./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.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/mix015.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix015.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:02:41,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:02:41,718 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:02:41,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:02:41,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:02:41,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:02:41,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:02:41,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:02:41,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:02:41,746 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:02:41,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:02:41,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:02:41,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:02:41,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:02:41,749 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:02:41,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:02:41,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:02:41,752 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:02:41,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:02:41,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:02:41,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:02:41,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:02:41,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:02:41,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:02:41,754 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:02:41,754 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:02:41,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:02:41,754 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:02:41,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:02:41,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:02:41,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:02:41,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:02:41,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:02:41,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:02:41,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:02:41,756 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:02:41,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:02:41,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:02:41,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:02:41,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:02:41,757 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:02:41,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:02:41,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:02:41,758 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:02:41,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:02:41,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:02:41,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:02:41,995 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:02:41,995 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:02:41,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix015.opt.yml/witness.yml [2024-06-14 12:02:42,152 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:02:42,153 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:02:42,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-06-14 12:02:43,171 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:02:43,378 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:02:43,378 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-06-14 12:02:43,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9de52bf3f/f54b76f4da054a26a6efad6d7e7e4e65/FLAGdac12b5c2 [2024-06-14 12:02:43,400 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9de52bf3f/f54b76f4da054a26a6efad6d7e7e4e65 [2024-06-14 12:02:43,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:02:43,402 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:02:43,402 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:02:43,402 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:02:43,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:02:43,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:02:42" (1/2) ... [2024-06-14 12:02:43,407 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a42edbc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:02:43, skipping insertion in model container [2024-06-14 12:02:43,407 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:02:42" (1/2) ... [2024-06-14 12:02:43,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d88e4f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:02:43, skipping insertion in model container [2024-06-14 12:02:43,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:02:43" (2/2) ... [2024-06-14 12:02:43,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a42edbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:43, skipping insertion in model container [2024-06-14 12:02:43,409 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:02:43" (2/2) ... [2024-06-14 12:02:43,409 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:02:43,485 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:02:43,486 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 12:02:43,487 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 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))) [2024-06-14 12:02:43,487 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 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))) [2024-06-14 12:02:43,487 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:02:43,487 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 12:02:43,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:02:43,841 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:02:43,848 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:02:43,966 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:02:44,000 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:02:44,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44 WrapperNode [2024-06-14 12:02:44,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:02:44,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:02:44,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:02:44,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:02:44,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,064 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-14 12:02:44,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:02:44,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:02:44,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:02:44,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:02:44,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,114 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,132 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:02:44,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,146 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:02:44,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:02:44,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:02:44,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:02:44,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (1/1) ... [2024-06-14 12:02:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:02:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:02:44,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:02:44,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:02:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:02:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:02:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:02:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:02:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:02:44,234 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:02:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:02:44,234 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:02:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:02:44,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:02:44,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:02:44,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:02:44,237 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:02:44,367 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:02:44,370 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:02:44,712 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:02:44,713 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:02:44,852 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:02:44,852 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:02:44,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:02:44 BoogieIcfgContainer [2024-06-14 12:02:44,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:02:44,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:02:44,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:02:44,859 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:02:44,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:02:42" (1/4) ... [2024-06-14 12:02:44,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5776a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:02:44, skipping insertion in model container [2024-06-14 12:02:44,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:02:43" (2/4) ... [2024-06-14 12:02:44,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5776a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:02:44, skipping insertion in model container [2024-06-14 12:02:44,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:02:44" (3/4) ... [2024-06-14 12:02:44,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5776a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:02:44, skipping insertion in model container [2024-06-14 12:02:44,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:02:44" (4/4) ... [2024-06-14 12:02:44,869 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.opt.i [2024-06-14 12:02:44,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:02:44,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:02:44,884 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:02:44,920 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:02:44,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 12:02:44,964 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 12:02:44,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:02:44,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 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. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:02:44,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 12:02:44,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 12:02:44,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:02:44,979 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;@617dbd80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:02:44,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:02:44,982 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:02:44,982 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:02:44,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:02:44,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:44,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:02:44,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:44,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -408876045, now seen corresponding path program 1 times [2024-06-14 12:02:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:44,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078824746] [2024-06-14 12:02:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:44,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:46,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078824746] [2024-06-14 12:02:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078824746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:46,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:46,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:02:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253162372] [2024-06-14 12:02:46,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:46,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:02:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:02:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:02:46,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-14 12:02:46,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:46,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:46,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-14 12:02:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:46,505 INFO L124 PetriNetUnfolderBase]: 1116/1773 cut-off events. [2024-06-14 12:02:46,505 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 12:02:46,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1773 events. 1116/1773 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9247 event pairs, 765 based on Foata normal form. 1/1693 useless extension candidates. Maximal degree in co-relation 3511. Up to 1676 conditions per place. [2024-06-14 12:02:46,521 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 12:02:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 179 flow [2024-06-14 12:02:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:02:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:02:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-14 12:02:46,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-06-14 12:02:46,532 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 82 transitions. [2024-06-14 12:02:46,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 179 flow [2024-06-14 12:02:46,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:46,537 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 12:02:46,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 12:02:46,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 12:02:46,543 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 12:02:46,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:46,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:46,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:46,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:02:46,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:46,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2087833902, now seen corresponding path program 1 times [2024-06-14 12:02:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:46,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281486621] [2024-06-14 12:02:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:47,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:47,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281486621] [2024-06-14 12:02:47,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281486621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:47,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:47,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:02:47,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517933115] [2024-06-14 12:02:47,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:02:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:02:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:02:47,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 12:02:47,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:47,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:47,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 12:02:47,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:47,674 INFO L124 PetriNetUnfolderBase]: 1280/1969 cut-off events. [2024-06-14 12:02:47,674 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2024-06-14 12:02:47,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4492 conditions, 1969 events. 1280/1969 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9959 event pairs, 750 based on Foata normal form. 3/1949 useless extension candidates. Maximal degree in co-relation 4477. Up to 1897 conditions per place. [2024-06-14 12:02:47,685 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 12:02:47,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-14 12:02:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:02:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:02:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 12:02:47,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 12:02:47,689 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-14 12:02:47,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-14 12:02:47,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:02:47,693 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 12:02:47,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 12:02:47,694 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 12:02:47,694 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 12:02:47,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:47,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:47,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:47,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:02:47,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:47,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash -298340792, now seen corresponding path program 1 times [2024-06-14 12:02:47,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:47,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559582988] [2024-06-14 12:02:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:48,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559582988] [2024-06-14 12:02:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559582988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:48,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:48,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:02:48,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692289420] [2024-06-14 12:02:48,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:48,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:02:48,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:48,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:02:48,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:02:48,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:02:48,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:48,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:48,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:02:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:49,009 INFO L124 PetriNetUnfolderBase]: 1558/2372 cut-off events. [2024-06-14 12:02:49,010 INFO L125 PetriNetUnfolderBase]: For 1303/1303 co-relation queries the response was YES. [2024-06-14 12:02:49,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 2372 events. 1558/2372 cut-off events. For 1303/1303 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11847 event pairs, 839 based on Foata normal form. 3/2362 useless extension candidates. Maximal degree in co-relation 5973. Up to 2286 conditions per place. [2024-06-14 12:02:49,021 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-14 12:02:49,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 328 flow [2024-06-14 12:02:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:02:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:02:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 12:02:49,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-14 12:02:49,024 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 122 transitions. [2024-06-14 12:02:49,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 328 flow [2024-06-14 12:02:49,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:02:49,026 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-14 12:02:49,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 12:02:49,027 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-14 12:02:49,027 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-14 12:02:49,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:49,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:49,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:02:49,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:49,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash -658629199, now seen corresponding path program 1 times [2024-06-14 12:02:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:49,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749291426] [2024-06-14 12:02:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:49,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749291426] [2024-06-14 12:02:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749291426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:02:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187231979] [2024-06-14 12:02:49,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:49,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:02:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:02:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:02:49,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:02:49,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 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) [2024-06-14 12:02:49,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:49,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:02:49,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:50,292 INFO L124 PetriNetUnfolderBase]: 1552/2376 cut-off events. [2024-06-14 12:02:50,292 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-14 12:02:50,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6564 conditions, 2376 events. 1552/2376 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11950 event pairs, 697 based on Foata normal form. 3/2373 useless extension candidates. Maximal degree in co-relation 6546. Up to 2262 conditions per place. [2024-06-14 12:02:50,303 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-14 12:02:50,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 406 flow [2024-06-14 12:02:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:02:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:02:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 12:02:50,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 12:02:50,306 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 144 transitions. [2024-06-14 12:02:50,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 406 flow [2024-06-14 12:02:50,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:50,310 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-14 12:02:50,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-14 12:02:50,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-14 12:02:50,312 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-14 12:02:50,312 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) [2024-06-14 12:02:50,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:50,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:02:50,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:50,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash 848621293, now seen corresponding path program 1 times [2024-06-14 12:02:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979119175] [2024-06-14 12:02:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979119175] [2024-06-14 12:02:50,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979119175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:50,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:50,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:02:50,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078316484] [2024-06-14 12:02:50,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:50,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:02:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:02:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:02:51,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:02:51,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:51,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:51,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:02:51,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:51,473 INFO L124 PetriNetUnfolderBase]: 1495/2423 cut-off events. [2024-06-14 12:02:51,473 INFO L125 PetriNetUnfolderBase]: For 3673/3673 co-relation queries the response was YES. [2024-06-14 12:02:51,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7040 conditions, 2423 events. 1495/2423 cut-off events. For 3673/3673 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12825 event pairs, 734 based on Foata normal form. 4/2418 useless extension candidates. Maximal degree in co-relation 7021. Up to 2212 conditions per place. [2024-06-14 12:02:51,485 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 46 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-14 12:02:51,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 368 flow [2024-06-14 12:02:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:02:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:02:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-14 12:02:51,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-14 12:02:51,487 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 108 transitions. [2024-06-14 12:02:51,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 368 flow [2024-06-14 12:02:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 334 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:51,489 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-14 12:02:51,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-14 12:02:51,490 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-14 12:02:51,490 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-14 12:02:51,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:51,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:51,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:51,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:02:51,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:51,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1629841760, now seen corresponding path program 1 times [2024-06-14 12:02:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:51,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11101759] [2024-06-14 12:02:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:52,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:52,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11101759] [2024-06-14 12:02:52,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11101759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:52,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:52,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:02:52,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172236108] [2024-06-14 12:02:52,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:52,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:02:52,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:02:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:02:52,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:52,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:52,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:52,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:52,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:52,898 INFO L124 PetriNetUnfolderBase]: 1746/2689 cut-off events. [2024-06-14 12:02:52,898 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2024-06-14 12:02:52,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8556 conditions, 2689 events. 1746/2689 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13492 event pairs, 828 based on Foata normal form. 4/2689 useless extension candidates. Maximal degree in co-relation 8535. Up to 2516 conditions per place. [2024-06-14 12:02:52,914 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 56 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-14 12:02:52,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 486 flow [2024-06-14 12:02:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:02:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:02:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 12:02:52,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-06-14 12:02:52,916 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 131 transitions. [2024-06-14 12:02:52,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 486 flow [2024-06-14 12:02:52,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 464 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:52,919 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 290 flow [2024-06-14 12:02:52,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 12:02:52,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-14 12:02:52,920 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 290 flow [2024-06-14 12:02:52,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:52,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:52,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:02:52,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:52,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 540390830, now seen corresponding path program 2 times [2024-06-14 12:02:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:52,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522094530] [2024-06-14 12:02:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:52,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:53,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:53,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522094530] [2024-06-14 12:02:53,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522094530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:53,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:02:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289883419] [2024-06-14 12:02:53,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:53,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:02:53,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:02:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:02:53,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:53,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:53,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:53,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:53,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:54,233 INFO L124 PetriNetUnfolderBase]: 1736/2677 cut-off events. [2024-06-14 12:02:54,233 INFO L125 PetriNetUnfolderBase]: For 8114/8126 co-relation queries the response was YES. [2024-06-14 12:02:54,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9146 conditions, 2677 events. 