,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 544 transitions, 7482 flow [2024-06-20 15:47:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:47:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:47:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:47:56,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:47:56,380 INFO L175 Difference]: Start difference. First operand has 407 places, 521 transitions, 6442 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:47:56,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 544 transitions, 7482 flow [2024-06-20 15:48:00,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 544 transitions, 7078 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-20 15:48:00,380 INFO L231 Difference]: Finished difference. Result has 407 places, 524 transitions, 6218 flow [2024-06-20 15:48:00,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6038, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6218, PETRI_PLACES=407, PETRI_TRANSITIONS=524} [2024-06-20 15:48:00,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-20 15:48:00,380 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 524 transitions, 6218 flow [2024-06-20 15:48:00,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:00,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:00,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:48:00,381 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:00,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1280605526, now seen corresponding path program 3 times [2024-06-20 15:48:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480181745] [2024-06-20 15:48:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:01,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:01,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480181745] [2024-06-20 15:48:01,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480181745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:01,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:01,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:01,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034907082] [2024-06-20 15:48:01,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:01,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:01,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:01,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:01,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:01,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:48:01,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 524 transitions, 6218 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:01,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:01,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:48:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:03,729 INFO L124 PetriNetUnfolderBase]: 4291/7161 cut-off events. [2024-06-20 15:48:03,729 INFO L125 PetriNetUnfolderBase]: For 2061850/2061893 co-relation queries the response was YES. [2024-06-20 15:48:03,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79599 conditions, 7161 events. 4291/7161 cut-off events. For 2061850/2061893 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 48527 event pairs, 852 based on Foata normal form. 23/7093 useless extension candidates. Maximal degree in co-relation 79411. Up to 6134 conditions per place. [2024-06-20 15:48:03,856 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 52 changer transitions 0/555 dead transitions. [2024-06-20 15:48:03,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 555 transitions, 7737 flow [2024-06-20 15:48:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:48:03,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-20 15:48:03,857 INFO L175 Difference]: Start difference. First operand has 407 places, 524 transitions, 6218 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:48:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 555 transitions, 7737 flow [2024-06-20 15:48:07,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 555 transitions, 7511 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:07,792 INFO L231 Difference]: Finished difference. Result has 410 places, 535 transitions, 6421 flow [2024-06-20 15:48:07,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6421, PETRI_PLACES=410, PETRI_TRANSITIONS=535} [2024-06-20 15:48:07,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-20 15:48:07,792 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 535 transitions, 6421 flow [2024-06-20 15:48:07,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:07,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:07,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:07,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:48:07,793 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:07,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1280619476, now seen corresponding path program 4 times [2024-06-20 15:48:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:07,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42544323] [2024-06-20 15:48:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:09,195 INFO 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 15:48:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42544323] [2024-06-20 15:48:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42544323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:09,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:09,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:48:09,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319622780] [2024-06-20 15:48:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:09,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:48:09,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:48:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:48:09,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 15:48:09,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 535 transitions, 6421 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:09,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:09,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 15:48:09,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:11,235 INFO L124 PetriNetUnfolderBase]: 4296/7162 cut-off events. [2024-06-20 15:48:11,235 INFO L125 PetriNetUnfolderBase]: For 2075909/2075964 co-relation queries the response was YES. [2024-06-20 15:48:11,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79858 conditions, 7162 events. 4296/7162 cut-off events. For 2075909/2075964 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 48440 event pairs, 851 based on Foata normal form. 18/7089 useless extension candidates. Maximal degree in co-relation 79668. Up to 6140 conditions per place. [2024-06-20 15:48:11,367 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 397 selfloop transitions, 51 changer transitions 0/555 dead transitions. [2024-06-20 15:48:11,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 555 transitions, 7388 flow [2024-06-20 15:48:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:48:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:48:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:48:11,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-20 15:48:11,369 INFO L175 Difference]: Start difference. First operand has 410 places, 535 transitions, 6421 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:48:11,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 555 transitions, 7388 flow [2024-06-20 15:48:15,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 555 transitions, 7162 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:15,447 INFO L231 Difference]: Finished difference. Result has 414 places, 536 transitions, 6316 flow [2024-06-20 15:48:15,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6201, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=414, PETRI_TRANSITIONS=536} [2024-06-20 15:48:15,447 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-20 15:48:15,447 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 536 transitions, 6316 flow [2024-06-20 15:48:15,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:15,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:15,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:48:15,448 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:15,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash -192837503, now seen corresponding path program 4 times [2024-06-20 15:48:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:15,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160797350] [2024-06-20 15:48:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160797350] [2024-06-20 15:48:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160797350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:16,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:16,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:16,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774657217] [2024-06-20 15:48:16,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:16,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:16,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:16,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:48:16,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 536 transitions, 6316 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:16,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:16,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:48:16,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:18,334 INFO L124 PetriNetUnfolderBase]: 4705/7672 cut-off events. [2024-06-20 15:48:18,334 INFO L125 PetriNetUnfolderBase]: For 2085559/2085570 co-relation queries the response was YES. [2024-06-20 15:48:18,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83141 conditions, 7672 events. 4705/7672 cut-off events. For 2085559/2085570 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50488 event pairs, 921 based on Foata normal form. 10/7679 useless extension candidates. Maximal degree in co-relation 82949. Up to 7170 conditions per place. [2024-06-20 15:48:18,479 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 520 selfloop transitions, 38 changer transitions 0/563 dead transitions. [2024-06-20 15:48:18,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 563 transitions, 7634 flow [2024-06-20 15:48:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:48:18,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:48:18,480 INFO L175 Difference]: Start difference. First operand has 414 places, 536 transitions, 6316 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:48:18,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 563 transitions, 7634 flow [2024-06-20 15:48:23,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 563 transitions, 7535 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:23,685 INFO L231 Difference]: Finished difference. Result has 416 places, 539 transitions, 6413 flow [2024-06-20 15:48:23,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6413, PETRI_PLACES=416, PETRI_TRANSITIONS=539} [2024-06-20 15:48:23,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-20 15:48:23,685 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 539 transitions, 6413 flow [2024-06-20 15:48:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:23,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:23,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:48:23,686 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:23,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash 84781311, now seen corresponding path program 5 times [2024-06-20 15:48:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077579389] [2024-06-20 15:48:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:24,590 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 15:48:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:24,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077579389] [2024-06-20 15:48:24,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077579389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:24,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734971332] [2024-06-20 15:48:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:24,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:48:24,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 539 transitions, 6413 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:24,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:24,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:48:24,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:26,668 INFO L124 PetriNetUnfolderBase]: 4731/7708 cut-off events. [2024-06-20 15:48:26,668 INFO L125 PetriNetUnfolderBase]: For 2137209/2137220 co-relation queries the response was YES. [2024-06-20 15:48:26,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84212 conditions, 7708 events. 