1736/2677 cut-off events. For 8114/8126 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13466 event pairs, 827 based on Foata normal form. 14/2688 useless extension candidates. Maximal degree in co-relation 9124. Up to 2508 conditions per place. [2024-06-14 12:02:54,247 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-14 12:02:54,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 464 flow [2024-06-14 12:02:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:02:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:02:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-14 12:02:54,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-14 12:02:54,248 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 290 flow. Second operand 6 states and 125 transitions. [2024-06-14 12:02:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 464 flow [2024-06-14 12:02:54,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 432 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 12:02:54,253 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 298 flow [2024-06-14 12:02:54,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 12:02:54,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2024-06-14 12:02:54,254 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 298 flow [2024-06-14 12:02:54,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:54,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:54,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:02:54,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:54,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1315049636, now seen corresponding path program 1 times [2024-06-14 12:02:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357305847] [2024-06-14 12:02:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:55,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:55,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357305847] [2024-06-14 12:02:55,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357305847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:55,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:55,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971361147] [2024-06-14 12:02:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:55,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:55,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:55,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:55,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:56,008 INFO L124 PetriNetUnfolderBase]: 1823/2760 cut-off events. [2024-06-14 12:02:56,008 INFO L125 PetriNetUnfolderBase]: For 9787/9787 co-relation queries the response was YES. [2024-06-14 12:02:56,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9682 conditions, 2760 events. 1823/2760 cut-off events. For 9787/9787 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13539 event pairs, 592 based on Foata normal form. 6/2764 useless extension candidates. Maximal degree in co-relation 9658. Up to 2610 conditions per place. [2024-06-14 12:02:56,025 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-06-14 12:02:56,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 614 flow [2024-06-14 12:02:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 12:02:56,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028409090909091 [2024-06-14 12:02:56,028 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 298 flow. Second operand 8 states and 177 transitions. [2024-06-14 12:02:56,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 614 flow [2024-06-14 12:02:56,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 574 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:56,035 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 335 flow [2024-06-14 12:02:56,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-14 12:02:56,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-14 12:02:56,036 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 335 flow [2024-06-14 12:02:56,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:56,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:56,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:56,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:02:56,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:56,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 864632944, now seen corresponding path program 1 times [2024-06-14 12:02:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:56,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955634110] [2024-06-14 12:02:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:56,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:56,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:56,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955634110] [2024-06-14 12:02:56,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955634110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:56,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:56,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286525590] [2024-06-14 12:02:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:56,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:56,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:56,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 335 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:56,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:56,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:56,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:57,609 INFO L124 PetriNetUnfolderBase]: 1845/2796 cut-off events. [2024-06-14 12:02:57,610 INFO L125 PetriNetUnfolderBase]: For 12657/12657 co-relation queries the response was YES. [2024-06-14 12:02:57,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10394 conditions, 2796 events. 1845/2796 cut-off events. For 12657/12657 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13746 event pairs, 635 based on Foata normal form. 4/2796 useless extension candidates. Maximal degree in co-relation 10369. Up to 2586 conditions per place. [2024-06-14 12:02:57,627 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-14 12:02:57,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 679 flow [2024-06-14 12:02:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 12:02:57,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 12:02:57,630 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 335 flow. Second operand 7 states and 147 transitions. [2024-06-14 12:02:57,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 679 flow [2024-06-14 12:02:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 628 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:57,636 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 398 flow [2024-06-14 12:02:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-14 12:02:57,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-14 12:02:57,637 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 398 flow [2024-06-14 12:02:57,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:57,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:02:57,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:57,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash 864639454, now seen corresponding path program 2 times [2024-06-14 12:02:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793235120] [2024-06-14 12:02:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:57,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:58,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:58,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793235120] [2024-06-14 12:02:58,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793235120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:58,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:58,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:58,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632492091] [2024-06-14 12:02:58,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:58,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:58,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:58,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:58,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:58,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:58,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:58,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:59,106 INFO L124 PetriNetUnfolderBase]: 1867/2828 cut-off events. [2024-06-14 12:02:59,106 INFO L125 PetriNetUnfolderBase]: For 15919/15919 co-relation queries the response was YES. [2024-06-14 12:02:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11133 conditions, 2828 events. 1867/2828 cut-off events. For 15919/15919 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13938 event pairs, 635 based on Foata normal form. 4/2828 useless extension candidates. Maximal degree in co-relation 11106. Up to 2605 conditions per place. [2024-06-14 12:02:59,123 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-14 12:02:59,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 97 transitions, 718 flow [2024-06-14 12:02:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:02:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:02:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:02:59,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-14 12:02:59,125 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 398 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:02:59,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 97 transitions, 718 flow [2024-06-14 12:02:59,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 672 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:59,135 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 444 flow [2024-06-14 12:02:59,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-14 12:02:59,137 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-14 12:02:59,137 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 444 flow [2024-06-14 12:02:59,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:59,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:59,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:59,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:02:59,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:59,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash -427752004, now seen corresponding path program 3 times [2024-06-14 12:02:59,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008439697] [2024-06-14 12:02:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:59,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008439697] [2024-06-14 12:02:59,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008439697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:59,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:59,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:02:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767765290] [2024-06-14 12:02:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:02:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:02:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:02:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:59,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:59,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:59,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:00,619 INFO L124 PetriNetUnfolderBase]: 1857/2817 cut-off events. [2024-06-14 12:03:00,620 INFO L125 PetriNetUnfolderBase]: For 18464/18476 co-relation queries the response was YES. [2024-06-14 12:03:00,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11369 conditions, 2817 events. 1857/2817 cut-off events. For 18464/18476 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13806 event pairs, 646 based on Foata normal form. 11/2825 useless extension candidates. Maximal degree in co-relation 11340. Up to 2597 conditions per place. [2024-06-14 12:03:00,634 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 60 selfloop transitions, 26 changer transitions 0/91 dead transitions. [2024-06-14 12:03:00,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 670 flow [2024-06-14 12:03:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:03:00,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 12:03:00,636 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 444 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:03:00,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 670 flow [2024-06-14 12:03:00,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 606 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:00,646 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 440 flow [2024-06-14 12:03:00,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-06-14 12:03:00,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-14 12:03:00,647 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 440 flow [2024-06-14 12:03:00,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:00,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:00,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:03:00,648 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:00,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1101122644, now seen corresponding path program 1 times [2024-06-14 12:03:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:00,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766052084] [2024-06-14 12:03:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:01,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766052084] [2024-06-14 12:03:01,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766052084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:01,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792861401] [2024-06-14 12:03:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:01,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:01,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:01,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:01,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:01,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:03:01,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:01,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:01,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:03:01,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:02,399 INFO L124 PetriNetUnfolderBase]: 1532/2459 cut-off events. [2024-06-14 12:03:02,400 INFO L125 PetriNetUnfolderBase]: For 17615/17615 co-relation queries the response was YES. [2024-06-14 12:03:02,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9869 conditions, 2459 events. 1532/2459 cut-off events. For 17615/17615 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12830 event pairs, 547 based on Foata normal form. 4/2440 useless extension candidates. Maximal degree in co-relation 9839. Up to 2219 conditions per place. [2024-06-14 12:03:02,414 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 70 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-06-14 12:03:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 699 flow [2024-06-14 12:03:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:03:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 12:03:02,415 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 440 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:03:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 699 flow [2024-06-14 12:03:02,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 618 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:02,426 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 445 flow [2024-06-14 12:03:02,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-06-14 12:03:02,427 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-14 12:03:02,427 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 445 flow [2024-06-14 12:03:02,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:02,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:02,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:02,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:03:02,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:02,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash -33405023, now seen corresponding path program 1 times [2024-06-14 12:03:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416992203] [2024-06-14 12:03:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416992203] [2024-06-14 12:03:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416992203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:03,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:03,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:03:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78941310] [2024-06-14 12:03:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:03:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:03:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:03:03,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 12:03:03,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 445 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-14 12:03:03,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:03,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 12:03:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:03,555 INFO L124 PetriNetUnfolderBase]: 1428/2353 cut-off events. [2024-06-14 12:03:03,555 INFO L125 PetriNetUnfolderBase]: For 19904/19904 co-relation queries the response was YES. [2024-06-14 12:03:03,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9936 conditions, 2353 events. 1428/2353 cut-off events. For 19904/19904 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12668 event pairs, 556 based on Foata normal form. 1/2352 useless extension candidates. Maximal degree in co-relation 9904. Up to 2130 conditions per place. [2024-06-14 12:03:03,569 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 64 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-06-14 12:03:03,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 631 flow [2024-06-14 12:03:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:03:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:03:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-14 12:03:03,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 12:03:03,570 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 445 flow. Second operand 5 states and 106 transitions. [2024-06-14 12:03:03,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 631 flow [2024-06-14 12:03:03,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 590 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:03,583 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 454 flow [2024-06-14 12:03:03,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-14 12:03:03,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-14 12:03:03,584 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 454 flow [2024-06-14 12:03:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-14 12:03:03,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:03,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:03,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:03:03,585 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:03,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:03,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1379464191, now seen corresponding path program 1 times [2024-06-14 12:03:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:03,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249435363] [2024-06-14 12:03:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:04,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:04,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249435363] [2024-06-14 12:03:04,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249435363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:04,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:04,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:04,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742993781] [2024-06-14 12:03:04,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:04,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:04,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:04,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:04,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:04,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:04,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:05,322 INFO L124 PetriNetUnfolderBase]: 1868/2826 cut-off events. [2024-06-14 12:03:05,322 INFO L125 PetriNetUnfolderBase]: For 27080/27082 co-relation queries the response was YES. [2024-06-14 12:03:05,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12562 conditions, 2826 events. 1868/2826 cut-off events. For 27080/27082 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13809 event pairs, 588 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 12529. Up to 2531 conditions per place. [2024-06-14 12:03:05,336 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 79 selfloop transitions, 37 changer transitions 0/121 dead transitions. [2024-06-14 12:03:05,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 902 flow [2024-06-14 12:03:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 12:03:05,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-14 12:03:05,337 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 454 flow. Second operand 8 states and 169 transitions. [2024-06-14 12:03:05,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 902 flow [2024-06-14 12:03:05,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 874 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:05,354 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 578 flow [2024-06-14 12:03:05,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-14 12:03:05,354 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-14 12:03:05,355 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 578 flow [2024-06-14 12:03:05,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:05,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:05,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:05,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:03:05,355 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:05,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1379613921, now seen corresponding path program 2 times [2024-06-14 12:03:05,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:05,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097237781] [2024-06-14 12:03:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:06,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:06,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097237781] [2024-06-14 12:03:06,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097237781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:06,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:06,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:06,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328496069] [2024-06-14 12:03:06,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:06,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:06,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:06,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:06,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:06,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 578 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:06,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:06,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:06,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:07,160 INFO L124 PetriNetUnfolderBase]: 1890/2858 cut-off events. [2024-06-14 12:03:07,161 INFO L125 PetriNetUnfolderBase]: For 31658/31660 co-relation queries the response was YES. [2024-06-14 12:03:07,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13459 conditions, 2858 events. 1890/2858 cut-off events. For 31658/31660 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14013 event pairs, 588 based on Foata normal form. 4/2859 useless extension candidates. Maximal degree in co-relation 13425. Up to 2550 conditions per place. [2024-06-14 12:03:07,175 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-14 12:03:07,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 996 flow [2024-06-14 12:03:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:03:07,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-14 12:03:07,177 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 578 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:03:07,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 996 flow [2024-06-14 12:03:07,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 917 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:07,197 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 621 flow [2024-06-14 12:03:07,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-14 12:03:07,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 12:03:07,197 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 621 flow [2024-06-14 12:03:07,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:07,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:07,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:07,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:03:07,198 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:07,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1034020779, now seen corresponding path program 3 times [2024-06-14 12:03:07,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:07,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893439569] [2024-06-14 12:03:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:07,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:08,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:08,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893439569] [2024-06-14 12:03:08,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893439569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:08,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:08,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:08,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003592990] [2024-06-14 12:03:08,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:08,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:08,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:08,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:08,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:08,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:08,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:08,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:08,893 INFO L124 PetriNetUnfolderBase]: 1912/2890 cut-off events. [2024-06-14 12:03:08,893 INFO L125 PetriNetUnfolderBase]: For 35264/35266 co-relation queries the response was YES. [2024-06-14 12:03:08,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13829 conditions, 2890 events. 1912/2890 cut-off events. For 35264/35266 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14130 event pairs, 593 based on Foata normal form. 4/2891 useless extension candidates. Maximal degree in co-relation 13793. Up to 2569 conditions per place. [2024-06-14 12:03:08,909 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 76 selfloop transitions, 40 changer transitions 0/121 dead transitions. [2024-06-14 12:03:08,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1033 flow [2024-06-14 12:03:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:03:08,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-14 12:03:08,910 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 621 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:03:08,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1033 flow [2024-06-14 12:03:08,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 955 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:08,934 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 667 flow [2024-06-14 12:03:08,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-06-14 12:03:08,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 12:03:08,935 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 667 flow [2024-06-14 12:03:08,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:08,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:08,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:08,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:03:08,935 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)] === [2024-06-14 12:03:08,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash -375408755, now seen corresponding path program 4 times [2024-06-14 12:03:08,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:08,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843804751] [2024-06-14 12:03:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:09,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:09,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843804751] [2024-06-14 12:03:09,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843804751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:09,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:09,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:09,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403382111] [2024-06-14 12:03:09,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:09,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:09,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:09,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:09,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:09,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:09,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 667 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:09,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:09,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:09,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:10,617 INFO L124 PetriNetUnfolderBase]: 1902/2885 cut-off events. [2024-06-14 12:03:10,618 INFO L125 PetriNetUnfolderBase]: For 38897/38905 co-relation queries the response was YES. [2024-06-14 12:03:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13961 conditions, 2885 events. 1902/2885 cut-off events. For 38897/38905 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14132 event pairs, 616 based on Foata normal form. 7/2889 useless extension candidates. Maximal degree in co-relation 13924. Up to 2561 conditions per place. [2024-06-14 12:03:10,632 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 71 selfloop transitions, 40 changer transitions 0/116 dead transitions. [2024-06-14 12:03:10,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 116 transitions, 963 flow [2024-06-14 12:03:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:03:10,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 12:03:10,634 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 667 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:03:10,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 116 transitions, 963 flow [2024-06-14 12:03:10,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 116 transitions, 872 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:10,661 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 664 flow [2024-06-14 12:03:10,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=664, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2024-06-14 12:03:10,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-14 12:03:10,662 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 664 flow [2024-06-14 12:03:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:10,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:10,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:10,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:03:10,662 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:10,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1035554129, now seen corresponding path program 1 times [2024-06-14 12:03:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114681122] [2024-06-14 12:03:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:11,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:11,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114681122] [2024-06-14 12:03:11,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114681122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:11,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:11,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960284260] [2024-06-14 12:03:11,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:11,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:11,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 12:03:11,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 664 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 12:03:11,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:11,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 12:03:11,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:12,064 INFO L124 PetriNetUnfolderBase]: 1453/2404 cut-off events. [2024-06-14 12:03:12,064 INFO L125 PetriNetUnfolderBase]: For 34899/34899 co-relation queries the response was YES. [2024-06-14 12:03:12,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11684 conditions, 2404 events. 1453/2404 cut-off events. For 34899/34899 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12962 event pairs, 532 based on Foata normal form. 2/2400 useless extension candidates. Maximal degree in co-relation 11646. Up to 2133 conditions per place. [2024-06-14 12:03:12,078 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 74 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2024-06-14 12:03:12,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 884 flow [2024-06-14 12:03:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 12:03:12,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 12:03:12,079 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 664 flow. Second operand 6 states and 124 transitions. [2024-06-14 12:03:12,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 884 flow [2024-06-14 12:03:12,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 749 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 12:03:12,096 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 589 flow [2024-06-14 12:03:12,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=589, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-14 12:03:12,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-14 12:03:12,097 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 589 flow [2024-06-14 12:03:12,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 12:03:12,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:12,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:12,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:03:12,098 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:12,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:12,098 INFO L85 PathProgramCache]: Analyzing trace with hash -186286177, now seen corresponding path program 1 times [2024-06-14 12:03:12,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:12,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699009729] [2024-06-14 12:03:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:12,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:13,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699009729] [2024-06-14 12:03:13,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699009729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:13,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:13,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357150185] [2024-06-14 12:03:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:13,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:13,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:13,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 589 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:13,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:13,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:13,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:13,998 INFO L124 PetriNetUnfolderBase]: 1915/2909 cut-off events. [2024-06-14 12:03:13,998 INFO L125 PetriNetUnfolderBase]: For 45296/45296 co-relation queries the response was YES. [2024-06-14 12:03:14,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14489 conditions, 2909 events. 1915/2909 cut-off events. For 45296/45296 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14329 event pairs, 627 based on Foata normal form. 4/2911 useless extension candidates. Maximal degree in co-relation 14451. Up to 2758 conditions per place. [2024-06-14 12:03:14,015 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 110 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-06-14 12:03:14,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 135 transitions, 989 flow [2024-06-14 12:03:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:03:14,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 12:03:14,018 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 589 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:03:14,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 135 transitions, 989 flow [2024-06-14 12:03:14,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 951 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:14,041 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 641 flow [2024-06-14 12:03:14,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=641, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2024-06-14 12:03:14,042 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-14 12:03:14,042 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 641 flow [2024-06-14 12:03:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:14,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:14,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:14,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:03:14,042 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:14,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:14,043 INFO L85 PathProgramCache]: Analyzing trace with hash -186281527, now seen corresponding path program 2 times [2024-06-14 12:03:14,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:14,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120502989] [2024-06-14 12:03:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:14,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:14,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:14,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120502989] [2024-06-14 12:03:14,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120502989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:14,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:14,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:14,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809861755] [2024-06-14 12:03:14,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:15,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:15,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 641 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:15,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:15,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:15,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:15,912 INFO L124 PetriNetUnfolderBase]: 1937/2944 cut-off events. [2024-06-14 12:03:15,912 INFO L125 PetriNetUnfolderBase]: For 50359/50361 co-relation queries the response was YES. [2024-06-14 12:03:15,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15236 conditions, 2944 events. 1937/2944 cut-off events. For 50359/50361 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14554 event pairs, 543 based on Foata normal form. 4/2945 useless extension candidates. Maximal degree in co-relation 15197. Up to 2508 conditions per place. [2024-06-14 12:03:15,932 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 88 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-06-14 12:03:15,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 144 transitions, 1191 flow [2024-06-14 12:03:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 12:03:15,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 12:03:15,934 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 641 flow. Second operand 9 states and 189 transitions. [2024-06-14 12:03:15,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 144 transitions, 1191 flow [2024-06-14 12:03:15,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 144 transitions, 1125 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:15,969 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 775 flow [2024-06-14 12:03:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=775, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-14 12:03:15,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 12:03:15,970 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 775 flow [2024-06-14 12:03:15,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:15,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:15,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:03:15,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:15,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -557487113, now seen corresponding path program 3 times [2024-06-14 12:03:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:15,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200616127] [2024-06-14 12:03:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:15,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200616127] [2024-06-14 12:03:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200616127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:17,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:17,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042722602] [2024-06-14 12:03:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:17,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:17,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:17,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:17,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:17,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:17,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:17,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:17,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:18,116 INFO L124 PetriNetUnfolderBase]: 1959/2986 cut-off events. [2024-06-14 12:03:18,117 INFO L125 PetriNetUnfolderBase]: For 56992/56994 co-relation queries the response was YES. [2024-06-14 12:03:18,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16099 conditions, 2986 events. 1959/2986 cut-off events. For 56992/56994 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14817 event pairs, 548 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 16059. Up to 2527 conditions per place. [2024-06-14 12:03:18,140 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 87 selfloop transitions, 52 changer transitions 0/144 dead transitions. [2024-06-14 12:03:18,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 144 transitions, 1285 flow [2024-06-14 12:03:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 12:03:18,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:03:18,142 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 775 flow. Second operand 9 states and 187 transitions. [2024-06-14 12:03:18,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 144 transitions, 1285 flow [2024-06-14 12:03:18,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1190 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:18,185 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 840 flow [2024-06-14 12:03:18,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=840, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-14 12:03:18,186 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2024-06-14 12:03:18,186 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 840 flow [2024-06-14 12:03:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:18,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:18,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:03:18,187 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1990120853, now seen corresponding path program 1 times [2024-06-14 12:03:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761617300] [2024-06-14 12:03:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:19,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:19,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761617300] [2024-06-14 12:03:19,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761617300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:19,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:19,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:19,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719122806] [2024-06-14 12:03:19,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:19,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:19,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:19,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:19,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 840 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:19,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:19,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:19,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:20,075 INFO L124 PetriNetUnfolderBase]: 1859/2896 cut-off events. [2024-06-14 12:03:20,075 INFO L125 PetriNetUnfolderBase]: For 62078/62082 co-relation queries the response was YES. [2024-06-14 12:03:20,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16069 conditions, 2896 events. 1859/2896 cut-off events. For 62078/62082 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14917 event pairs, 603 based on Foata normal form. 6/2899 useless extension candidates. Maximal degree in co-relation 16027. Up to 2647 conditions per place. [2024-06-14 12:03:20,094 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 104 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-14 12:03:20,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1221 flow [2024-06-14 12:03:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:03:20,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 12:03:20,095 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 840 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:03:20,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1221 flow [2024-06-14 12:03:20,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 137 transitions, 1111 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:20,128 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 848 flow [2024-06-14 12:03:20,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=848, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-06-14 12:03:20,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 12:03:20,129 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 848 flow [2024-06-14 12:03:20,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:20,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:20,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:03:20,129 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:20,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1989874589, now seen corresponding path program 4 times [2024-06-14 12:03:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135110537] [2024-06-14 12:03:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:21,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:21,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135110537] [2024-06-14 12:03:21,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135110537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:21,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411888894] [2024-06-14 12:03:21,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:21,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:21,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:21,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:21,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 848 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:21,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:21,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:21,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:22,131 INFO L124 PetriNetUnfolderBase]: 1998/3065 cut-off events. [2024-06-14 12:03:22,131 INFO L125 PetriNetUnfolderBase]: For 67784/67786 co-relation queries the response was YES. [2024-06-14 12:03:22,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17179 conditions, 3065 events. 1998/3065 cut-off events. For 67784/67786 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15420 event pairs, 573 based on Foata normal form. 4/3066 useless extension candidates. Maximal degree in co-relation 17135. Up to 2573 conditions per place. [2024-06-14 12:03:22,153 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-14 12:03:22,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 149 transitions, 1373 flow [2024-06-14 12:03:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:03:22,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 12:03:22,155 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 848 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:03:22,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 149 transitions, 1373 flow [2024-06-14 12:03:22,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 1302 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:22,234 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 940 flow [2024-06-14 12:03:22,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=940, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-14 12:03:22,235 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 12:03:22,235 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 940 flow [2024-06-14 12:03:22,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:22,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:22,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:22,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:03:22,235 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:22,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1127230392, now seen corresponding path program 1 times [2024-06-14 12:03:22,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:22,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64060929] [2024-06-14 12:03:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:22,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:22,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:22,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64060929] [2024-06-14 12:03:22,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64060929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:22,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:22,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:22,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106547596] [2024-06-14 12:03:22,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:23,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:03:23,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 940 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:23,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:23,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:03:23,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:23,483 INFO L124 PetriNetUnfolderBase]: 1740/2774 cut-off events. [2024-06-14 12:03:23,483 INFO L125 PetriNetUnfolderBase]: For 72881/72886 co-relation queries the response was YES. [2024-06-14 12:03:23,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16510 conditions, 2774 events. 1740/2774 cut-off events. For 72881/72886 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14690 event pairs, 586 based on Foata normal form. 1/2757 useless extension candidates. Maximal degree in co-relation 16465. Up to 2549 conditions per place. [2024-06-14 12:03:23,500 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 103 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2024-06-14 12:03:23,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 1234 flow [2024-06-14 12:03:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 12:03:23,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 12:03:23,502 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 940 flow. Second operand 6 states and 124 transitions. [2024-06-14 12:03:23,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 1234 flow [2024-06-14 12:03:23,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 130 transitions, 1119 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:23,543 INFO L231 Difference]: Finished difference. Result has 105 places, 115 transitions, 887 flow [2024-06-14 12:03:23,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=887, PETRI_PLACES=105, PETRI_TRANSITIONS=115} [2024-06-14 12:03:23,543 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 12:03:23,544 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 115 transitions, 887 flow [2024-06-14 12:03:23,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:23,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:23,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:03:23,544 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)] === [2024-06-14 12:03:23,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:23,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1606474995, now seen corresponding path program 2 times [2024-06-14 12:03:23,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:23,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601944055] [2024-06-14 12:03:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:24,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:24,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601944055] [2024-06-14 12:03:24,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601944055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:24,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:24,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:24,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887516669] [2024-06-14 12:03:24,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:24,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:24,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:24,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 115 transitions, 887 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:24,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:24,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:24,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:25,267 INFO L124 PetriNetUnfolderBase]: 1914/2990 cut-off events. [2024-06-14 12:03:25,267 INFO L125 PetriNetUnfolderBase]: For 78934/78942 co-relation queries the response was YES. [2024-06-14 12:03:25,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17575 conditions, 2990 events. 1914/2990 cut-off events. For 78934/78942 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15465 event pairs, 608 based on Foata normal form. 10/2990 useless extension candidates. Maximal degree in co-relation 17529. Up to 2725 conditions per place. [2024-06-14 12:03:25,284 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 29 changer transitions 0/147 dead transitions. [2024-06-14 12:03:25,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 147 transitions, 1308 flow [2024-06-14 12:03:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:03:25,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 12:03:25,286 INFO L175 Difference]: Start difference. First operand has 105 places, 115 transitions, 887 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:03:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 147 transitions, 1308 flow [2024-06-14 12:03:25,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 1268 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:25,325 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 1015 flow [2024-06-14 12:03:25,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1015, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-14 12:03:25,325 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-14 12:03:25,325 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 1015 flow [2024-06-14 12:03:25,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:25,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:25,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:25,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:03:25,326 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)] === [2024-06-14 12:03:25,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash -357704889, now seen corresponding path program 3 times [2024-06-14 12:03:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798511731] [2024-06-14 12:03:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:26,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:26,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798511731] [2024-06-14 12:03:26,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798511731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:26,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:26,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:26,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521821320] [2024-06-14 12:03:26,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:26,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:26,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:26,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:26,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 1015 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:26,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:26,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:26,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:27,039 INFO L124 PetriNetUnfolderBase]: 1931/3017 cut-off events. [2024-06-14 12:03:27,039 INFO L125 PetriNetUnfolderBase]: For 86639/86647 co-relation queries the response was YES. [2024-06-14 12:03:27,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18386 conditions, 3017 events. 1931/3017 cut-off events. For 86639/86647 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15642 event pairs, 579 based on Foata normal form. 10/3003 useless extension candidates. Maximal degree in co-relation 18338. Up to 2669 conditions per place. [2024-06-14 12:03:27,061 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 36 changer transitions 0/154 dead transitions. [2024-06-14 12:03:27,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1547 flow [2024-06-14 12:03:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:03:27,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 12:03:27,062 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 1015 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:03:27,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1547 flow [2024-06-14 12:03:27,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 154 transitions, 1480 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:27,093 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 1115 flow [2024-06-14 12:03:27,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2024-06-14 12:03:27,094 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-14 12:03:27,094 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 1115 flow [2024-06-14 12:03:27,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:27,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:27,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:27,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:03:27,094 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)] === [2024-06-14 12:03:27,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1321375125, now seen corresponding path program 4 times [2024-06-14 12:03:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297085357] [2024-06-14 12:03:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:28,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297085357] [2024-06-14 12:03:28,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297085357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:28,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:28,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:28,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027488541] [2024-06-14 12:03:28,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:28,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:28,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:28,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:28,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 1115 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:28,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:28,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:28,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:28,768 INFO L124 PetriNetUnfolderBase]: 1923/3005 cut-off events. [2024-06-14 12:03:28,768 INFO L125 PetriNetUnfolderBase]: For 91471/91479 co-relation queries the response was YES. [2024-06-14 12:03:28,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18225 conditions, 3005 events. 1923/3005 cut-off events. For 91471/91479 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15610 event pairs, 618 based on Foata normal form. 10/2991 useless extension candidates. Maximal degree in co-relation 18176. Up to 2740 conditions per place. [2024-06-14 12:03:28,784 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 113 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-14 12:03:28,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 151 transitions, 1457 flow [2024-06-14 12:03:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:03:28,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:03:28,785 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 1115 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:03:28,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 151 transitions, 1457 flow [2024-06-14 12:03:28,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 151 transitions, 1359 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:28,830 INFO L231 Difference]: Finished difference. Result has 119 places, 127 transitions, 1080 flow [2024-06-14 12:03:28,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1080, PETRI_PLACES=119, PETRI_TRANSITIONS=127} [2024-06-14 12:03:28,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-14 12:03:28,830 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 127 transitions, 1080 flow [2024-06-14 12:03:28,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:28,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:28,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:03:28,831 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:28,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1321128861, now seen corresponding path program 5 times [2024-06-14 12:03:28,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159437122] [2024-06-14 12:03:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:29,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:29,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159437122] [2024-06-14 12:03:29,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159437122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:29,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:29,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:29,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203107080] [2024-06-14 12:03:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:29,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:29,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:29,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 127 transitions, 1080 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:29,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:29,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:29,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:30,609 INFO L124 PetriNetUnfolderBase]: 2030/3114 cut-off events. [2024-06-14 12:03:30,610 INFO L125 PetriNetUnfolderBase]: For 95355/95361 co-relation queries the response was YES. [2024-06-14 12:03:30,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18756 conditions, 3114 events. 