4731/7708 cut-off events. For 2137209/2137220 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50659 event pairs, 918 based on Foata normal form. 10/7715 useless extension candidates. Maximal degree in co-relation 84019. Up to 7177 conditions per place. [2024-06-20 15:48:27,012 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 514 selfloop transitions, 49 changer transitions 0/568 dead transitions. [2024-06-20 15:48:27,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 568 transitions, 8155 flow [2024-06-20 15:48:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:48:27,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:48:27,013 INFO L175 Difference]: Start difference. First operand has 416 places, 539 transitions, 6413 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:48:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 568 transitions, 8155 flow [2024-06-20 15:48:32,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 568 transitions, 7953 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-20 15:48:32,579 INFO L231 Difference]: Finished difference. Result has 417 places, 545 transitions, 6577 flow [2024-06-20 15:48:32,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6577, PETRI_PLACES=417, PETRI_TRANSITIONS=545} [2024-06-20 15:48:32,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-20 15:48:32,580 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 545 transitions, 6577 flow [2024-06-20 15:48:32,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:32,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:32,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:32,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:48:32,580 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:32,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash 686205600, now seen corresponding path program 7 times [2024-06-20 15:48:32,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:32,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137407810] [2024-06-20 15:48:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:32,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:33,406 INFO 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 15:48:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:33,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137407810] [2024-06-20 15:48:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137407810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:33,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:33,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690011319] [2024-06-20 15:48:33,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:33,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:33,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:33,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:48:33,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 545 transitions, 6577 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:33,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:33,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:48:33,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:35,606 INFO L124 PetriNetUnfolderBase]: 4728/7706 cut-off events. [2024-06-20 15:48:35,606 INFO L125 PetriNetUnfolderBase]: For 2147954/2147959 co-relation queries the response was YES. [2024-06-20 15:48:35,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84635 conditions, 7706 events. 4728/7706 cut-off events. For 2147954/2147959 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50621 event pairs, 925 based on Foata normal form. 5/7705 useless extension candidates. Maximal degree in co-relation 84440. Up to 7151 conditions per place. [2024-06-20 15:48:35,732 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 504 selfloop transitions, 58 changer transitions 0/567 dead transitions. [2024-06-20 15:48:35,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 567 transitions, 7795 flow [2024-06-20 15:48:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:48:35,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:48:35,733 INFO L175 Difference]: Start difference. First operand has 417 places, 545 transitions, 6577 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:48:35,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 567 transitions, 7795 flow [2024-06-20 15:48:39,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 567 transitions, 7519 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-20 15:48:39,938 INFO L231 Difference]: Finished difference. Result has 420 places, 546 transitions, 6451 flow [2024-06-20 15:48:39,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6451, PETRI_PLACES=420, PETRI_TRANSITIONS=546} [2024-06-20 15:48:39,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-20 15:48:39,938 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 546 transitions, 6451 flow [2024-06-20 15:48:39,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:39,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:39,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:48:39,938 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:39,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -838723661, now seen corresponding path program 6 times [2024-06-20 15:48:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048980674] [2024-06-20 15:48:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048980674] [2024-06-20 15:48:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048980674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:40,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:40,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640941002] [2024-06-20 15:48:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:40,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:40,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:40,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:48:40,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 546 transitions, 6451 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:40,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:40,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:48:40,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:42,913 INFO L124 PetriNetUnfolderBase]: 4722/7707 cut-off events. [2024-06-20 15:48:42,913 INFO L125 PetriNetUnfolderBase]: For 2164047/2164058 co-relation queries the response was YES. [2024-06-20 15:48:43,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84195 conditions, 7707 events. 4722/7707 cut-off events. For 2164047/2164058 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50771 event pairs, 929 based on Foata normal form. 10/7714 useless extension candidates. Maximal degree in co-relation 83999. Up to 7194 conditions per place. [2024-06-20 15:48:43,044 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 530 selfloop transitions, 36 changer transitions 0/571 dead transitions. [2024-06-20 15:48:43,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 571 transitions, 7683 flow [2024-06-20 15:48:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:48:43,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-20 15:48:43,045 INFO L175 Difference]: Start difference. First operand has 420 places, 546 transitions, 6451 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:48:43,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 571 transitions, 7683 flow [2024-06-20 15:48:48,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 571 transitions, 7489 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 15:48:48,624 INFO L231 Difference]: Finished difference. Result has 422 places, 546 transitions, 6335 flow [2024-06-20 15:48:48,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6257, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6335, PETRI_PLACES=422, PETRI_TRANSITIONS=546} [2024-06-20 15:48:48,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-20 15:48:48,625 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 546 transitions, 6335 flow [2024-06-20 15:48:48,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:48,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:48,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:48,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:48:48,625 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:48,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash 686564084, now seen corresponding path program 4 times [2024-06-20 15:48:48,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:48,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136631734] [2024-06-20 15:48:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:48,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:49,722 INFO 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 15:48:49,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:49,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136631734] [2024-06-20 15:48:49,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136631734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:49,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:49,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:49,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255520552] [2024-06-20 15:48:49,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:49,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:49,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:48:49,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 546 transitions, 6335 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:49,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:49,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:48:49,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:48:51,788 INFO L124 PetriNetUnfolderBase]: 4719/7693 cut-off events. [2024-06-20 15:48:51,788 INFO L125 PetriNetUnfolderBase]: For 2170741/2170752 co-relation queries the response was YES. [2024-06-20 15:48:51,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83996 conditions, 7693 events. 