2030/3114 cut-off events. For 95355/95361 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15631 event pairs, 578 based on Foata normal form. 5/3115 useless extension candidates. Maximal degree in co-relation 18705. Up to 2621 conditions per place. [2024-06-14 12:03:30,632 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 93 selfloop transitions, 60 changer transitions 0/158 dead transitions. [2024-06-14 12:03:30,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 158 transitions, 1470 flow [2024-06-14 12:03:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:03:30,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 12:03:30,633 INFO L175 Difference]: Start difference. First operand has 119 places, 127 transitions, 1080 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:03:30,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 158 transitions, 1470 flow [2024-06-14 12:03:30,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 158 transitions, 1353 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 12:03:30,688 INFO L231 Difference]: Finished difference. Result has 119 places, 127 transitions, 1091 flow [2024-06-14 12:03:30,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1091, PETRI_PLACES=119, PETRI_TRANSITIONS=127} [2024-06-14 12:03:30,688 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-14 12:03:30,688 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 127 transitions, 1091 flow [2024-06-14 12:03:30,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:30,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:30,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:30,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:03:30,689 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:30,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2037421184, now seen corresponding path program 2 times [2024-06-14 12:03:30,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:30,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899158109] [2024-06-14 12:03:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:30,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:31,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899158109] [2024-06-14 12:03:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899158109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:31,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:31,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710028550] [2024-06-14 12:03:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:31,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:31,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:31,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:03:31,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 127 transitions, 1091 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:31,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:31,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:03:31,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:31,935 INFO L124 PetriNetUnfolderBase]: 1764/2821 cut-off events. [2024-06-14 12:03:31,935 INFO L125 PetriNetUnfolderBase]: For 99908/99921 co-relation queries the response was YES. [2024-06-14 12:03:31,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17949 conditions, 2821 events. 1764/2821 cut-off events. For 99908/99921 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15023 event pairs, 596 based on Foata normal form. 7/2809 useless extension candidates. Maximal degree in co-relation 17899. Up to 2583 conditions per place. [2024-06-14 12:03:31,958 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 107 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-06-14 12:03:31,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 1397 flow [2024-06-14 12:03:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 12:03:31,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:03:31,959 INFO L175 Difference]: Start difference. First operand has 119 places, 127 transitions, 1091 flow. Second operand 6 states and 120 transitions. [2024-06-14 12:03:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 1397 flow [2024-06-14 12:03:32,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 139 transitions, 1198 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 12:03:32,012 INFO L231 Difference]: Finished difference. Result has 115 places, 130 transitions, 974 flow [2024-06-14 12:03:32,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=974, PETRI_PLACES=115, PETRI_TRANSITIONS=130} [2024-06-14 12:03:32,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-14 12:03:32,013 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 130 transitions, 974 flow [2024-06-14 12:03:32,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:32,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:32,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:32,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:03:32,013 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:32,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:32,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2043127168, now seen corresponding path program 1 times [2024-06-14 12:03:32,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:32,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241699260] [2024-06-14 12:03:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:32,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:32,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:32,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241699260] [2024-06-14 12:03:32,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241699260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:32,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:32,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:32,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811382341] [2024-06-14 12:03:32,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:32,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:32,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:32,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:03:32,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 130 transitions, 974 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:32,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:32,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:03:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:33,258 INFO L124 PetriNetUnfolderBase]: 1691/2746 cut-off events. [2024-06-14 12:03:33,259 INFO L125 PetriNetUnfolderBase]: For 89534/89534 co-relation queries the response was YES. [2024-06-14 12:03:33,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16628 conditions, 2746 events. 1691/2746 cut-off events. For 89534/89534 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14708 event pairs, 504 based on Foata normal form. 2/2739 useless extension candidates. Maximal degree in co-relation 16577. Up to 2487 conditions per place. [2024-06-14 12:03:33,331 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 124 selfloop transitions, 11 changer transitions 0/146 dead transitions. [2024-06-14 12:03:33,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 146 transitions, 1312 flow [2024-06-14 12:03:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 12:03:33,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 12:03:33,333 INFO L175 Difference]: Start difference. First operand has 115 places, 130 transitions, 974 flow. Second operand 6 states and 122 transitions. [2024-06-14 12:03:33,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 146 transitions, 1312 flow [2024-06-14 12:03:33,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 146 transitions, 1252 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:33,387 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 982 flow [2024-06-14 12:03:33,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=982, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2024-06-14 12:03:33,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-14 12:03:33,388 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 982 flow [2024-06-14 12:03:33,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:33,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:33,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:33,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:03:33,388 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:33,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:33,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2037413248, now seen corresponding path program 2 times [2024-06-14 12:03:33,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:33,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443525634] [2024-06-14 12:03:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:33,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:34,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443525634] [2024-06-14 12:03:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443525634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:34,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:34,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:34,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975311263] [2024-06-14 12:03:34,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:34,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:34,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:34,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:03:34,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 982 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:34,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:34,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:03:34,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:34,715 INFO L124 PetriNetUnfolderBase]: 1693/2752 cut-off events. [2024-06-14 12:03:34,715 INFO L125 PetriNetUnfolderBase]: For 94581/94583 co-relation queries the response was YES. [2024-06-14 12:03:34,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17077 conditions, 2752 events. 1693/2752 cut-off events. For 94581/94583 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14762 event pairs, 508 based on Foata normal form. 4/2747 useless extension candidates. Maximal degree in co-relation 17025. Up to 2481 conditions per place. [2024-06-14 12:03:34,736 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 120 selfloop transitions, 16 changer transitions 0/147 dead transitions. [2024-06-14 12:03:34,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 147 transitions, 1324 flow [2024-06-14 12:03:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 12:03:34,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 12:03:34,737 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 982 flow. Second operand 6 states and 122 transitions. [2024-06-14 12:03:34,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 147 transitions, 1324 flow [2024-06-14 12:03:34,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 147 transitions, 1278 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:34,796 INFO L231 Difference]: Finished difference. Result has 119 places, 136 transitions, 1020 flow [2024-06-14 12:03:34,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=119, PETRI_TRANSITIONS=136} [2024-06-14 12:03:34,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-14 12:03:34,796 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 136 transitions, 1020 flow [2024-06-14 12:03:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:34,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:34,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:34,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:03:34,797 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:34,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash 19521667, now seen corresponding path program 1 times [2024-06-14 12:03:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:34,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167827577] [2024-06-14 12:03:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:35,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167827577] [2024-06-14 12:03:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167827577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:35,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751137214] [2024-06-14 12:03:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:35,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:35,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 1020 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:35,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:35,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:35,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:36,771 INFO L124 PetriNetUnfolderBase]: 2056/3155 cut-off events. [2024-06-14 12:03:36,771 INFO L125 PetriNetUnfolderBase]: For 120271/120273 co-relation queries the response was YES. [2024-06-14 12:03:36,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20403 conditions, 3155 events. 2056/3155 cut-off events. For 120271/120273 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15840 event pairs, 579 based on Foata normal form. 4/3156 useless extension candidates. Maximal degree in co-relation 20350. Up to 2870 conditions per place. [2024-06-14 12:03:36,799 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 130 selfloop transitions, 41 changer transitions 0/176 dead transitions. [2024-06-14 12:03:36,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1508 flow [2024-06-14 12:03:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:03:36,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-14 12:03:36,801 INFO L175 Difference]: Start difference. First operand has 119 places, 136 transitions, 1020 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:03:36,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1508 flow [2024-06-14 12:03:36,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1446 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:36,868 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1113 flow [2024-06-14 12:03:36,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1113, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-06-14 12:03:36,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 12:03:36,868 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1113 flow [2024-06-14 12:03:36,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:36,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:36,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:36,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:03:36,869 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:36,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash 850788956, now seen corresponding path program 1 times [2024-06-14 12:03:36,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469632099] [2024-06-14 12:03:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:37,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:37,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469632099] [2024-06-14 12:03:37,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469632099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:37,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:37,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222023786] [2024-06-14 12:03:37,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:37,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:37,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:37,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:37,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1113 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:37,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:37,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:38,343 INFO L124 PetriNetUnfolderBase]: 1915/3001 cut-off events. [2024-06-14 12:03:38,343 INFO L125 PetriNetUnfolderBase]: For 126482/126482 co-relation queries the response was YES. [2024-06-14 12:03:38,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20584 conditions, 3001 events. 1915/3001 cut-off events. For 126482/126482 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15506 event pairs, 567 based on Foata normal form. 1/2986 useless extension candidates. Maximal degree in co-relation 20529. Up to 2813 conditions per place. [2024-06-14 12:03:38,362 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 141 selfloop transitions, 14 changer transitions 0/166 dead transitions. [2024-06-14 12:03:38,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1519 flow [2024-06-14 12:03:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:03:38,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:03:38,363 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1113 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:03:38,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1519 flow [2024-06-14 12:03:38,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 166 transitions, 1406 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:38,425 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1080 flow [2024-06-14 12:03:38,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1080, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2024-06-14 12:03:38,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-14 12:03:38,426 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1080 flow [2024-06-14 12:03:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:38,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:38,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:38,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:03:38,426 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)] === [2024-06-14 12:03:38,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1563936979, now seen corresponding path program 2 times [2024-06-14 12:03:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:38,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091599309] [2024-06-14 12:03:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:38,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:39,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:39,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091599309] [2024-06-14 12:03:39,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091599309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:39,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:39,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204162315] [2024-06-14 12:03:39,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:39,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:39,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:39,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:39,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1080 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:39,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:39,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:39,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:40,471 INFO L124 PetriNetUnfolderBase]: 2089/3210 cut-off events. [2024-06-14 12:03:40,472 INFO L125 PetriNetUnfolderBase]: For 135694/135696 co-relation queries the response was YES. [2024-06-14 12:03:40,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21709 conditions, 3210 events. 2089/3210 cut-off events. For 135694/135696 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16228 event pairs, 585 based on Foata normal form. 4/3211 useless extension candidates. Maximal degree in co-relation 21653. Up to 2916 conditions per place. [2024-06-14 12:03:40,499 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 135 selfloop transitions, 44 changer transitions 0/184 dead transitions. [2024-06-14 12:03:40,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 1607 flow [2024-06-14 12:03:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:03:40,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:03:40,501 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1080 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:03:40,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 1607 flow [2024-06-14 12:03:40,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 184 transitions, 1549 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:40,568 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1218 flow [2024-06-14 12:03:40,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1218, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-14 12:03:40,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 12:03:40,568 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1218 flow [2024-06-14 12:03:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:40,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:40,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:40,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:03:40,569 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:40,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:40,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1564205749, now seen corresponding path program 3 times [2024-06-14 12:03:40,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:40,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119734663] [2024-06-14 12:03:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:40,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:41,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:41,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119734663] [2024-06-14 12:03:41,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119734663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:41,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:41,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285242324] [2024-06-14 12:03:41,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:41,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:41,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:41,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1218 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:41,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:41,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:42,491 INFO L124 PetriNetUnfolderBase]: 2131/3281 cut-off events. [2024-06-14 12:03:42,492 INFO L125 PetriNetUnfolderBase]: For 148013/148015 co-relation queries the response was YES. [2024-06-14 12:03:42,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22978 conditions, 3281 events. 2131/3281 cut-off events. For 148013/148015 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16674 event pairs, 583 based on Foata normal form. 4/3282 useless extension candidates. Maximal degree in co-relation 22920. Up to 2899 conditions per place. [2024-06-14 12:03:42,513 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 135 selfloop transitions, 51 changer transitions 0/191 dead transitions. [2024-06-14 12:03:42,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 1900 flow [2024-06-14 12:03:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:03:42,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 12:03:42,515 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1218 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:03:42,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 1900 flow [2024-06-14 12:03:42,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 191 transitions, 1797 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:42,578 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1326 flow [2024-06-14 12:03:42,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1326, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2024-06-14 12:03:42,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-14 12:03:42,578 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1326 flow [2024-06-14 12:03:42,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:42,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:42,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:42,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:03:42,579 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:42,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1556787139, now seen corresponding path program 4 times [2024-06-14 12:03:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105180517] [2024-06-14 12:03:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:43,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:43,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105180517] [2024-06-14 12:03:43,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105180517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:43,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:43,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:43,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747562244] [2024-06-14 12:03:43,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:43,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:43,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:43,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:43,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:43,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:43,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1326 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:43,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:43,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:44,483 INFO L124 PetriNetUnfolderBase]: 2123/3269 cut-off events. [2024-06-14 12:03:44,483 INFO L125 PetriNetUnfolderBase]: For 153864/153866 co-relation queries the response was YES. [2024-06-14 12:03:44,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22962 conditions, 3269 events. 2123/3269 cut-off events. For 153864/153866 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16587 event pairs, 590 based on Foata normal form. 4/3270 useless extension candidates. Maximal degree in co-relation 22903. Up to 2970 conditions per place. [2024-06-14 12:03:44,507 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 140 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2024-06-14 12:03:44,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 188 transitions, 1776 flow [2024-06-14 12:03:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:03:44,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-14 12:03:44,508 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1326 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:03:44,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 188 transitions, 1776 flow [2024-06-14 12:03:44,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 1650 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:44,583 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1293 flow [2024-06-14 12:03:44,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-06-14 12:03:44,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 12:03:44,584 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1293 flow [2024-06-14 12:03:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:44,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:44,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:03:44,585 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:44,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 851147440, now seen corresponding path program 1 times [2024-06-14 12:03:44,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:44,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368898557] [2024-06-14 12:03:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:45,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368898557] [2024-06-14 12:03:45,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368898557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:45,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:45,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361875087] [2024-06-14 12:03:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:45,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:03:45,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:03:45,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:45,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:03:45,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:46,234 INFO L124 PetriNetUnfolderBase]: 1881/3014 cut-off events. [2024-06-14 12:03:46,234 INFO L125 PetriNetUnfolderBase]: For 157967/157967 co-relation queries the response was YES. [2024-06-14 12:03:46,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21958 conditions, 3014 events. 1881/3014 cut-off events. For 157967/157967 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16188 event pairs, 576 based on Foata normal form. 1/3006 useless extension candidates. Maximal degree in co-relation 21897. Up to 2704 conditions per place. [2024-06-14 12:03:46,258 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 137 selfloop transitions, 14 changer transitions 0/175 dead transitions. [2024-06-14 12:03:46,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 175 transitions, 1675 flow [2024-06-14 12:03:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:03:46,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:03:46,259 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1293 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:03:46,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 175 transitions, 1675 flow [2024-06-14 12:03:46,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 175 transitions, 1550 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 12:03:46,337 INFO L231 Difference]: Finished difference. Result has 138 places, 159 transitions, 1248 flow [2024-06-14 12:03:46,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1248, PETRI_PLACES=138, PETRI_TRANSITIONS=159} [2024-06-14 12:03:46,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-14 12:03:46,337 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 159 transitions, 1248 flow [2024-06-14 12:03:46,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:03:46,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:46,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:46,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:03:46,338 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:46,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:46,338 INFO L85 PathProgramCache]: Analyzing trace with hash 851147006, now seen corresponding path program 2 times [2024-06-14 12:03:46,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:46,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734269816] [2024-06-14 12:03:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:46,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734269816] [2024-06-14 12:03:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734269816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:47,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:47,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394469254] [2024-06-14 12:03:47,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:47,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:47,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:47,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:47,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:47,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 159 transitions, 1248 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:47,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:47,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:47,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:47,709 INFO L124 PetriNetUnfolderBase]: 1987/3122 cut-off events. [2024-06-14 12:03:47,710 INFO L125 PetriNetUnfolderBase]: For 166532/166532 co-relation queries the response was YES. [2024-06-14 12:03:47,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23026 conditions, 3122 events. 1987/3122 cut-off events. For 166532/166532 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16315 event pairs, 576 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 22965. Up to 2918 conditions per place. [2024-06-14 12:03:47,735 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 148 selfloop transitions, 19 changer transitions 0/178 dead transitions. [2024-06-14 12:03:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 178 transitions, 1674 flow [2024-06-14 12:03:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:03:47,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 12:03:47,736 INFO L175 Difference]: Start difference. First operand has 138 places, 159 transitions, 1248 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:03:47,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 178 transitions, 1674 flow [2024-06-14 12:03:47,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 178 transitions, 1616 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:47,810 INFO L231 Difference]: Finished difference. Result has 140 places, 162 transitions, 1292 flow [2024-06-14 12:03:47,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=140, PETRI_TRANSITIONS=162} [2024-06-14 12:03:47,810 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 12:03:47,810 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 162 transitions, 1292 flow [2024-06-14 12:03:47,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:47,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:47,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:03:47,811 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)] === [2024-06-14 12:03:47,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1425182027, now seen corresponding path program 5 times [2024-06-14 12:03:47,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630837613] [2024-06-14 12:03:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:48,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630837613] [2024-06-14 12:03:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630837613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:48,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592835064] [2024-06-14 12:03:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:48,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:48,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 162 transitions, 1292 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:48,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:48,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:48,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:49,714 INFO L124 PetriNetUnfolderBase]: 2186/3363 cut-off events. [2024-06-14 12:03:49,714 INFO L125 PetriNetUnfolderBase]: For 181117/181125 co-relation queries the response was YES. [2024-06-14 12:03:49,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24786 conditions, 3363 events. 2186/3363 cut-off events. For 181117/181125 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17098 event pairs, 597 based on Foata normal form. 7/3367 useless extension candidates. Maximal degree in co-relation 24724. Up to 3015 conditions per place. [2024-06-14 12:03:49,737 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-06-14 12:03:49,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 2052 flow [2024-06-14 12:03:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:03:49,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:03:49,738 INFO L175 Difference]: Start difference. First operand has 140 places, 162 transitions, 1292 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:03:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 2052 flow [2024-06-14 12:03:49,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 203 transitions, 1972 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:49,820 INFO L231 Difference]: Finished difference. Result has 145 places, 172 transitions, 1505 flow [2024-06-14 12:03:49,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1505, PETRI_PLACES=145, PETRI_TRANSITIONS=172} [2024-06-14 12:03:49,821 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 12:03:49,821 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 172 transitions, 1505 flow [2024-06-14 12:03:49,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:49,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:49,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:03:49,821 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:49,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -53691753, now seen corresponding path program 6 times [2024-06-14 12:03:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409501883] [2024-06-14 12:03:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:49,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:51,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409501883] [2024-06-14 12:03:51,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409501883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:51,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:51,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259250180] [2024-06-14 12:03:51,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:51,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:51,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:51,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 172 transitions, 1505 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:51,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:51,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:51,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:52,263 INFO L124 PetriNetUnfolderBase]: 2178/3362 cut-off events. [2024-06-14 12:03:52,263 INFO L125 PetriNetUnfolderBase]: For 189130/189132 co-relation queries the response was YES. [2024-06-14 12:03:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25334 conditions, 3362 events. 2178/3362 cut-off events. For 189130/189132 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17178 event pairs, 588 based on Foata normal form. 6/3364 useless extension candidates. Maximal degree in co-relation 25270. Up to 3050 conditions per place. [2024-06-14 12:03:52,299 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 145 selfloop transitions, 53 changer transitions 0/203 dead transitions. [2024-06-14 12:03:52,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 203 transitions, 1995 flow [2024-06-14 12:03:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 12:03:52,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:03:52,300 INFO L175 Difference]: Start difference. First operand has 145 places, 172 transitions, 1505 flow. Second operand 10 states and 185 transitions. [2024-06-14 12:03:52,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 203 transitions, 1995 flow [2024-06-14 12:03:52,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 203 transitions, 1884 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-14 12:03:52,406 INFO L231 Difference]: Finished difference. Result has 154 places, 174 transitions, 1524 flow [2024-06-14 12:03:52,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1524, PETRI_PLACES=154, PETRI_TRANSITIONS=174} [2024-06-14 12:03:52,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-14 12:03:52,406 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 174 transitions, 1524 flow [2024-06-14 12:03:52,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:52,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:52,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:52,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:03:52,407 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:52,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -310192263, now seen corresponding path program 7 times [2024-06-14 12:03:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:52,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347984634] [2024-06-14 12:03:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:52,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:53,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:53,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347984634] [2024-06-14 12:03:53,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347984634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:53,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:53,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:53,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833350752] [2024-06-14 12:03:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:53,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:53,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:53,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 174 transitions, 1524 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:53,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:53,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:53,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:54,368 INFO L124 PetriNetUnfolderBase]: 2206/3399 cut-off events. [2024-06-14 12:03:54,368 INFO L125 PetriNetUnfolderBase]: For 196877/196885 co-relation queries the response was YES. [2024-06-14 12:03:54,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25466 conditions, 3399 events. 2206/3399 cut-off events. For 196877/196885 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17382 event pairs, 595 based on Foata normal form. 7/3403 useless extension candidates. Maximal degree in co-relation 25399. Up to 3089 conditions per place. [2024-06-14 12:03:54,396 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 148 selfloop transitions, 53 changer transitions 0/206 dead transitions. [2024-06-14 12:03:54,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 206 transitions, 2088 flow [2024-06-14 12:03:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:03:54,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:03:54,398 INFO L175 Difference]: Start difference. First operand has 154 places, 174 transitions, 1524 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:03:54,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 206 transitions, 2088 flow [2024-06-14 12:03:54,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 206 transitions, 1978 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:54,562 INFO L231 Difference]: Finished difference. Result has 156 places, 179 transitions, 1625 flow [2024-06-14 12:03:54,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1625, PETRI_PLACES=156, PETRI_TRANSITIONS=179} [2024-06-14 12:03:54,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-14 12:03:54,563 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 179 transitions, 1625 flow [2024-06-14 12:03:54,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:54,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:54,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:03:54,563 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:54,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1987311405, now seen corresponding path program 8 times [2024-06-14 12:03:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:54,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596124881] [2024-06-14 12:03:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:55,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:55,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596124881] [2024-06-14 12:03:55,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596124881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:55,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:55,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995193204] [2024-06-14 12:03:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:55,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:55,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:55,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:55,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 179 transitions, 1625 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:55,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:55,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:55,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:56,618 INFO L124 PetriNetUnfolderBase]: 2223/3431 cut-off events. [2024-06-14 12:03:56,618 INFO L125 PetriNetUnfolderBase]: For 208053/208061 co-relation queries the response was YES. [2024-06-14 12:03:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26070 conditions, 3431 events. 2223/3431 cut-off events. For 208053/208061 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17614 event pairs, 605 based on Foata normal form. 7/3435 useless extension candidates. Maximal degree in co-relation 26001. Up to 3116 conditions per place. [2024-06-14 12:03:56,646 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 151 selfloop transitions, 52 changer transitions 0/208 dead transitions. [2024-06-14 12:03:56,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 208 transitions, 2161 flow [2024-06-14 12:03:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:03:56,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:03:56,647 INFO L175 Difference]: Start difference. First operand has 156 places, 179 transitions, 1625 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:03:56,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 208 transitions, 2161 flow [2024-06-14 12:03:56,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 208 transitions, 1982 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:56,784 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 1623 flow [2024-06-14 12:03:56,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1623, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-14 12:03:56,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 12:03:56,785 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 1623 flow [2024-06-14 12:03:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:56,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:56,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:56,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:03:56,786 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)] === [2024-06-14 12:03:56,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1783197963, now seen corresponding path program 9 times [2024-06-14 12:03:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:56,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013624343] [2024-06-14 12:03:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:56,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013624343] [2024-06-14 12:03:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013624343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:57,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:57,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447737109] [2024-06-14 12:03:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:57,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:57,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:57,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 1623 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:57,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:57,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:57,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:58,685 INFO L124 PetriNetUnfolderBase]: 2240/3463 cut-off events. [2024-06-14 12:03:58,686 INFO L125 PetriNetUnfolderBase]: For 218662/218670 co-relation queries the response was YES. [2024-06-14 12:03:58,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26485 conditions, 3463 events. 2240/3463 cut-off events. For 218662/218670 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17855 event pairs, 610 based on Foata normal form. 7/3467 useless extension candidates. Maximal degree in co-relation 26417. Up to 3084 conditions per place. [2024-06-14 12:03:58,715 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 149 selfloop transitions, 57 changer transitions 0/211 dead transitions. [2024-06-14 12:03:58,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 2171 flow [2024-06-14 12:03:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:03:58,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 12:03:58,716 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 1623 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:03:58,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 2171 flow [2024-06-14 12:03:58,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 211 transitions, 2000 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:58,822 INFO L231 Difference]: Finished difference. Result has 160 places, 183 transitions, 1643 flow [2024-06-14 12:03:58,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1643, PETRI_PLACES=160, PETRI_TRANSITIONS=183} [2024-06-14 12:03:58,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-14 12:03:58,823 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 183 transitions, 1643 flow [2024-06-14 12:03:58,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:58,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:58,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:58,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:03:58,823 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)] === [2024-06-14 12:03:58,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1414140137, now seen corresponding path program 10 times [2024-06-14 12:03:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395220379] [2024-06-14 12:03:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:59,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:59,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395220379] [2024-06-14 12:03:59,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395220379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:59,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:59,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704403537] [2024-06-14 12:03:59,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:59,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:59,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:59,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:59,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 183 transitions, 1643 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:59,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:59,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:00,729 INFO L124 PetriNetUnfolderBase]: 2232/3446 cut-off events. [2024-06-14 12:04:00,729 INFO L125 PetriNetUnfolderBase]: For 225160/225168 co-relation queries the response was YES. [2024-06-14 12:04:00,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26464 conditions, 3446 events. 2232/3446 cut-off events. For 225160/225168 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17725 event pairs, 544 based on Foata normal form. 7/3450 useless extension candidates. Maximal degree in co-relation 26395. Up to 2854 conditions per place. [2024-06-14 12:04:00,757 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 78 changer transitions 0/214 dead transitions. [2024-06-14 12:04:00,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 214 transitions, 2203 flow [2024-06-14 12:04:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:04:00,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:04:00,759 INFO L175 Difference]: Start difference. First operand has 160 places, 183 transitions, 1643 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:04:00,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 214 transitions, 2203 flow [2024-06-14 12:04:00,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 214 transitions, 2030 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:00,888 INFO L231 Difference]: Finished difference. Result has 162 places, 185 transitions, 1707 flow [2024-06-14 12:04:00,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1707, PETRI_PLACES=162, PETRI_TRANSITIONS=185} [2024-06-14 12:04:00,888 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-14 12:04:00,889 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 185 transitions, 1707 flow [2024-06-14 12:04:00,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:00,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:00,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:00,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:04:00,889 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:00,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1258521810, now seen corresponding path program 2 times [2024-06-14 12:04:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:00,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494500410] [2024-06-14 12:04:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494500410] [2024-06-14 12:04:01,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494500410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:01,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:01,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572688381] [2024-06-14 12:04:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:01,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:04:01,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 185 transitions, 1707 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:01,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:01,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:04:01,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:02,508 INFO L124 PetriNetUnfolderBase]: 1981/3181 cut-off events. [2024-06-14 12:04:02,508 INFO L125 PetriNetUnfolderBase]: For 228862/228870 co-relation queries the response was YES. [2024-06-14 12:04:02,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25250 conditions, 3181 events. 1981/3181 cut-off events. For 228862/228870 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17234 event pairs, 591 based on Foata normal form. 7/3178 useless extension candidates. Maximal degree in co-relation 25180. Up to 2805 conditions per place. [2024-06-14 12:04:02,532 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 26 changer transitions 0/204 dead transitions. [2024-06-14 12:04:02,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 204 transitions, 2266 flow [2024-06-14 12:04:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:04:02,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 12:04:02,534 INFO L175 Difference]: Start difference. First operand has 162 places, 185 transitions, 1707 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:04:02,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 204 transitions, 2266 flow [2024-06-14 12:04:02,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 204 transitions, 2047 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:02,626 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 1671 flow [2024-06-14 12:04:02,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1671, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2024-06-14 12:04:02,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-14 12:04:02,626 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 1671 flow [2024-06-14 12:04:02,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:02,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:02,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:02,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:04:02,627 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:02,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1264453886, now seen corresponding path program 3 times [2024-06-14 12:04:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:02,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301562677] [2024-06-14 12:04:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:03,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:03,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301562677] [2024-06-14 12:04:03,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301562677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:03,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:03,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110073886] [2024-06-14 12:04:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:03,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:03,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 1671 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:03,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:03,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:03,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:04,105 INFO L124 PetriNetUnfolderBase]: 2088/3283 cut-off events. [2024-06-14 12:04:04,105 INFO L125 PetriNetUnfolderBase]: For 240625/240633 co-relation queries the response was YES. [2024-06-14 12:04:04,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26284 conditions, 3283 events. 2088/3283 cut-off events. For 240625/240633 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17247 event pairs, 598 based on Foata normal form. 4/3270 useless extension candidates. Maximal degree in co-relation 26212. Up to 3067 conditions per place. [2024-06-14 12:04:04,133 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 167 selfloop transitions, 27 changer transitions 0/205 dead transitions. [2024-06-14 12:04:04,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 205 transitions, 2151 flow [2024-06-14 12:04:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:04:04,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:04:04,135 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 1671 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:04:04,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 205 transitions, 2151 flow [2024-06-14 12:04:04,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 205 transitions, 2087 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:04,251 INFO L231 Difference]: Finished difference. Result has 167 places, 196 transitions, 1743 flow [2024-06-14 12:04:04,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1743, PETRI_PLACES=167, PETRI_TRANSITIONS=196} [2024-06-14 12:04:04,251 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-14 12:04:04,251 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 196 transitions, 1743 flow [2024-06-14 12:04:04,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:04,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:04,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:04:04,252 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:04,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1258507860, now seen corresponding path program 3 times [2024-06-14 12:04:04,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:04,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510675960] [2024-06-14 12:04:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510675960] [2024-06-14 12:04:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510675960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:05,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:05,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:05,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012909445] [2024-06-14 12:04:05,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:05,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:05,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:05,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:04:05,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 196 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:05,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:05,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:04:05,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:05,980 INFO L124 PetriNetUnfolderBase]: 1979/3172 cut-off events. [2024-06-14 12:04:05,981 INFO L125 PetriNetUnfolderBase]: For 245413/245421 co-relation queries the response was YES. [2024-06-14 12:04:05,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25631 conditions, 3172 events. 1979/3172 cut-off events. For 245413/245421 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17109 event pairs, 591 based on Foata normal form. 7/3162 useless extension candidates. Maximal degree in co-relation 25557. Up to 2812 conditions per place. [2024-06-14 12:04:06,009 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-14 12:04:06,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 207 transitions, 2119 flow [2024-06-14 12:04:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:04:06,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 12:04:06,010 INFO L175 Difference]: Start difference. First operand has 167 places, 196 transitions, 1743 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:04:06,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 207 transitions, 2119 flow [2024-06-14 12:04:06,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 207 transitions, 1975 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:06,167 INFO L231 Difference]: Finished difference. Result has 169 places, 197 transitions, 1652 flow [2024-06-14 12:04:06,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1652, PETRI_PLACES=169, PETRI_TRANSITIONS=197} [2024-06-14 12:04:06,168 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-14 12:04:06,168 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 197 transitions, 1652 flow [2024-06-14 12:04:06,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:06,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:06,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:04:06,168 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:06,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1087448660, now seen corresponding path program 1 times [2024-06-14 12:04:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573442888] [2024-06-14 12:04:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573442888] [2024-06-14 12:04:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573442888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:07,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:07,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451197896] [2024-06-14 12:04:07,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:07,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:07,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:07,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:04:07,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 197 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:07,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:07,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:04:07,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:07,724 INFO L124 PetriNetUnfolderBase]: 1991/3201 cut-off events. [2024-06-14 12:04:07,724 INFO L125 PetriNetUnfolderBase]: For 252830/252830 co-relation queries the response was YES. [2024-06-14 12:04:07,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25583 conditions, 3201 events. 1991/3201 cut-off events. For 252830/252830 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17277 event pairs, 533 based on Foata normal form. 1/3200 useless extension candidates. Maximal degree in co-relation 25508. Up to 2787 conditions per place. [2024-06-14 12:04:07,752 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 167 selfloop transitions, 14 changer transitions 0/216 dead transitions. [2024-06-14 12:04:07,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 216 transitions, 2109 flow [2024-06-14 12:04:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:04:07,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:07,753 INFO L175 Difference]: Start difference. First operand has 169 places, 197 transitions, 1652 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:04:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 216 transitions, 2109 flow [2024-06-14 12:04:07,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2067 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:07,957 INFO L231 Difference]: Finished difference. Result has 171 places, 200 transitions, 1702 flow [2024-06-14 12:04:07,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1702, PETRI_PLACES=171, PETRI_TRANSITIONS=200} [2024-06-14 12:04:07,958 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-14 12:04:07,958 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 200 transitions, 1702 flow [2024-06-14 12:04:07,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:07,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:07,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:07,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:04:07,958 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:07,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1087568816, now seen corresponding path program 1 times [2024-06-14 12:04:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:07,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523388186] [2024-06-14 12:04:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:08,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:08,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523388186] [2024-06-14 12:04:08,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523388186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:08,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:08,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949600222] [2024-06-14 12:04:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:08,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:09,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:04:09,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 200 transitions, 1702 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:09,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:09,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:04:09,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:09,665 INFO L124 PetriNetUnfolderBase]: 2016/3238 cut-off events. [2024-06-14 12:04:09,665 INFO L125 PetriNetUnfolderBase]: For 269029/269029 co-relation queries the response was YES. [2024-06-14 12:04:09,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26275 conditions, 3238 events. 