4719/7693 cut-off events. For 2170741/2170752 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50626 event pairs, 919 based on Foata normal form. 9/7699 useless extension candidates. Maximal degree in co-relation 83799. Up to 7232 conditions per place. [2024-06-20 15:48:51,921 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 531 selfloop transitions, 30 changer transitions 0/566 dead transitions. [2024-06-20 15:48:51,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 566 transitions, 7527 flow [2024-06-20 15:48:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:48:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:48:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:48:51,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-20 15:48:51,922 INFO L175 Difference]: Start difference. First operand has 422 places, 546 transitions, 6335 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:48:51,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 566 transitions, 7527 flow [2024-06-20 15:48:57,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 566 transitions, 7371 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 15:48:57,458 INFO L231 Difference]: Finished difference. Result has 423 places, 546 transitions, 6245 flow [2024-06-20 15:48:57,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6245, PETRI_PLACES=423, PETRI_TRANSITIONS=546} [2024-06-20 15:48:57,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-20 15:48:57,458 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 546 transitions, 6245 flow [2024-06-20 15:48:57,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:57,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:48:57,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:48:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:48:57,459 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:48:57,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:48:57,459 INFO L85 PathProgramCache]: Analyzing trace with hash -462075510, now seen corresponding path program 8 times [2024-06-20 15:48:57,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:48:57,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20892130] [2024-06-20 15:48:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:48:57,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:48:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:48:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:48:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:48:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20892130] [2024-06-20 15:48:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20892130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:48:58,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:48:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:48:58,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091139868] [2024-06-20 15:48:58,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:48:58,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:48:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:48:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:48:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:48:58,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:48:58,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 546 transitions, 6245 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:48:58,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:48:58,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:48:58,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:00,426 INFO L124 PetriNetUnfolderBase]: 4716/7700 cut-off events. [2024-06-20 15:49:00,426 INFO L125 PetriNetUnfolderBase]: For 2188539/2188544 co-relation queries the response was YES. [2024-06-20 15:49:00,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83901 conditions, 7700 events. 4716/7700 cut-off events. For 2188539/2188544 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50720 event pairs, 936 based on Foata normal form. 5/7699 useless extension candidates. Maximal degree in co-relation 83703. Up to 7127 conditions per place. [2024-06-20 15:49:00,562 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 498 selfloop transitions, 62 changer transitions 0/565 dead transitions. [2024-06-20 15:49:00,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 565 transitions, 7447 flow [2024-06-20 15:49:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:49:00,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-20 15:49:00,563 INFO L175 Difference]: Start difference. First operand has 423 places, 546 transitions, 6245 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:49:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 565 transitions, 7447 flow [2024-06-20 15:49:05,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 565 transitions, 7261 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 15:49:05,331 INFO L231 Difference]: Finished difference. Result has 424 places, 547 transitions, 6215 flow [2024-06-20 15:49:05,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6215, PETRI_PLACES=424, PETRI_TRANSITIONS=547} [2024-06-20 15:49:05,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-20 15:49:05,332 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 547 transitions, 6215 flow [2024-06-20 15:49:05,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:05,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:05,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:05,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:49:05,332 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:05,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash 686563867, now seen corresponding path program 7 times [2024-06-20 15:49:05,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:05,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342672375] [2024-06-20 15:49:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:05,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:06,249 INFO 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 15:49:06,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:06,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342672375] [2024-06-20 15:49:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342672375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:06,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687730907] [2024-06-20 15:49:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:06,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:06,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 547 transitions, 6215 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:06,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:06,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:06,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:08,574 INFO L124 PetriNetUnfolderBase]: 4710/7691 cut-off events. [2024-06-20 15:49:08,574 INFO L125 PetriNetUnfolderBase]: For 2206154/2206165 co-relation queries the response was YES. [2024-06-20 15:49:08,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83690 conditions, 7691 events. 4710/7691 cut-off events. For 2206154/2206165 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 50728 event pairs, 928 based on Foata normal form. 10/7698 useless extension candidates. Maximal degree in co-relation 83491. Up to 7161 conditions per place. [2024-06-20 15:49:08,693 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 522 selfloop transitions, 43 changer transitions 0/570 dead transitions. [2024-06-20 15:49:08,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 570 transitions, 7451 flow [2024-06-20 15:49:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:49:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:49:08,694 INFO L175 Difference]: Start difference. First operand has 424 places, 547 transitions, 6215 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:49:08,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 570 transitions, 7451 flow [2024-06-20 15:49:14,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 570 transitions, 7263 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:14,387 INFO L231 Difference]: Finished difference. Result has 426 places, 547 transitions, 6119 flow [2024-06-20 15:49:14,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6027, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6119, PETRI_PLACES=426, PETRI_TRANSITIONS=547} [2024-06-20 15:49:14,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-20 15:49:14,388 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 547 transitions, 6119 flow [2024-06-20 15:49:14,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:14,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:14,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:49:14,388 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:14,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 337407491, now seen corresponding path program 8 times [2024-06-20 15:49:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:14,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657668297] [2024-06-20 15:49:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:15,348 INFO 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 15:49:15,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:15,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657668297] [2024-06-20 15:49:15,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657668297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:15,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:15,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424603739] [2024-06-20 15:49:15,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:15,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:15,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 547 transitions, 6119 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:15,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:15,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:17,462 INFO L124 PetriNetUnfolderBase]: 4736/7718 cut-off events. [2024-06-20 15:49:17,462 INFO L125 PetriNetUnfolderBase]: For 2258517/2258528 co-relation queries the response was YES. [2024-06-20 15:49:17,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84642 conditions, 7718 events. 4736/7718 cut-off events. For 2258517/2258528 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50783 event pairs, 916 based on Foata normal form. 10/7725 useless extension candidates. Maximal degree in co-relation 84442. Up to 7137 conditions per place. [2024-06-20 15:49:17,591 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 501 selfloop transitions, 68 changer transitions 0/574 dead transitions. [2024-06-20 15:49:17,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 574 transitions, 7909 flow [2024-06-20 15:49:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:49:17,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:49:17,592 INFO L175 Difference]: Start difference. First operand has 426 places, 547 transitions, 6119 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:49:17,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 574 transitions, 7909 flow [2024-06-20 15:49:23,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 574 transitions, 7736 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:49:23,689 INFO L231 Difference]: Finished difference. Result has 426 places, 553 transitions, 6346 flow [2024-06-20 15:49:23,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5946, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6346, PETRI_PLACES=426, PETRI_TRANSITIONS=553} [2024-06-20 15:49:23,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-20 15:49:23,690 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 553 transitions, 6346 flow [2024-06-20 15:49:23,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:23,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:23,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:49:23,690 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:23,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:23,690 INFO L85 PathProgramCache]: Analyzing trace with hash -48768196, now seen corresponding path program 5 times [2024-06-20 15:49:23,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416677192] [2024-06-20 15:49:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:24,903 INFO 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 15:49:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416677192] [2024-06-20 15:49:24,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416677192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:24,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:24,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951650065] [2024-06-20 15:49:24,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:24,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:25,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:25,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 553 transitions, 6346 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:25,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:25,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:27,016 INFO L124 PetriNetUnfolderBase]: 4741/7725 cut-off events. [2024-06-20 15:49:27,016 INFO L125 PetriNetUnfolderBase]: For 2285296/2285307 co-relation queries the response was YES. [2024-06-20 15:49:27,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85426 conditions, 7725 events. 4741/7725 cut-off events. For 2285296/2285307 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50818 event pairs, 921 based on Foata normal form. 9/7731 useless extension candidates. Maximal degree in co-relation 85226. Up to 7252 conditions per place. [2024-06-20 15:49:27,151 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 530 selfloop transitions, 38 changer transitions 0/573 dead transitions. [2024-06-20 15:49:27,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 573 transitions, 7656 flow [2024-06-20 15:49:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:49:27,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-20 15:49:27,152 INFO L175 Difference]: Start difference. First operand has 426 places, 553 transitions, 6346 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:49:27,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 573 transitions, 7656 flow [2024-06-20 15:49:33,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 573 transitions, 7446 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:33,015 INFO L231 Difference]: Finished difference. Result has 430 places, 556 transitions, 6340 flow [2024-06-20 15:49:33,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6340, PETRI_PLACES=430, PETRI_TRANSITIONS=556} [2024-06-20 15:49:33,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-20 15:49:33,015 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 556 transitions, 6340 flow [2024-06-20 15:49:33,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:33,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:33,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:33,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:49:33,016 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:33,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:33,016 INFO L85 PathProgramCache]: Analyzing trace with hash 337407274, now seen corresponding path program 9 times [2024-06-20 15:49:33,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:33,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442692166] [2024-06-20 15:49:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:33,980 INFO 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 15:49:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:33,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442692166] [2024-06-20 15:49:33,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442692166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:33,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:33,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:33,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231546364] [2024-06-20 15:49:33,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:33,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:34,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:34,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 556 transitions, 6340 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:34,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:34,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:34,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:36,088 INFO L124 PetriNetUnfolderBase]: 4746/7744 cut-off events. [2024-06-20 15:49:36,088 INFO L125 PetriNetUnfolderBase]: For 2311728/2311733 co-relation queries the response was YES. [2024-06-20 15:49:36,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85898 conditions, 7744 events. 4746/7744 cut-off events. For 2311728/2311733 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 51026 event pairs, 938 based on Foata normal form. 5/7743 useless extension candidates. Maximal degree in co-relation 85696. Up to 7138 conditions per place. [2024-06-20 15:49:36,236 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 489 selfloop transitions, 80 changer transitions 0/574 dead transitions. [2024-06-20 15:49:36,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 574 transitions, 7650 flow [2024-06-20 15:49:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:49:36,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 15:49:36,237 INFO L175 Difference]: Start difference. First operand has 430 places, 556 transitions, 6340 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:49:36,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 574 transitions, 7650 flow [2024-06-20 15:49:41,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 574 transitions, 7468 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:41,251 INFO L231 Difference]: Finished difference. Result has 432 places, 559 transitions, 6456 flow [2024-06-20 15:49:41,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6158, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6456, PETRI_PLACES=432, PETRI_TRANSITIONS=559} [2024-06-20 15:49:41,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-20 15:49:41,252 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 559 transitions, 6456 flow [2024-06-20 15:49:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:41,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:41,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:41,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:49:41,252 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:41,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:41,253 INFO L85 PathProgramCache]: Analyzing trace with hash -48292966, now seen corresponding path program 6 times [2024-06-20 15:49:41,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:41,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355038088] [2024-06-20 15:49:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:41,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:42,417 INFO 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 15:49:42,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:42,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355038088] [2024-06-20 15:49:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355038088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:42,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:42,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:42,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853533014] [2024-06-20 15:49:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:42,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:42,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:42,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:42,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 559 transitions, 6456 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:42,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:42,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:42,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:44,549 INFO L124 PetriNetUnfolderBase]: 4751/7751 cut-off events. [2024-06-20 15:49:44,549 INFO L125 PetriNetUnfolderBase]: For 2341832/2341843 co-relation queries the response was YES. [2024-06-20 15:49:44,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86569 conditions, 7751 events. 4751/7751 cut-off events. For 2341832/2341843 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 51073 event pairs, 929 based on Foata normal form. 9/7757 useless extension candidates. Maximal degree in co-relation 86366. Up to 7254 conditions per place. [2024-06-20 15:49:44,678 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 528 selfloop transitions, 49 changer transitions 0/582 dead transitions. [2024-06-20 15:49:44,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 582 transitions, 7834 flow [2024-06-20 15:49:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 15:49:44,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-20 15:49:44,679 INFO L175 Difference]: Start difference. First operand has 432 places, 559 transitions, 6456 flow. Second operand 8 states and 142 transitions. [2024-06-20 15:49:44,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 582 transitions, 7834 flow [2024-06-20 15:49:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 582 transitions, 7558 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:50,463 INFO L231 Difference]: Finished difference. Result has 435 places, 565 transitions, 6476 flow [2024-06-20 15:49:50,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6476, PETRI_PLACES=435, PETRI_TRANSITIONS=565} [2024-06-20 15:49:50,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-20 15:49:50,463 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 565 transitions, 6476 flow [2024-06-20 15:49:50,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:50,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:50,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:49:50,464 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:50,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash -48501503, now seen corresponding path program 9 times [2024-06-20 15:49:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:50,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525031954] [2024-06-20 15:49:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:51,447 INFO 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 15:49:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525031954] [2024-06-20 15:49:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525031954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:51,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:51,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:49:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910545174] [2024-06-20 15:49:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:51,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:49:51,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:49:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:49:51,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:51,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 565 transitions, 6476 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:51,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:51,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:51,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:53,485 INFO L124 PetriNetUnfolderBase]: 4745/7745 cut-off events. [2024-06-20 15:49:53,485 INFO L125 PetriNetUnfolderBase]: For 2362901/2362912 co-relation queries the response was YES. [2024-06-20 15:49:53,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86474 conditions, 7745 events. 4745/7745 cut-off events. For 2362901/2362912 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 51085 event pairs, 926 based on Foata normal form. 10/7752 useless extension candidates. Maximal degree in co-relation 86269. Up to 7153 conditions per place. [2024-06-20 15:49:53,620 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 511 selfloop transitions, 69 changer transitions 0/585 dead transitions. [2024-06-20 15:49:53,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 585 transitions, 7742 flow [2024-06-20 15:49:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:49:53,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-20 15:49:53,621 INFO L175 Difference]: Start difference. First operand has 435 places, 565 transitions, 6476 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:49:53,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 585 transitions, 7742 flow [2024-06-20 15:49:59,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 585 transitions, 7492 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:59,338 INFO L231 Difference]: Finished difference. Result has 439 places, 565 transitions, 6370 flow [2024-06-20 15:49:59,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6226, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6370, PETRI_PLACES=439, PETRI_TRANSITIONS=565} [2024-06-20 15:49:59,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-20 15:49:59,338 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 565 transitions, 6370 flow [2024-06-20 15:49:59,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:59,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:59,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:59,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:49:59,339 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:59,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1840198849, now seen corresponding path program 6 times [2024-06-20 15:49:59,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:59,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043941389] [2024-06-20 15:49:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:59,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:00,567 INFO 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 15:50:00,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:00,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043941389] [2024-06-20 15:50:00,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043941389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:00,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:00,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:50:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123109471] [2024-06-20 15:50:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:00,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:50:00,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:50:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:50:00,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:00,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 565 transitions, 6370 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:00,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:00,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:00,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:03,264 INFO L124 PetriNetUnfolderBase]: 4855/7923 cut-off events. [2024-06-20 15:50:03,264 INFO L125 PetriNetUnfolderBase]: For 2467365/2467365 co-relation queries the response was YES. [2024-06-20 15:50:03,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88229 conditions, 7923 events. 