2016/3238 cut-off events. For 269029/269029 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17493 event pairs, 533 based on Foata normal form. 6/3242 useless extension candidates. Maximal degree in co-relation 26199. Up to 2814 conditions per place. [2024-06-14 12:04:09,696 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 169 selfloop transitions, 15 changer transitions 0/219 dead transitions. [2024-06-14 12:04:09,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 219 transitions, 2157 flow [2024-06-14 12:04:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:04:09,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:09,699 INFO L175 Difference]: Start difference. First operand has 171 places, 200 transitions, 1702 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:04:09,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 219 transitions, 2157 flow [2024-06-14 12:04:09,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 219 transitions, 2087 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:09,936 INFO L231 Difference]: Finished difference. Result has 173 places, 204 transitions, 1723 flow [2024-06-14 12:04:09,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1723, PETRI_PLACES=173, PETRI_TRANSITIONS=204} [2024-06-14 12:04:09,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-14 12:04:09,937 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 204 transitions, 1723 flow [2024-06-14 12:04:09,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:09,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:09,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:09,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:04:09,937 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:09,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1258991026, now seen corresponding path program 2 times [2024-06-14 12:04:09,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:09,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288361041] [2024-06-14 12:04:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:09,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:10,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:10,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288361041] [2024-06-14 12:04:10,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288361041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:10,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:10,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:10,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57012600] [2024-06-14 12:04:10,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:10,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:10,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:10,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:10,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:11,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:04:11,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 204 transitions, 1723 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:04:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:11,632 INFO L124 PetriNetUnfolderBase]: 2045/3283 cut-off events. [2024-06-14 12:04:11,632 INFO L125 PetriNetUnfolderBase]: For 279558/279560 co-relation queries the response was YES. [2024-06-14 12:04:11,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27366 conditions, 3283 events. 2045/3283 cut-off events. For 279558/279560 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17834 event pairs, 538 based on Foata normal form. 5/3286 useless extension candidates. Maximal degree in co-relation 27289. Up to 2807 conditions per place. [2024-06-14 12:04:11,664 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 159 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-14 12:04:11,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 225 transitions, 2326 flow [2024-06-14 12:04:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 12:04:11,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 12:04:11,665 INFO L175 Difference]: Start difference. First operand has 173 places, 204 transitions, 1723 flow. Second operand 7 states and 142 transitions. [2024-06-14 12:04:11,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 225 transitions, 2326 flow [2024-06-14 12:04:11,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 225 transitions, 2263 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:11,881 INFO L231 Difference]: Finished difference. Result has 176 places, 211 transitions, 1841 flow [2024-06-14 12:04:11,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1841, PETRI_PLACES=176, PETRI_TRANSITIONS=211} [2024-06-14 12:04:11,882 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-14 12:04:11,882 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 211 transitions, 1841 flow [2024-06-14 12:04:11,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:11,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:11,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:04:11,882 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:11,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1258753876, now seen corresponding path program 3 times [2024-06-14 12:04:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:11,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569101828] [2024-06-14 12:04:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:12,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:12,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569101828] [2024-06-14 12:04:12,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569101828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:12,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:12,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:12,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023057309] [2024-06-14 12:04:12,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:12,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:12,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:12,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:13,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:04:13,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 211 transitions, 1841 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:13,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:13,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:04:13,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:13,624 INFO L124 PetriNetUnfolderBase]: 2033/3267 cut-off events. [2024-06-14 12:04:13,624 INFO L125 PetriNetUnfolderBase]: For 288348/288350 co-relation queries the response was YES. [2024-06-14 12:04:13,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27926 conditions, 3267 events. 2033/3267 cut-off events. For 288348/288350 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17749 event pairs, 536 based on Foata normal form. 6/3271 useless extension candidates. Maximal degree in co-relation 27847. Up to 2836 conditions per place. [2024-06-14 12:04:13,655 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 172 selfloop transitions, 20 changer transitions 0/227 dead transitions. [2024-06-14 12:04:13,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 227 transitions, 2331 flow [2024-06-14 12:04:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:04:13,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 12:04:13,656 INFO L175 Difference]: Start difference. First operand has 176 places, 211 transitions, 1841 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:04:13,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 227 transitions, 2331 flow [2024-06-14 12:04:13,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 227 transitions, 2267 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:13,854 INFO L231 Difference]: Finished difference. Result has 180 places, 215 transitions, 1891 flow [2024-06-14 12:04:13,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1891, PETRI_PLACES=180, PETRI_TRANSITIONS=215} [2024-06-14 12:04:13,855 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-14 12:04:13,855 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 215 transitions, 1891 flow [2024-06-14 12:04:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-14 12:04:13,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:13,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:04:13,855 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)] === [2024-06-14 12:04:13,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash 427672800, now seen corresponding path program 1 times [2024-06-14 12:04:13,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:13,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787620679] [2024-06-14 12:04:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:13,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787620679] [2024-06-14 12:04:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787620679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966400302] [2024-06-14 12:04:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:15,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:15,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 215 transitions, 1891 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:15,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:15,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:15,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:16,131 INFO L124 PetriNetUnfolderBase]: 2454/3803 cut-off events. [2024-06-14 12:04:16,131 INFO L125 PetriNetUnfolderBase]: For 343691/343691 co-relation queries the response was YES. [2024-06-14 12:04:16,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33095 conditions, 3803 events. 2454/3803 cut-off events. For 343691/343691 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20103 event pairs, 508 based on Foata normal form. 16/3817 useless extension candidates. Maximal degree in co-relation 33014. Up to 3311 conditions per place. [2024-06-14 12:04:16,167 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 245 selfloop transitions, 25 changer transitions 0/275 dead transitions. [2024-06-14 12:04:16,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 275 transitions, 2925 flow [2024-06-14 12:04:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 12:04:16,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-14 12:04:16,169 INFO L175 Difference]: Start difference. First operand has 180 places, 215 transitions, 1891 flow. Second operand 11 states and 221 transitions. [2024-06-14 12:04:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 275 transitions, 2925 flow [2024-06-14 12:04:16,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 275 transitions, 2858 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:16,369 INFO L231 Difference]: Finished difference. Result has 186 places, 217 transitions, 1978 flow [2024-06-14 12:04:16,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1978, PETRI_PLACES=186, PETRI_TRANSITIONS=217} [2024-06-14 12:04:16,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 12:04:16,369 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 217 transitions, 1978 flow [2024-06-14 12:04:16,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:16,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:16,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:16,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:04:16,370 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)] === [2024-06-14 12:04:16,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1828671140, now seen corresponding path program 2 times [2024-06-14 12:04:16,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:16,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326771223] [2024-06-14 12:04:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:16,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:17,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:17,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326771223] [2024-06-14 12:04:17,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326771223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:17,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:17,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121640104] [2024-06-14 12:04:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:17,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:17,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:17,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 217 transitions, 1978 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:17,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:17,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:17,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:18,581 INFO L124 PetriNetUnfolderBase]: 2418/3743 cut-off events. [2024-06-14 12:04:18,581 INFO L125 PetriNetUnfolderBase]: For 337284/337284 co-relation queries the response was YES. [2024-06-14 12:04:18,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32074 conditions, 3743 events. 2418/3743 cut-off events. For 337284/337284 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19666 event pairs, 612 based on Foata normal form. 20/3761 useless extension candidates. Maximal degree in co-relation 31992. Up to 3423 conditions per place. [2024-06-14 12:04:18,617 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 238 selfloop transitions, 22 changer transitions 0/265 dead transitions. [2024-06-14 12:04:18,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 2672 flow [2024-06-14 12:04:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:04:18,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:04:18,618 INFO L175 Difference]: Start difference. First operand has 186 places, 217 transitions, 1978 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:04:18,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 2672 flow [2024-06-14 12:04:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 265 transitions, 2580 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:18,931 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 1937 flow [2024-06-14 12:04:18,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1937, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-14 12:04:18,932 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-14 12:04:18,932 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 1937 flow [2024-06-14 12:04:18,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:18,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:18,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:04:18,932 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)] === [2024-06-14 12:04:18,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1372128392, now seen corresponding path program 3 times [2024-06-14 12:04:18,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:18,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549753485] [2024-06-14 12:04:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:18,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:19,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549753485] [2024-06-14 12:04:19,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549753485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:19,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:19,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423429048] [2024-06-14 12:04:19,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:19,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:19,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:20,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:20,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 1937 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:20,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:20,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:20,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:21,184 INFO L124 PetriNetUnfolderBase]: 2493/3876 cut-off events. [2024-06-14 12:04:21,185 INFO L125 PetriNetUnfolderBase]: For 352598/352600 co-relation queries the response was YES. [2024-06-14 12:04:21,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32763 conditions, 3876 events. 2493/3876 cut-off events. For 352598/352600 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20708 event pairs, 572 based on Foata normal form. 20/3893 useless extension candidates. Maximal degree in co-relation 32679. Up to 3210 conditions per place. [2024-06-14 12:04:21,223 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 179 selfloop transitions, 81 changer transitions 0/265 dead transitions. [2024-06-14 12:04:21,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 265 transitions, 2691 flow [2024-06-14 12:04:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:04:21,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-14 12:04:21,225 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 1937 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:04:21,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 265 transitions, 2691 flow [2024-06-14 12:04:21,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 265 transitions, 2642 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 12:04:21,452 INFO L231 Difference]: Finished difference. Result has 190 places, 218 transitions, 2109 flow [2024-06-14 12:04:21,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2109, PETRI_PLACES=190, PETRI_TRANSITIONS=218} [2024-06-14 12:04:21,453 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-14 12:04:21,453 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 218 transitions, 2109 flow [2024-06-14 12:04:21,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:21,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:21,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:21,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:04:21,453 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)] === [2024-06-14 12:04:21,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1372313090, now seen corresponding path program 1 times [2024-06-14 12:04:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684806411] [2024-06-14 12:04:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:22,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:22,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684806411] [2024-06-14 12:04:22,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684806411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:22,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:22,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:22,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560082757] [2024-06-14 12:04:22,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:22,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:22,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:22,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:22,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 218 transitions, 2109 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:22,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:22,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:22,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:23,718 INFO L124 PetriNetUnfolderBase]: 2510/3898 cut-off events. [2024-06-14 12:04:23,719 INFO L125 PetriNetUnfolderBase]: For 351389/351391 co-relation queries the response was YES. [2024-06-14 12:04:23,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33440 conditions, 3898 events. 2510/3898 cut-off events. For 351389/351391 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20856 event pairs, 582 based on Foata normal form. 4/3899 useless extension candidates. Maximal degree in co-relation 33355. Up to 3464 conditions per place. [2024-06-14 12:04:23,753 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 71 changer transitions 0/264 dead transitions. [2024-06-14 12:04:23,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 264 transitions, 2830 flow [2024-06-14 12:04:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 12:04:23,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:23,754 INFO L175 Difference]: Start difference. First operand has 190 places, 218 transitions, 2109 flow. Second operand 10 states and 200 transitions. [2024-06-14 12:04:23,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 264 transitions, 2830 flow [2024-06-14 12:04:24,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 264 transitions, 2633 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:24,073 INFO L231 Difference]: Finished difference. Result has 193 places, 223 transitions, 2154 flow [2024-06-14 12:04:24,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2154, PETRI_PLACES=193, PETRI_TRANSITIONS=223} [2024-06-14 12:04:24,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-14 12:04:24,073 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 223 transitions, 2154 flow [2024-06-14 12:04:24,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:24,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:24,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:24,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:04:24,074 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:24,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash 598493340, now seen corresponding path program 4 times [2024-06-14 12:04:24,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:24,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385231408] [2024-06-14 12:04:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:24,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385231408] [2024-06-14 12:04:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385231408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:25,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:25,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:25,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764735139] [2024-06-14 12:04:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:25,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:25,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:25,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 223 transitions, 2154 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:25,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:25,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:25,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:26,371 INFO L124 PetriNetUnfolderBase]: 2585/4033 cut-off events. [2024-06-14 12:04:26,371 INFO L125 PetriNetUnfolderBase]: For 382734/382736 co-relation queries the response was YES. [2024-06-14 12:04:26,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34626 conditions, 4033 events. 2585/4033 cut-off events. For 382734/382736 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21920 event pairs, 576 based on Foata normal form. 20/4050 useless extension candidates. Maximal degree in co-relation 34539. Up to 3362 conditions per place. [2024-06-14 12:04:26,410 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 191 selfloop transitions, 74 changer transitions 0/270 dead transitions. [2024-06-14 12:04:26,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 270 transitions, 2936 flow [2024-06-14 12:04:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 12:04:26,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 12:04:26,411 INFO L175 Difference]: Start difference. First operand has 193 places, 223 transitions, 2154 flow. Second operand 10 states and 205 transitions. [2024-06-14 12:04:26,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 270 transitions, 2936 flow [2024-06-14 12:04:26,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 270 transitions, 2739 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:26,684 INFO L231 Difference]: Finished difference. Result has 196 places, 224 transitions, 2168 flow [2024-06-14 12:04:26,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2168, PETRI_PLACES=196, PETRI_TRANSITIONS=224} [2024-06-14 12:04:26,684 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-14 12:04:26,684 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 224 transitions, 2168 flow [2024-06-14 12:04:26,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:26,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:26,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:26,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:04:26,685 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:26,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash 212688966, now seen corresponding path program 2 times [2024-06-14 12:04:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:26,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030236016] [2024-06-14 12:04:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:26,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030236016] [2024-06-14 12:04:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030236016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150312081] [2024-06-14 12:04:27,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:27,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:27,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 224 transitions, 2168 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:27,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:27,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:27,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:28,936 INFO L124 PetriNetUnfolderBase]: 2613/4086 cut-off events. [2024-06-14 12:04:28,936 INFO L125 PetriNetUnfolderBase]: For 380281/380283 co-relation queries the response was YES. [2024-06-14 12:04:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35100 conditions, 4086 events. 2613/4086 cut-off events. For 380281/380283 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22389 event pairs, 609 based on Foata normal form. 4/4087 useless extension candidates. Maximal degree in co-relation 35012. Up to 3628 conditions per place. [2024-06-14 12:04:28,978 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 198 selfloop transitions, 66 changer transitions 0/269 dead transitions. [2024-06-14 12:04:28,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 269 transitions, 2911 flow [2024-06-14 12:04:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:04:28,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:04:28,979 INFO L175 Difference]: Start difference. First operand has 196 places, 224 transitions, 2168 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:04:28,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 269 transitions, 2911 flow [2024-06-14 12:04:29,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 269 transitions, 2722 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:29,249 INFO L231 Difference]: Finished difference. Result has 199 places, 230 transitions, 2229 flow [2024-06-14 12:04:29,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2229, PETRI_PLACES=199, PETRI_TRANSITIONS=230} [2024-06-14 12:04:29,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-14 12:04:29,249 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 230 transitions, 2229 flow [2024-06-14 12:04:29,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:29,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:29,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:04:29,250 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:29,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1538272878, now seen corresponding path program 3 times [2024-06-14 12:04:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654671679] [2024-06-14 12:04:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:30,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:30,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654671679] [2024-06-14 12:04:30,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654671679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:30,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230735459] [2024-06-14 12:04:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:30,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:30,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:30,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:30,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 230 transitions, 2229 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:30,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:30,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:30,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:31,495 INFO L124 PetriNetUnfolderBase]: 2630/4123 cut-off events. [2024-06-14 12:04:31,495 INFO L125 PetriNetUnfolderBase]: For 389739/389741 co-relation queries the response was YES. [2024-06-14 12:04:31,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35483 conditions, 4123 events. 2630/4123 cut-off events. For 389739/389741 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22720 event pairs, 624 based on Foata normal form. 4/4124 useless extension candidates. Maximal degree in co-relation 35393. Up to 3655 conditions per place. [2024-06-14 12:04:31,536 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 199 selfloop transitions, 69 changer transitions 0/273 dead transitions. [2024-06-14 12:04:31,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 273 transitions, 2968 flow [2024-06-14 12:04:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:04:31,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:04:31,537 INFO L175 Difference]: Start difference. First operand has 199 places, 230 transitions, 2229 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:04:31,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 273 transitions, 2968 flow [2024-06-14 12:04:31,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 273 transitions, 2769 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:31,800 INFO L231 Difference]: Finished difference. Result has 202 places, 234 transitions, 2264 flow [2024-06-14 12:04:31,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2264, PETRI_PLACES=202, PETRI_TRANSITIONS=234} [2024-06-14 12:04:31,801 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-14 12:04:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 234 transitions, 2264 flow [2024-06-14 12:04:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:31,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:31,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:31,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:04:31,802 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1544447344, now seen corresponding path program 4 times [2024-06-14 12:04:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65845831] [2024-06-14 12:04:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:32,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:32,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65845831] [2024-06-14 12:04:32,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65845831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:32,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:32,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411794104] [2024-06-14 12:04:32,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:32,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:32,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:33,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:33,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 234 transitions, 2264 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:34,091 INFO L124 PetriNetUnfolderBase]: 2647/4125 cut-off events. [2024-06-14 12:04:34,159 INFO L125 PetriNetUnfolderBase]: For 403985/403987 co-relation queries the response was YES. [2024-06-14 12:04:34,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35913 conditions, 4125 events. 