4855/7923 cut-off events. For 2467365/2467365 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 52442 event pairs, 922 based on Foata normal form. 12/7927 useless extension candidates. Maximal degree in co-relation 88022. Up to 6607 conditions per place. [2024-06-20 15:50:03,389 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 456 selfloop transitions, 154 changer transitions 0/615 dead transitions. [2024-06-20 15:50:03,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 615 transitions, 7976 flow [2024-06-20 15:50:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 15:50:03,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-20 15:50:03,390 INFO L175 Difference]: Start difference. First operand has 439 places, 565 transitions, 6370 flow. Second operand 11 states and 217 transitions. [2024-06-20 15:50:03,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 615 transitions, 7976 flow [2024-06-20 15:50:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 615 transitions, 7816 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:08,310 INFO L231 Difference]: Finished difference. Result has 445 places, 571 transitions, 6701 flow [2024-06-20 15:50:08,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6701, PETRI_PLACES=445, PETRI_TRANSITIONS=571} [2024-06-20 15:50:08,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-20 15:50:08,310 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 571 transitions, 6701 flow [2024-06-20 15:50:08,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:08,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:08,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:50:08,311 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:08,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1618553809, now seen corresponding path program 7 times [2024-06-20 15:50:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326323199] [2024-06-20 15:50:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:09,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:09,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326323199] [2024-06-20 15:50:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326323199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:09,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:09,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:50:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530150541] [2024-06-20 15:50:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:09,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:50:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:50:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:50:09,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:09,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 571 transitions, 6701 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:09,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:09,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:09,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:12,279 INFO L124 PetriNetUnfolderBase]: 4965/8133 cut-off events. [2024-06-20 15:50:12,279 INFO L125 PetriNetUnfolderBase]: For 2519843/2519843 co-relation queries the response was YES. [2024-06-20 15:50:12,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90899 conditions, 8133 events. 4965/8133 cut-off events. For 2519843/2519843 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54421 event pairs, 952 based on Foata normal form. 12/8137 useless extension candidates. Maximal degree in co-relation 90689. Up to 6788 conditions per place. [2024-06-20 15:50:12,424 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 459 selfloop transitions, 156 changer transitions 0/620 dead transitions. [2024-06-20 15:50:12,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 620 transitions, 8316 flow [2024-06-20 15:50:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 15:50:12,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-20 15:50:12,425 INFO L175 Difference]: Start difference. First operand has 445 places, 571 transitions, 6701 flow. Second operand 11 states and 219 transitions. [2024-06-20 15:50:12,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 620 transitions, 8316 flow [2024-06-20 15:50:17,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 620 transitions, 7939 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:17,902 INFO L231 Difference]: Finished difference. Result has 451 places, 576 transitions, 6801 flow [2024-06-20 15:50:17,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6801, PETRI_PLACES=451, PETRI_TRANSITIONS=576} [2024-06-20 15:50:17,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-20 15:50:17,903 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 576 transitions, 6801 flow [2024-06-20 15:50:17,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:17,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:17,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:17,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:50:17,904 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:17,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1563743713, now seen corresponding path program 8 times [2024-06-20 15:50:17,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:17,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607632818] [2024-06-20 15:50:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:19,179 INFO 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 15:50:19,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:19,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607632818] [2024-06-20 15:50:19,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607632818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:19,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:19,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:50:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466158923] [2024-06-20 15:50:19,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:19,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:50:19,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:50:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:50:19,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:19,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 576 transitions, 6801 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:19,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:19,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:19,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:21,917 INFO L124 PetriNetUnfolderBase]: 5006/8214 cut-off events. [2024-06-20 15:50:21,918 INFO L125 PetriNetUnfolderBase]: For 2554816/2554816 co-relation queries the response was YES. [2024-06-20 15:50:22,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91608 conditions, 8214 events. 5006/8214 cut-off events. For 2554816/2554816 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 55191 event pairs, 962 based on Foata normal form. 12/8218 useless extension candidates. Maximal degree in co-relation 91396. Up to 6570 conditions per place. [2024-06-20 15:50:22,060 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 455 selfloop transitions, 162 changer transitions 0/622 dead transitions. [2024-06-20 15:50:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 622 transitions, 8371 flow [2024-06-20 15:50:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 15:50:22,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-20 15:50:22,062 INFO L175 Difference]: Start difference. First operand has 451 places, 576 transitions, 6801 flow. Second operand 11 states and 219 transitions. [2024-06-20 15:50:22,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 622 transitions, 8371 flow [2024-06-20 15:50:27,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 622 transitions, 8001 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:27,849 INFO L231 Difference]: Finished difference. Result has 456 places, 577 transitions, 6861 flow [2024-06-20 15:50:27,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6861, PETRI_PLACES=456, PETRI_TRANSITIONS=577} [2024-06-20 15:50:27,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-20 15:50:27,849 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 577 transitions, 6861 flow [2024-06-20 15:50:27,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:27,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:27,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:27,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:50:27,850 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash 703679891, now seen corresponding path program 9 times [2024-06-20 15:50:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238214630] [2024-06-20 15:50:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:29,092 INFO 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 15:50:29,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:29,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238214630] [2024-06-20 15:50:29,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238214630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:29,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:29,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:50:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986812592] [2024-06-20 15:50:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:50:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:50:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:50:29,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:29,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 577 transitions, 6861 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:29,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:29,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:29,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:31,829 INFO L124 PetriNetUnfolderBase]: 5149/8479 cut-off events. [2024-06-20 15:50:31,829 INFO L125 PetriNetUnfolderBase]: For 2695558/2695558 co-relation queries the response was YES. [2024-06-20 15:50:31,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95532 conditions, 8479 events. 5149/8479 cut-off events. For 2695558/2695558 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 57615 event pairs, 1016 based on Foata normal form. 12/8483 useless extension candidates. Maximal degree in co-relation 95319. Up to 6968 conditions per place. [2024-06-20 15:50:31,981 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 452 selfloop transitions, 178 changer transitions 0/635 dead transitions. [2024-06-20 15:50:31,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 635 transitions, 9139 flow [2024-06-20 15:50:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-20 15:50:31,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:50:31,988 INFO L175 Difference]: Start difference. First operand has 456 places, 577 transitions, 6861 flow. Second operand 11 states and 220 transitions. [2024-06-20 15:50:31,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 635 transitions, 9139 flow [2024-06-20 15:50:38,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 635 transitions, 8715 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-20 15:50:38,691 INFO L231 Difference]: Finished difference. Result has 460 places, 589 transitions, 7197 flow [2024-06-20 15:50:38,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7197, PETRI_PLACES=460, PETRI_TRANSITIONS=589} [2024-06-20 15:50:38,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-20 15:50:38,691 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 589 transitions, 7197 flow [2024-06-20 15:50:38,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:38,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:38,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:50:38,692 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1816349665, now seen corresponding path program 10 times [2024-06-20 15:50:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24329081] [2024-06-20 15:50:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:38,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:39,923 INFO 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 15:50:39,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24329081] [2024-06-20 15:50:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24329081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:39,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:50:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219265798] [2024-06-20 15:50:39,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:39,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:50:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:50:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:50:40,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:40,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 589 transitions, 7197 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:40,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:40,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:40,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:42,941 INFO L124 PetriNetUnfolderBase]: 5129/8447 cut-off events. [2024-06-20 15:50:42,942 INFO L125 PetriNetUnfolderBase]: For 2629225/2629225 co-relation queries the response was YES. [2024-06-20 15:50:43,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93997 conditions, 8447 events. 5129/8447 cut-off events. For 2629225/2629225 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57409 event pairs, 1007 based on Foata normal form. 12/8451 useless extension candidates. Maximal degree in co-relation 93781. Up to 7072 conditions per place. [2024-06-20 15:50:43,096 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 452 selfloop transitions, 175 changer transitions 0/632 dead transitions. [2024-06-20 15:50:43,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 632 transitions, 8669 flow [2024-06-20 15:50:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 15:50:43,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-20 15:50:43,097 INFO L175 Difference]: Start difference. First operand has 460 places, 589 transitions, 7197 flow. Second operand 11 states and 216 transitions. [2024-06-20 15:50:43,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 632 transitions, 8669 flow [2024-06-20 15:50:48,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 632 transitions, 8429 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:48,923 INFO L231 Difference]: Finished difference. Result has 467 places, 589 transitions, 7313 flow [2024-06-20 15:50:48,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7313, PETRI_PLACES=467, PETRI_TRANSITIONS=589} [2024-06-20 15:50:48,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-20 15:50:48,924 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 589 transitions, 7313 flow [2024-06-20 15:50:48,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:48,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:48,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:48,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:50:48,925 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:48,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1030113685, now seen corresponding path program 11 times [2024-06-20 15:50:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487225562] [2024-06-20 15:50:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:50,150 INFO 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 15:50:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487225562] [2024-06-20 15:50:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487225562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:50:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935342966] [2024-06-20 15:50:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:50:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:50:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:50:50,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 589 transitions, 7313 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:52,881 INFO L124 PetriNetUnfolderBase]: 5293/8771 cut-off events. [2024-06-20 15:50:52,882 INFO L125 PetriNetUnfolderBase]: For 2653067/2653067 co-relation queries the response was YES. [2024-06-20 15:50:53,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95514 conditions, 8771 events. 5293/8771 cut-off events. For 2653067/2653067 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 60368 event pairs, 985 based on Foata normal form. 12/8775 useless extension candidates. Maximal degree in co-relation 95296. Up to 5047 conditions per place. [2024-06-20 15:50:53,043 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 416 selfloop transitions, 218 changer transitions 0/639 dead transitions. [2024-06-20 15:50:53,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 639 transitions, 9279 flow [2024-06-20 15:50:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 15:50:53,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-20 15:50:53,044 INFO L175 Difference]: Start difference. First operand has 467 places, 589 transitions, 7313 flow. Second operand 11 states and 218 transitions. [2024-06-20 15:50:53,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 639 transitions, 9279 flow [2024-06-20 15:50:59,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 639 transitions, 8910 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:50:59,453 INFO L231 Difference]: Finished difference. Result has 470 places, 593 transitions, 7639 flow [2024-06-20 15:50:59,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7639, PETRI_PLACES=470, PETRI_TRANSITIONS=593} [2024-06-20 15:50:59,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-20 15:50:59,454 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 593 transitions, 7639 flow [2024-06-20 15:50:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:59,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:59,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:59,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:50:59,454 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:59,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1177144549, now seen corresponding path program 12 times [2024-06-20 15:50:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455291939] [2024-06-20 15:50:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:00,829 INFO 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 15:51:00,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:00,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455291939] [2024-06-20 15:51:00,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455291939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:00,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:51:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179590630] [2024-06-20 15:51:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:51:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:51:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:51:00,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:00,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 593 transitions, 7639 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:00,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:00,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:00,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:03,767 INFO L124 PetriNetUnfolderBase]: 5403/8971 cut-off events. [2024-06-20 15:51:03,768 INFO L125 PetriNetUnfolderBase]: For 2708011/2708011 co-relation queries the response was YES. [2024-06-20 15:51:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98305 conditions, 8971 events. 5403/8971 cut-off events. For 2708011/2708011 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 62373 event pairs, 1092 based on Foata normal form. 12/8975 useless extension candidates. Maximal degree in co-relation 98085. Up to 7537 conditions per place. [2024-06-20 15:51:03,936 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 482 selfloop transitions, 156 changer transitions 0/643 dead transitions. [2024-06-20 15:51:03,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 643 transitions, 9318 flow [2024-06-20 15:51:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:51:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:51:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-20 15:51:03,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-20 15:51:03,938 INFO L175 Difference]: Start difference. First operand has 470 places, 593 transitions, 7639 flow. Second operand 11 states and 221 transitions. [2024-06-20 15:51:03,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 643 transitions, 9318 flow [2024-06-20 15:51:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 643 transitions, 8859 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:10,852 INFO L231 Difference]: Finished difference. Result has 475 places, 599 transitions, 7701 flow [2024-06-20 15:51:10,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7701, PETRI_PLACES=475, PETRI_TRANSITIONS=599} [2024-06-20 15:51:10,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-20 15:51:10,853 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 599 transitions, 7701 flow [2024-06-20 15:51:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:10,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:10,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:51:10,853 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash 77740207, now seen corresponding path program 13 times [2024-06-20 15:51:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561704050] [2024-06-20 15:51:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:10,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561704050] [2024-06-20 15:51:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561704050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:12,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:12,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:51:12,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715872188] [2024-06-20 15:51:12,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:51:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:51:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:51:12,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:12,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 599 transitions, 7701 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:12,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:12,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:12,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:15,532 INFO L124 PetriNetUnfolderBase]: 5444/9052 cut-off events. [2024-06-20 15:51:15,533 INFO L125 PetriNetUnfolderBase]: For 2738806/2738806 co-relation queries the response was YES. [2024-06-20 15:51:15,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98562 conditions, 9052 events. 