2647/4125 cut-off events. For 403985/403987 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22539 event pairs, 590 based on Foata normal form. 4/4126 useless extension candidates. Maximal degree in co-relation 35822. Up to 3605 conditions per place. [2024-06-14 12:04:34,196 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 195 selfloop transitions, 76 changer transitions 0/276 dead transitions. [2024-06-14 12:04:34,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 276 transitions, 2996 flow [2024-06-14 12:04:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:04:34,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:04:34,197 INFO L175 Difference]: Start difference. First operand has 202 places, 234 transitions, 2264 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:04:34,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 276 transitions, 2996 flow [2024-06-14 12:04:34,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 276 transitions, 2813 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:34,429 INFO L231 Difference]: Finished difference. Result has 206 places, 236 transitions, 2314 flow [2024-06-14 12:04:34,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2314, PETRI_PLACES=206, PETRI_TRANSITIONS=236} [2024-06-14 12:04:34,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 12:04:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 236 transitions, 2314 flow [2024-06-14 12:04:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:34,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:34,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:04:34,430 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:34,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 604326751, now seen corresponding path program 1 times [2024-06-14 12:04:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327492682] [2024-06-14 12:04:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:35,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:35,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327492682] [2024-06-14 12:04:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327492682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:35,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:35,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791083483] [2024-06-14 12:04:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:35,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:35,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 236 transitions, 2314 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:35,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:35,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:35,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:36,275 INFO L124 PetriNetUnfolderBase]: 2523/4022 cut-off events. [2024-06-14 12:04:36,276 INFO L125 PetriNetUnfolderBase]: For 419267/419269 co-relation queries the response was YES. [2024-06-14 12:04:36,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35660 conditions, 4022 events. 2523/4022 cut-off events. For 419267/419269 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22714 event pairs, 614 based on Foata normal form. 4/4010 useless extension candidates. Maximal degree in co-relation 35568. Up to 3705 conditions per place. [2024-06-14 12:04:36,315 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 229 selfloop transitions, 20 changer transitions 0/267 dead transitions. [2024-06-14 12:04:36,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 267 transitions, 2950 flow [2024-06-14 12:04:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:04:36,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 12:04:36,316 INFO L175 Difference]: Start difference. First operand has 206 places, 236 transitions, 2314 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:04:36,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 267 transitions, 2950 flow [2024-06-14 12:04:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 267 transitions, 2735 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:36,544 INFO L231 Difference]: Finished difference. Result has 206 places, 239 transitions, 2210 flow [2024-06-14 12:04:36,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=206, PETRI_TRANSITIONS=239} [2024-06-14 12:04:36,545 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 12:04:36,545 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 239 transitions, 2210 flow [2024-06-14 12:04:36,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:36,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:36,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:36,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:04:36,546 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:36,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash 604655444, now seen corresponding path program 1 times [2024-06-14 12:04:36,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:36,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080610627] [2024-06-14 12:04:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080610627] [2024-06-14 12:04:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080610627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874560375] [2024-06-14 12:04:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:37,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:37,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:37,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:37,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 239 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:37,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:37,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:37,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:38,567 INFO L124 PetriNetUnfolderBase]: 2524/4015 cut-off events. [2024-06-14 12:04:38,568 INFO L125 PetriNetUnfolderBase]: For 427051/427051 co-relation queries the response was YES. [2024-06-14 12:04:38,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35887 conditions, 4015 events. 2524/4015 cut-off events. For 427051/427051 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22556 event pairs, 603 based on Foata normal form. 1/3998 useless extension candidates. Maximal degree in co-relation 35794. Up to 3723 conditions per place. [2024-06-14 12:04:38,610 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 228 selfloop transitions, 18 changer transitions 0/264 dead transitions. [2024-06-14 12:04:38,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 264 transitions, 2830 flow [2024-06-14 12:04:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:04:38,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:04:38,611 INFO L175 Difference]: Start difference. First operand has 206 places, 239 transitions, 2210 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:04:38,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 264 transitions, 2830 flow [2024-06-14 12:04:38,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 264 transitions, 2743 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:38,936 INFO L231 Difference]: Finished difference. Result has 208 places, 242 transitions, 2237 flow [2024-06-14 12:04:38,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2237, PETRI_PLACES=208, PETRI_TRANSITIONS=242} [2024-06-14 12:04:38,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-14 12:04:38,936 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 242 transitions, 2237 flow [2024-06-14 12:04:38,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:38,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:38,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:38,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:04:38,937 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:38,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash 604655041, now seen corresponding path program 2 times [2024-06-14 12:04:38,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:38,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048514028] [2024-06-14 12:04:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:38,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048514028] [2024-06-14 12:04:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048514028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21707461] [2024-06-14 12:04:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:39,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:39,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 242 transitions, 2237 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:39,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:39,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:40,730 INFO L124 PetriNetUnfolderBase]: 2529/4026 cut-off events. [2024-06-14 12:04:40,730 INFO L125 PetriNetUnfolderBase]: For 442459/442459 co-relation queries the response was YES. [2024-06-14 12:04:40,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36377 conditions, 4026 events. 2529/4026 cut-off events. For 442459/442459 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22686 event pairs, 603 based on Foata normal form. 2/4010 useless extension candidates. Maximal degree in co-relation 36283. Up to 3709 conditions per place. [2024-06-14 12:04:40,771 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 226 selfloop transitions, 24 changer transitions 0/268 dead transitions. [2024-06-14 12:04:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 2869 flow [2024-06-14 12:04:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:04:40,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 12:04:40,772 INFO L175 Difference]: Start difference. First operand has 208 places, 242 transitions, 2237 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:04:40,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 2869 flow [2024-06-14 12:04:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 268 transitions, 2777 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:41,112 INFO L231 Difference]: Finished difference. Result has 210 places, 245 transitions, 2271 flow [2024-06-14 12:04:41,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2271, PETRI_PLACES=210, PETRI_TRANSITIONS=245} [2024-06-14 12:04:41,112 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 12:04:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 245 transitions, 2271 flow [2024-06-14 12:04:41,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:41,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:41,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:04:41,113 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:41,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:41,113 INFO L85 PathProgramCache]: Analyzing trace with hash 930976983, now seen corresponding path program 1 times [2024-06-14 12:04:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:41,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985520001] [2024-06-14 12:04:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:41,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985520001] [2024-06-14 12:04:41,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985520001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:41,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:41,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:41,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457266323] [2024-06-14 12:04:41,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:41,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:41,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 245 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:41,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:41,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:41,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:42,732 INFO L124 PetriNetUnfolderBase]: 2576/4075 cut-off events. [2024-06-14 12:04:42,732 INFO L125 PetriNetUnfolderBase]: For 449411/449413 co-relation queries the response was YES. [2024-06-14 12:04:42,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36778 conditions, 4075 events. 2576/4075 cut-off events. For 449411/449413 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22758 event pairs, 611 based on Foata normal form. 4/4070 useless extension candidates. Maximal degree in co-relation 36683. Up to 3707 conditions per place. [2024-06-14 12:04:42,772 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 218 selfloop transitions, 19 changer transitions 0/268 dead transitions. [2024-06-14 12:04:42,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 268 transitions, 2881 flow [2024-06-14 12:04:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:04:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:42,773 INFO L175 Difference]: Start difference. First operand has 210 places, 245 transitions, 2271 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:04:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 268 transitions, 2881 flow [2024-06-14 12:04:43,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 268 transitions, 2777 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:43,158 INFO L231 Difference]: Finished difference. Result has 211 places, 248 transitions, 2285 flow [2024-06-14 12:04:43,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2285, PETRI_PLACES=211, PETRI_TRANSITIONS=248} [2024-06-14 12:04:43,159 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-14 12:04:43,159 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 248 transitions, 2285 flow [2024-06-14 12:04:43,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:43,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:43,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:43,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:04:43,159 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:43,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -294256075, now seen corresponding path program 2 times [2024-06-14 12:04:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674319764] [2024-06-14 12:04:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:43,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:43,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674319764] [2024-06-14 12:04:43,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674319764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:43,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:43,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:43,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517883531] [2024-06-14 12:04:43,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:44,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:44,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 248 transitions, 2285 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:44,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:44,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:44,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:44,826 INFO L124 PetriNetUnfolderBase]: 2602/4115 cut-off events. [2024-06-14 12:04:44,826 INFO L125 PetriNetUnfolderBase]: For 468034/468036 co-relation queries the response was YES. [2024-06-14 12:04:44,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37740 conditions, 4115 events. 2602/4115 cut-off events. For 468034/468036 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23018 event pairs, 612 based on Foata normal form. 4/4110 useless extension candidates. Maximal degree in co-relation 37644. Up to 3725 conditions per place. [2024-06-14 12:04:44,867 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 215 selfloop transitions, 27 changer transitions 0/273 dead transitions. [2024-06-14 12:04:44,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 273 transitions, 3119 flow [2024-06-14 12:04:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:04:44,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:44,868 INFO L175 Difference]: Start difference. First operand has 211 places, 248 transitions, 2285 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:04:44,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 273 transitions, 3119 flow [2024-06-14 12:04:45,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 273 transitions, 3035 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:04:45,152 INFO L231 Difference]: Finished difference. Result has 214 places, 254 transitions, 2415 flow [2024-06-14 12:04:45,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2415, PETRI_PLACES=214, PETRI_TRANSITIONS=254} [2024-06-14 12:04:45,152 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-14 12:04:45,152 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 254 transitions, 2415 flow [2024-06-14 12:04:45,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:45,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:45,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:45,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:04:45,153 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:45,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -203172728, now seen corresponding path program 5 times [2024-06-14 12:04:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568198234] [2024-06-14 12:04:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:45,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:46,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568198234] [2024-06-14 12:04:46,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568198234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:46,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:46,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:46,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812239799] [2024-06-14 12:04:46,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:46,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:46,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:46,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:46,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 254 transitions, 2415 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:46,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:46,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:46,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:47,563 INFO L124 PetriNetUnfolderBase]: 2783/4350 cut-off events. [2024-06-14 12:04:47,563 INFO L125 PetriNetUnfolderBase]: For 523415/523417 co-relation queries the response was YES. [2024-06-14 12:04:47,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40401 conditions, 4350 events. 2783/4350 cut-off events. For 523415/523417 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24108 event pairs, 584 based on Foata normal form. 20/4367 useless extension candidates. Maximal degree in co-relation 40304. Up to 3660 conditions per place. [2024-06-14 12:04:47,608 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 218 selfloop transitions, 75 changer transitions 0/298 dead transitions. [2024-06-14 12:04:47,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 298 transitions, 3268 flow [2024-06-14 12:04:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 12:04:47,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 12:04:47,609 INFO L175 Difference]: Start difference. First operand has 214 places, 254 transitions, 2415 flow. Second operand 10 states and 203 transitions. [2024-06-14 12:04:47,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 298 transitions, 3268 flow [2024-06-14 12:04:47,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 298 transitions, 3174 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:47,968 INFO L231 Difference]: Finished difference. Result has 221 places, 255 transitions, 2542 flow [2024-06-14 12:04:47,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2542, PETRI_PLACES=221, PETRI_TRANSITIONS=255} [2024-06-14 12:04:47,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-14 12:04:47,969 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 255 transitions, 2542 flow [2024-06-14 12:04:47,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:47,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:47,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:47,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:04:47,970 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)] === [2024-06-14 12:04:47,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:47,970 INFO L85 PathProgramCache]: Analyzing trace with hash -202988030, now seen corresponding path program 5 times [2024-06-14 12:04:47,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:47,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489050589] [2024-06-14 12:04:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:47,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:49,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489050589] [2024-06-14 12:04:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489050589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:49,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:49,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198887247] [2024-06-14 12:04:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:49,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:49,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:49,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 255 transitions, 2542 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:49,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:49,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:49,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:50,416 INFO L124 PetriNetUnfolderBase]: 2811/4393 cut-off events. [2024-06-14 12:04:50,417 INFO L125 PetriNetUnfolderBase]: For 517056/517058 co-relation queries the response was YES. [2024-06-14 12:04:50,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41185 conditions, 4393 events. 2811/4393 cut-off events. For 517056/517058 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24382 event pairs, 617 based on Foata normal form. 4/4394 useless extension candidates. Maximal degree in co-relation 41086. Up to 3931 conditions per place. [2024-06-14 12:04:50,461 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 223 selfloop transitions, 69 changer transitions 0/297 dead transitions. [2024-06-14 12:04:50,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 297 transitions, 3348 flow [2024-06-14 12:04:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:04:50,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 12:04:50,463 INFO L175 Difference]: Start difference. First operand has 221 places, 255 transitions, 2542 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:04:50,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 297 transitions, 3348 flow [2024-06-14 12:04:50,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 297 transitions, 3149 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:50,936 INFO L231 Difference]: Finished difference. Result has 224 places, 261 transitions, 2616 flow [2024-06-14 12:04:50,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2616, PETRI_PLACES=224, PETRI_TRANSITIONS=261} [2024-06-14 12:04:50,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-14 12:04:50,937 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 261 transitions, 2616 flow [2024-06-14 12:04:50,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:50,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:50,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:50,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:04:50,937 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)] === [2024-06-14 12:04:50,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:50,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1205794848, now seen corresponding path program 6 times [2024-06-14 12:04:50,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:50,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902144640] [2024-06-14 12:04:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:50,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902144640] [2024-06-14 12:04:52,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902144640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:52,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:52,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682976925] [2024-06-14 12:04:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:52,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:52,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:52,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:52,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 261 transitions, 2616 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:52,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:52,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:52,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:53,405 INFO L124 PetriNetUnfolderBase]: 2864/4495 cut-off events. [2024-06-14 12:04:53,405 INFO L125 PetriNetUnfolderBase]: For 536475/536477 co-relation queries the response was YES. [2024-06-14 12:04:53,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42241 conditions, 4495 events. 2864/4495 cut-off events. For 536475/536477 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25293 event pairs, 634 based on Foata normal form. 4/4496 useless extension candidates. Maximal degree in co-relation 42140. Up to 3962 conditions per place. [2024-06-14 12:04:53,458 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 225 selfloop transitions, 79 changer transitions 0/309 dead transitions. [2024-06-14 12:04:53,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 309 transitions, 3768 flow [2024-06-14 12:04:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 12:04:53,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:04:53,459 INFO L175 Difference]: Start difference. First operand has 224 places, 261 transitions, 2616 flow. Second operand 10 states and 200 transitions. [2024-06-14 12:04:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 309 transitions, 3768 flow [2024-06-14 12:04:53,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 3541 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:53,857 INFO L231 Difference]: Finished difference. Result has 227 places, 270 transitions, 2765 flow [2024-06-14 12:04:53,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2765, PETRI_PLACES=227, PETRI_TRANSITIONS=270} [2024-06-14 12:04:53,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 12:04:53,857 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 270 transitions, 2765 flow [2024-06-14 12:04:53,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:53,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:53,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:53,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:04:53,858 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)] === [2024-06-14 12:04:53,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1427678898, now seen corresponding path program 7 times [2024-06-14 12:04:53,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:53,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904232336] [2024-06-14 12:04:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:53,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:54,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:54,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904232336] [2024-06-14 12:04:54,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904232336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:54,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:54,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:54,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075359925] [2024-06-14 12:04:54,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:54,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:54,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:55,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:55,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 270 transitions, 2765 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:55,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:55,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:55,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:56,220 INFO L124 PetriNetUnfolderBase]: 2881/4512 cut-off events. [2024-06-14 12:04:56,220 INFO L125 PetriNetUnfolderBase]: For 552827/552829 co-relation queries the response was YES. [2024-06-14 12:04:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42725 conditions, 4512 events. 2881/4512 cut-off events. For 552827/552829 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25291 event pairs, 634 based on Foata normal form. 4/4513 useless extension candidates. Maximal degree in co-relation 42623. Up to 4036 conditions per place. [2024-06-14 12:04:56,274 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 230 selfloop transitions, 73 changer transitions 0/308 dead transitions. [2024-06-14 12:04:56,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 308 transitions, 3564 flow [2024-06-14 12:04:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:04:56,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:04:56,275 INFO L175 Difference]: Start difference. First operand has 227 places, 270 transitions, 2765 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:04:56,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 308 transitions, 3564 flow [2024-06-14 12:04:56,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 308 transitions, 3437 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:56,708 INFO L231 Difference]: Finished difference. Result has 234 places, 272 transitions, 2879 flow [2024-06-14 12:04:56,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2879, PETRI_PLACES=234, PETRI_TRANSITIONS=272} [2024-06-14 12:04:56,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 12:04:56,708 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 272 transitions, 2879 flow [2024-06-14 12:04:56,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:56,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:56,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:04:56,709 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)] === [2024-06-14 12:04:56,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1972639724, now seen corresponding path program 8 times [2024-06-14 12:04:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785916235] [2024-06-14 12:04:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:57,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:57,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785916235] [2024-06-14 12:04:57,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785916235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:57,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:57,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514300973] [2024-06-14 12:04:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:57,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:57,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 272 transitions, 2879 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:57,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:57,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:57,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:59,025 INFO L124 PetriNetUnfolderBase]: 2898/4549 cut-off events. [2024-06-14 12:04:59,026 INFO L125 PetriNetUnfolderBase]: For 569244/569246 co-relation queries the response was YES. [2024-06-14 12:04:59,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43419 conditions, 4549 events. 