5444/9052 cut-off events. For 2738806/2738806 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63186 event pairs, 1105 based on Foata normal form. 12/9056 useless extension candidates. Maximal degree in co-relation 98339. Up to 7516 conditions per place. [2024-06-20 15:51:15,684 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 480 selfloop transitions, 160 changer transitions 0/645 dead transitions. [2024-06-20 15:51:15,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 645 transitions, 9311 flow [2024-06-20 15:51:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:51:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:51:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 15:51:15,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-20 15:51:15,685 INFO L175 Difference]: Start difference. First operand has 475 places, 599 transitions, 7701 flow. Second operand 11 states and 218 transitions. [2024-06-20 15:51:15,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 645 transitions, 9311 flow [2024-06-20 15:51:22,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 645 transitions, 8863 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:22,013 INFO L231 Difference]: Finished difference. Result has 478 places, 600 transitions, 7681 flow [2024-06-20 15:51:22,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7253, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7681, PETRI_PLACES=478, PETRI_TRANSITIONS=600} [2024-06-20 15:51:22,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-20 15:51:22,014 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 600 transitions, 7681 flow [2024-06-20 15:51:22,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:22,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:22,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:22,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:51:22,014 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:22,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2016539661, now seen corresponding path program 14 times [2024-06-20 15:51:22,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:22,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864752005] [2024-06-20 15:51:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:22,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:23,333 INFO 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 15:51:23,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:23,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864752005] [2024-06-20 15:51:23,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864752005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:23,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:23,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:51:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68176455] [2024-06-20 15:51:23,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:23,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:51:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:51:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:51:23,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:23,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 600 transitions, 7681 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:23,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:23,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:23,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:26,678 INFO L124 PetriNetUnfolderBase]: 5485/9131 cut-off events. [2024-06-20 15:51:26,678 INFO L125 PetriNetUnfolderBase]: For 2768681/2768681 co-relation queries the response was YES. [2024-06-20 15:51:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98642 conditions, 9131 events. 5485/9131 cut-off events. For 2768681/2768681 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 63971 event pairs, 1122 based on Foata normal form. 12/9135 useless extension candidates. Maximal degree in co-relation 98420. Up to 7679 conditions per place. [2024-06-20 15:51:26,844 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 482 selfloop transitions, 158 changer transitions 0/645 dead transitions. [2024-06-20 15:51:26,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 645 transitions, 9287 flow [2024-06-20 15:51:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:51:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:51:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-20 15:51:26,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:51:26,845 INFO L175 Difference]: Start difference. First operand has 478 places, 600 transitions, 7681 flow. Second operand 11 states and 220 transitions. [2024-06-20 15:51:26,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 645 transitions, 9287 flow [2024-06-20 15:51:32,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 645 transitions, 8859 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:32,886 INFO L231 Difference]: Finished difference. Result has 481 places, 601 transitions, 7679 flow [2024-06-20 15:51:32,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7253, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7679, PETRI_PLACES=481, PETRI_TRANSITIONS=601} [2024-06-20 15:51:32,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-20 15:51:32,886 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 601 transitions, 7679 flow [2024-06-20 15:51:32,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:32,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:32,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:51:32,887 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:32,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1407121459, now seen corresponding path program 15 times [2024-06-20 15:51:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:32,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342105808] [2024-06-20 15:51:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:32,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:34,122 INFO 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 15:51:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342105808] [2024-06-20 15:51:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342105808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:34,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:51:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538967033] [2024-06-20 15:51:34,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:51:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:51:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:51:34,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:34,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 601 transitions, 7679 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:34,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:34,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:34,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:37,459 INFO L124 PetriNetUnfolderBase]: 5465/9099 cut-off events. [2024-06-20 15:51:37,459 INFO L125 PetriNetUnfolderBase]: For 2691949/2691949 co-relation queries the response was YES. [2024-06-20 15:51:37,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96306 conditions, 9099 events. 5465/9099 cut-off events. For 2691949/2691949 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 63656 event pairs, 1103 based on Foata normal form. 12/9103 useless extension candidates. Maximal degree in co-relation 96085. Up to 7087 conditions per place. [2024-06-20 15:51:37,608 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 472 selfloop transitions, 168 changer transitions 0/645 dead transitions. [2024-06-20 15:51:37,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 645 transitions, 9005 flow [2024-06-20 15:51:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:51:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:51:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 15:51:37,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-20 15:51:37,609 INFO L175 Difference]: Start difference. First operand has 481 places, 601 transitions, 7679 flow. Second operand 11 states and 219 transitions. [2024-06-20 15:51:37,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 645 transitions, 9005 flow [2024-06-20 15:51:44,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 645 transitions, 8527 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:44,132 INFO L231 Difference]: Finished difference. Result has 483 places, 600 transitions, 7361 flow [2024-06-20 15:51:44,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7021, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7361, PETRI_PLACES=483, PETRI_TRANSITIONS=600} [2024-06-20 15:51:44,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 439 predicate places. [2024-06-20 15:51:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 600 transitions, 7361 flow [2024-06-20 15:51:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:44,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:51:44,133 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:44,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1233667768, now seen corresponding path program 7 times [2024-06-20 15:51:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142978368] [2024-06-20 15:51:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:45,446 INFO 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 15:51:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:45,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142978368] [2024-06-20 15:51:45,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142978368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:45,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:45,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:45,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694392527] [2024-06-20 15:51:45,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:45,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:45,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 600 transitions, 7361 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:45,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:48,414 INFO L124 PetriNetUnfolderBase]: 5478/9122 cut-off events. [2024-06-20 15:51:48,414 INFO L125 PetriNetUnfolderBase]: For 2634594/2634608 co-relation queries the response was YES. [2024-06-20 15:51:48,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96388 conditions, 9122 events. 5478/9122 cut-off events. For 2634594/2634608 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 63939 event pairs, 1121 based on Foata normal form. 11/9126 useless extension candidates. Maximal degree in co-relation 96167. Up to 8433 conditions per place. [2024-06-20 15:51:48,564 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 532 selfloop transitions, 91 changer transitions 0/628 dead transitions. [2024-06-20 15:51:48,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 628 transitions, 9706 flow [2024-06-20 15:51:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:51:48,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-20 15:51:48,565 INFO L175 Difference]: Start difference. First operand has 483 places, 600 transitions, 7361 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:51:48,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 628 transitions, 9706 flow [2024-06-20 15:51:55,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 628 transitions, 8922 flow, removed 36 selfloop flow, removed 13 redundant places. [2024-06-20 15:51:55,390 INFO L231 Difference]: Finished difference. Result has 480 places, 612 transitions, 7230 flow [2024-06-20 15:51:55,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6577, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7230, PETRI_PLACES=480, PETRI_TRANSITIONS=612} [2024-06-20 15:51:55,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-20 15:51:55,391 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 612 transitions, 7230 flow [2024-06-20 15:51:55,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:55,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:55,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:55,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:51:55,391 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:55,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1227001528, now seen corresponding path program 8 times [2024-06-20 15:51:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070685995] [2024-06-20 15:51:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:56,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070685995] [2024-06-20 15:51:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070685995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:56,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:56,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525734454] [2024-06-20 15:51:56,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:56,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:56,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:56,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:56,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 612 transitions, 7230 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:56,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:56,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:56,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:59,540 INFO L124 PetriNetUnfolderBase]: 5491/9138 cut-off events. [2024-06-20 15:51:59,540 INFO L125 PetriNetUnfolderBase]: For 2671333/2671347 co-relation queries the response was YES. [2024-06-20 15:51:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95271 conditions, 9138 events. 5491/9138 cut-off events. For 2671333/2671347 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 64026 event pairs, 1123 based on Foata normal form. 11/9142 useless extension candidates. Maximal degree in co-relation 95050. Up to 8448 conditions per place. [2024-06-20 15:51:59,687 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 532 selfloop transitions, 97 changer transitions 0/634 dead transitions. [2024-06-20 15:51:59,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 634 transitions, 9459 flow [2024-06-20 15:51:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:51:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-20 15:51:59,688 INFO L175 Difference]: Start difference. First operand has 480 places, 612 transitions, 7230 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:51:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 634 transitions, 9459 flow [2024-06-20 15:52:08,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 634 transitions, 9180 flow, removed 111 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:08,510 INFO L231 Difference]: Finished difference. Result has 486 places, 619 transitions, 7475 flow [2024-06-20 15:52:08,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6999, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7475, PETRI_PLACES=486, PETRI_TRANSITIONS=619} [2024-06-20 15:52:08,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-20 15:52:08,510 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 619 transitions, 7475 flow [2024-06-20 15:52:08,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:08,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:08,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:52:08,511 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:08,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 769888424, now seen corresponding path program 10 times [2024-06-20 15:52:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:08,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196941318] [2024-06-20 15:52:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:09,562 INFO 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 15:52:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196941318] [2024-06-20 15:52:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196941318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:09,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:09,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817796857] [2024-06-20 15:52:09,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:09,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:09,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 619 transitions, 7475 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:09,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:09,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:09,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:12,520 INFO L124 PetriNetUnfolderBase]: 5496/9148 cut-off events. [2024-06-20 15:52:12,521 INFO L125 PetriNetUnfolderBase]: For 2696549/2696557 co-relation queries the response was YES. [2024-06-20 15:52:12,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95270 conditions, 9148 events. 5496/9148 cut-off events. For 2696549/2696557 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 64078 event pairs, 1147 based on Foata normal form. 7/9142 useless extension candidates. Maximal degree in co-relation 95046. Up to 8359 conditions per place. [2024-06-20 15:52:12,680 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 521 selfloop transitions, 113 changer transitions 0/639 dead transitions. [2024-06-20 15:52:12,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 639 transitions, 9368 flow [2024-06-20 15:52:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:52:12,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-20 15:52:12,681 INFO L175 Difference]: Start difference. First operand has 486 places, 619 transitions, 7475 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:52:12,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 639 transitions, 9368 flow [2024-06-20 15:52:19,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 639 transitions, 9141 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:19,718 INFO L231 Difference]: Finished difference. Result has 491 places, 627 transitions, 7769 flow [2024-06-20 15:52:19,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7248, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7769, PETRI_PLACES=491, PETRI_TRANSITIONS=627} [2024-06-20 15:52:19,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-20 15:52:19,718 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 627 transitions, 7769 flow [2024-06-20 15:52:19,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:19,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:19,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:19,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:52:19,719 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:19,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1998065058, now seen corresponding path program 9 times [2024-06-20 15:52:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081576992] [2024-06-20 15:52:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:20,919 INFO 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 15:52:20,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081576992] [2024-06-20 15:52:20,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081576992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:20,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:20,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:20,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659680670] [2024-06-20 15:52:20,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:20,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:20,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:20,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:20,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 627 transitions, 7769 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:20,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:20,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:20,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:23,779 INFO L124 PetriNetUnfolderBase]: 5493/9139 cut-off events. [2024-06-20 15:52:23,779 INFO L125 PetriNetUnfolderBase]: For 2719367/2719381 co-relation queries the response was YES. [2024-06-20 15:52:23,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95551 conditions, 9139 events. 5493/9139 cut-off events. For 2719367/2719381 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 63964 event pairs, 1120 based on Foata normal form. 11/9143 useless extension candidates. Maximal degree in co-relation 95325. Up to 8495 conditions per place. [2024-06-20 15:52:23,939 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 575 selfloop transitions, 63 changer transitions 0/643 dead transitions. [2024-06-20 15:52:23,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 643 transitions, 9465 flow [2024-06-20 15:52:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:52:23,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-20 15:52:23,940 INFO L175 Difference]: Start difference. First operand has 491 places, 627 transitions, 7769 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:52:23,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 643 transitions, 9465 flow [2024-06-20 15:52:31,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 643 transitions, 9027 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:31,537 INFO L231 Difference]: Finished difference. Result has 495 places, 629 transitions, 7528 flow [2024-06-20 15:52:31,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7528, PETRI_PLACES=495, PETRI_TRANSITIONS=629} [2024-06-20 15:52:31,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-20 15:52:31,538 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 629 transitions, 7528 flow [2024-06-20 15:52:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:31,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:31,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:52:31,538 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:31,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash 770038371, now seen corresponding path program 10 times [2024-06-20 15:52:31,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:31,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248904190] [2024-06-20 15:52:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:31,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:32,579 INFO 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 15:52:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248904190] [2024-06-20 15:52:32,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248904190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:32,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:32,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481793562] [2024-06-20 15:52:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:32,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:32,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:32,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 629 transitions, 7528 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:32,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:32,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:32,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:35,479 INFO L124 PetriNetUnfolderBase]: 5511/9172 cut-off events. [2024-06-20 15:52:35,479 INFO L125 PetriNetUnfolderBase]: For 2773316/2773330 co-relation queries the response was YES. [2024-06-20 15:52:35,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95805 conditions, 9172 events. 5511/9172 cut-off events. For 2773316/2773330 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 64278 event pairs, 1134 based on Foata normal form. 12/9175 useless extension candidates. Maximal degree in co-relation 95577. Up to 8396 conditions per place. [2024-06-20 15:52:35,648 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 554 selfloop transitions, 93 changer transitions 0/652 dead transitions. [2024-06-20 15:52:35,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 652 transitions, 9516 flow [2024-06-20 15:52:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:52:35,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-20 15:52:35,649 INFO L175 Difference]: Start difference. First operand has 495 places, 629 transitions, 7528 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:52:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 652 transitions, 9516 flow