2898/4549 cut-off events. For 569244/569246 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25649 event pairs, 644 based on Foata normal form. 4/4550 useless extension candidates. Maximal degree in co-relation 43315. Up to 4004 conditions per place. [2024-06-14 12:04:59,077 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 228 selfloop transitions, 78 changer transitions 0/311 dead transitions. [2024-06-14 12:04:59,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 311 transitions, 3690 flow [2024-06-14 12:04:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:04:59,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:04:59,079 INFO L175 Difference]: Start difference. First operand has 234 places, 272 transitions, 2879 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:04:59,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 311 transitions, 3690 flow [2024-06-14 12:04:59,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 311 transitions, 3455 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:59,537 INFO L231 Difference]: Finished difference. Result has 237 places, 274 transitions, 2899 flow [2024-06-14 12:04:59,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2899, PETRI_PLACES=237, PETRI_TRANSITIONS=274} [2024-06-14 12:04:59,538 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 12:04:59,538 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 274 transitions, 2899 flow [2024-06-14 12:04:59,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:59,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:59,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:04:59,538 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)] === [2024-06-14 12:04:59,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 24913120, now seen corresponding path program 9 times [2024-06-14 12:04:59,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:59,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312588735] [2024-06-14 12:04:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:00,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:00,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312588735] [2024-06-14 12:05:00,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312588735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:00,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:00,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:00,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806683494] [2024-06-14 12:05:00,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:00,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:00,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:00,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:00,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 274 transitions, 2899 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:00,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:00,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:00,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:02,136 INFO L124 PetriNetUnfolderBase]: 2890/4517 cut-off events. [2024-06-14 12:05:02,136 INFO L125 PetriNetUnfolderBase]: For 576392/576394 co-relation queries the response was YES. [2024-06-14 12:05:02,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43279 conditions, 4517 events. 2890/4517 cut-off events. For 576392/576394 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25193 event pairs, 627 based on Foata normal form. 4/4518 useless extension candidates. Maximal degree in co-relation 43174. Up to 4051 conditions per place. [2024-06-14 12:05:02,187 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 229 selfloop transitions, 76 changer transitions 0/310 dead transitions. [2024-06-14 12:05:02,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 310 transitions, 3618 flow [2024-06-14 12:05:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:05:02,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 12:05:02,189 INFO L175 Difference]: Start difference. First operand has 237 places, 274 transitions, 2899 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:05:02,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 310 transitions, 3618 flow [2024-06-14 12:05:02,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 310 transitions, 3325 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:02,691 INFO L231 Difference]: Finished difference. Result has 239 places, 274 transitions, 2765 flow [2024-06-14 12:05:02,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2765, PETRI_PLACES=239, PETRI_TRANSITIONS=274} [2024-06-14 12:05:02,691 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-14 12:05:02,691 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 274 transitions, 2765 flow [2024-06-14 12:05:02,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:02,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:02,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:02,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:05:02,692 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)] === [2024-06-14 12:05:02,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1245739444, now seen corresponding path program 10 times [2024-06-14 12:05:02,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:02,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862907142] [2024-06-14 12:05:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:02,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:03,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862907142] [2024-06-14 12:05:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862907142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:03,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:03,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856561660] [2024-06-14 12:05:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:03,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:03,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:03,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 274 transitions, 2765 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:03,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:03,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:03,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:05,027 INFO L124 PetriNetUnfolderBase]: 2907/4549 cut-off events. [2024-06-14 12:05:05,027 INFO L125 PetriNetUnfolderBase]: For 591491/591493 co-relation queries the response was YES. [2024-06-14 12:05:05,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43443 conditions, 4549 events. 2907/4549 cut-off events. For 591491/591493 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25504 event pairs, 616 based on Foata normal form. 4/4550 useless extension candidates. Maximal degree in co-relation 43337. Up to 3801 conditions per place. [2024-06-14 12:05:05,082 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 210 selfloop transitions, 99 changer transitions 0/314 dead transitions. [2024-06-14 12:05:05,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 314 transitions, 3588 flow [2024-06-14 12:05:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:05:05,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:05:05,083 INFO L175 Difference]: Start difference. First operand has 239 places, 274 transitions, 2765 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:05:05,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 314 transitions, 3588 flow [2024-06-14 12:05:05,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 314 transitions, 3427 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 12:05:05,554 INFO L231 Difference]: Finished difference. Result has 240 places, 276 transitions, 2905 flow [2024-06-14 12:05:05,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2905, PETRI_PLACES=240, PETRI_TRANSITIONS=276} [2024-06-14 12:05:05,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-14 12:05:05,554 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 276 transitions, 2905 flow [2024-06-14 12:05:05,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:05,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:05,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:05:05,555 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:05,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:05,555 INFO L85 PathProgramCache]: Analyzing trace with hash 115269313, now seen corresponding path program 3 times [2024-06-14 12:05:05,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:05,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845083399] [2024-06-14 12:05:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:05,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:06,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:06,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845083399] [2024-06-14 12:05:06,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845083399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:06,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:06,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704416071] [2024-06-14 12:05:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:06,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:06,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:06,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:06,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 276 transitions, 2905 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:06,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:06,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:06,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:07,373 INFO L124 PetriNetUnfolderBase]: 2763/4416 cut-off events. [2024-06-14 12:05:07,373 INFO L125 PetriNetUnfolderBase]: For 607850/607850 co-relation queries the response was YES. [2024-06-14 12:05:07,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42991 conditions, 4416 events. 2763/4416 cut-off events. For 607850/607850 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 25542 event pairs, 624 based on Foata normal form. 2/4407 useless extension candidates. Maximal degree in co-relation 42884. Up to 4015 conditions per place. [2024-06-14 12:05:07,426 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 238 selfloop transitions, 31 changer transitions 0/296 dead transitions. [2024-06-14 12:05:07,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3566 flow [2024-06-14 12:05:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:05:07,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:05:07,427 INFO L175 Difference]: Start difference. First operand has 240 places, 276 transitions, 2905 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:05:07,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3566 flow [2024-06-14 12:05:07,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 296 transitions, 3283 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:07,831 INFO L231 Difference]: Finished difference. Result has 240 places, 279 transitions, 2772 flow [2024-06-14 12:05:07,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2772, PETRI_PLACES=240, PETRI_TRANSITIONS=279} [2024-06-14 12:05:07,831 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-14 12:05:07,832 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 279 transitions, 2772 flow [2024-06-14 12:05:07,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:07,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:07,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:07,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:05:07,832 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:07,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 615754994, now seen corresponding path program 2 times [2024-06-14 12:05:07,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:07,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491788952] [2024-06-14 12:05:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491788952] [2024-06-14 12:05:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491788952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:08,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:08,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586450576] [2024-06-14 12:05:08,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:09,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:09,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 279 transitions, 2772 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:09,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:09,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:09,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:09,962 INFO L124 PetriNetUnfolderBase]: 2764/4409 cut-off events. [2024-06-14 12:05:09,962 INFO L125 PetriNetUnfolderBase]: For 619046/619046 co-relation queries the response was YES. [2024-06-14 12:05:09,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43063 conditions, 4409 events. 2764/4409 cut-off events. For 619046/619046 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25385 event pairs, 614 based on Foata normal form. 1/4399 useless extension candidates. Maximal degree in co-relation 42955. Up to 4042 conditions per place. [2024-06-14 12:05:10,108 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 248 selfloop transitions, 23 changer transitions 0/298 dead transitions. [2024-06-14 12:05:10,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 298 transitions, 3433 flow [2024-06-14 12:05:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:05:10,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:05:10,109 INFO L175 Difference]: Start difference. First operand has 240 places, 279 transitions, 2772 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:05:10,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 298 transitions, 3433 flow [2024-06-14 12:05:10,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 298 transitions, 3305 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:10,416 INFO L231 Difference]: Finished difference. Result has 242 places, 282 transitions, 2778 flow [2024-06-14 12:05:10,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2778, PETRI_PLACES=242, PETRI_TRANSITIONS=282} [2024-06-14 12:05:10,416 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 12:05:10,417 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 282 transitions, 2778 flow [2024-06-14 12:05:10,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:10,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:10,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:10,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:05:10,417 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:10,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 615768479, now seen corresponding path program 1 times [2024-06-14 12:05:10,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:10,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480793481] [2024-06-14 12:05:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:10,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480793481] [2024-06-14 12:05:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480793481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:11,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11370218] [2024-06-14 12:05:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:11,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:11,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:11,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:05:11,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 282 transitions, 2778 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:05:11,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:11,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:05:11,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:12,588 INFO L124 PetriNetUnfolderBase]: 2610/4242 cut-off events. [2024-06-14 12:05:12,588 INFO L125 PetriNetUnfolderBase]: For 629768/629768 co-relation queries the response was YES. [2024-06-14 12:05:12,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42329 conditions, 4242 events. 2610/4242 cut-off events. For 629768/629768 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25004 event pairs, 593 based on Foata normal form. 1/4226 useless extension candidates. Maximal degree in co-relation 42220. Up to 3728 conditions per place. [2024-06-14 12:05:12,645 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 231 selfloop transitions, 17 changer transitions 0/302 dead transitions. [2024-06-14 12:05:12,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 302 transitions, 3390 flow [2024-06-14 12:05:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:05:12,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:05:12,646 INFO L175 Difference]: Start difference. First operand has 242 places, 282 transitions, 2778 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:05:12,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 302 transitions, 3390 flow [2024-06-14 12:05:13,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 302 transitions, 3278 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:13,211 INFO L231 Difference]: Finished difference. Result has 244 places, 285 transitions, 2780 flow [2024-06-14 12:05:13,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=244, PETRI_TRANSITIONS=285} [2024-06-14 12:05:13,211 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-14 12:05:13,211 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 285 transitions, 2780 flow [2024-06-14 12:05:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:05:13,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:13,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:05:13,212 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:13,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 615768014, now seen corresponding path program 3 times [2024-06-14 12:05:13,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:13,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402849683] [2024-06-14 12:05:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:14,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402849683] [2024-06-14 12:05:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402849683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740436689] [2024-06-14 12:05:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:14,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:14,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:14,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 285 transitions, 2780 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:14,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:14,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:14,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:15,362 INFO L124 PetriNetUnfolderBase]: 2784/4433 cut-off events. [2024-06-14 12:05:15,362 INFO L125 PetriNetUnfolderBase]: For 643657/643657 co-relation queries the response was YES. [2024-06-14 12:05:15,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44198 conditions, 4433 events. 2784/4433 cut-off events. For 643657/643657 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25412 event pairs, 613 based on Foata normal form. 1/4423 useless extension candidates. Maximal degree in co-relation 44088. Up to 4047 conditions per place. [2024-06-14 12:05:15,416 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 246 selfloop transitions, 31 changer transitions 0/304 dead transitions. [2024-06-14 12:05:15,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 304 transitions, 3461 flow [2024-06-14 12:05:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:05:15,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:05:15,417 INFO L175 Difference]: Start difference. First operand has 244 places, 285 transitions, 2780 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:05:15,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 304 transitions, 3461 flow [2024-06-14 12:05:15,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 304 transitions, 3369 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:15,898 INFO L231 Difference]: Finished difference. Result has 246 places, 288 transitions, 2846 flow [2024-06-14 12:05:15,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=246, PETRI_TRANSITIONS=288} [2024-06-14 12:05:15,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-14 12:05:15,899 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 288 transitions, 2846 flow [2024-06-14 12:05:15,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:15,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:15,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:05:15,899 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:15,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash -658451809, now seen corresponding path program 3 times [2024-06-14 12:05:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:15,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293684925] [2024-06-14 12:05:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293684925] [2024-06-14 12:05:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293684925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:16,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660535264] [2024-06-14 12:05:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:16,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:16,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:16,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 288 transitions, 2846 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:16,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:16,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:16,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:17,672 INFO L124 PetriNetUnfolderBase]: 2792/4426 cut-off events. [2024-06-14 12:05:17,672 INFO L125 PetriNetUnfolderBase]: For 649071/649079 co-relation queries the response was YES. [2024-06-14 12:05:17,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44372 conditions, 4426 events. 2792/4426 cut-off events. For 649071/649079 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25137 event pairs, 604 based on Foata normal form. 8/4410 useless extension candidates. Maximal degree in co-relation 44261. Up to 4037 conditions per place. [2024-06-14 12:05:17,728 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 253 selfloop transitions, 19 changer transitions 0/305 dead transitions. [2024-06-14 12:05:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 305 transitions, 3449 flow [2024-06-14 12:05:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:05:17,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 12:05:17,729 INFO L175 Difference]: Start difference. First operand has 246 places, 288 transitions, 2846 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:05:17,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 305 transitions, 3449 flow [2024-06-14 12:05:18,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 305 transitions, 3273 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:18,249 INFO L231 Difference]: Finished difference. Result has 247 places, 288 transitions, 2714 flow [2024-06-14 12:05:18,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2714, PETRI_PLACES=247, PETRI_TRANSITIONS=288} [2024-06-14 12:05:18,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-14 12:05:18,250 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 288 transitions, 2714 flow [2024-06-14 12:05:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:18,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:18,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:18,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:05:18,251 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:18,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:18,251 INFO L85 PathProgramCache]: Analyzing trace with hash -645119329, now seen corresponding path program 4 times [2024-06-14 12:05:18,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:18,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987444391] [2024-06-14 12:05:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:18,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987444391] [2024-06-14 12:05:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987444391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:19,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:19,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126472403] [2024-06-14 12:05:19,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:19,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:19,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 288 transitions, 2714 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:19,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:19,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:19,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:20,026 INFO L124 PetriNetUnfolderBase]: 2798/4436 cut-off events. [2024-06-14 12:05:20,027 INFO L125 PetriNetUnfolderBase]: For 671450/671458 co-relation queries the response was YES. [2024-06-14 12:05:20,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44848 conditions, 4436 events. 2798/4436 cut-off events. For 671450/671458 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25246 event pairs, 604 based on Foata normal form. 8/4411 useless extension candidates. Maximal degree in co-relation 44736. Up to 4027 conditions per place. [2024-06-14 12:05:20,083 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 246 selfloop transitions, 27 changer transitions 0/306 dead transitions. [2024-06-14 12:05:20,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 306 transitions, 3411 flow [2024-06-14 12:05:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:05:20,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 12:05:20,084 INFO L175 Difference]: Start difference. First operand has 247 places, 288 transitions, 2714 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:05:20,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 306 transitions, 3411 flow [2024-06-14 12:05:20,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 306 transitions, 3331 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:20,596 INFO L231 Difference]: Finished difference. Result has 246 places, 291 transitions, 2784 flow [2024-06-14 12:05:20,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2784, PETRI_PLACES=246, PETRI_TRANSITIONS=291} [2024-06-14 12:05:20,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-14 12:05:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 291 transitions, 2784 flow [2024-06-14 12:05:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:20,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:05:20,598 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:20,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash 550990495, now seen corresponding path program 5 times [2024-06-14 12:05:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836897447] [2024-06-14 12:05:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:21,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836897447] [2024-06-14 12:05:21,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836897447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:21,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:21,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713315199] [2024-06-14 12:05:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:21,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:21,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:21,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:21,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 291 transitions, 2784 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:21,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:21,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:21,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:22,355 INFO L124 PetriNetUnfolderBase]: 2816/4465 cut-off events. [2024-06-14 12:05:22,356 INFO L125 PetriNetUnfolderBase]: For 693315/693325 co-relation queries the response was YES. [2024-06-14 12:05:22,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45815 conditions, 4465 events. 2816/4465 cut-off events. For 693315/693325 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25470 event pairs, 619 based on Foata normal form. 10/4442 useless extension candidates. Maximal degree in co-relation 45702. Up to 4014 conditions per place. [2024-06-14 12:05:22,411 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 234 selfloop transitions, 44 changer transitions 0/311 dead transitions. [2024-06-14 12:05:22,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 311 transitions, 3751 flow [2024-06-14 12:05:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:05:22,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 12:05:22,412 INFO L175 Difference]: Start difference. First operand has 246 places, 291 transitions, 2784 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:05:22,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 311 transitions, 3751 flow [2024-06-14 12:05:23,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 311 transitions, 3627 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:23,025 INFO L231 Difference]: Finished difference. Result has 248 places, 297 transitions, 2940 flow [2024-06-14 12:05:23,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2940, PETRI_PLACES=248, PETRI_TRANSITIONS=297} [2024-06-14 12:05:23,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-14 12:05:23,025 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 297 transitions, 2940 flow [2024-06-14 12:05:23,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:23,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:23,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:23,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:05:23,026 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:23,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash 359031675, now seen corresponding path program 6 times [2024-06-14 12:05:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:23,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430754864] [2024-06-14 12:05:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:23,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430754864] [2024-06-14 12:05:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430754864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:23,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:23,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527955301] [2024-06-14 12:05:23,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:23,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:24,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:24,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 297 transitions, 2940 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:24,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:24,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:24,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:24,867 INFO L124 PetriNetUnfolderBase]: 2810/4457 cut-off events. [2024-06-14 12:05:24,867 INFO L125 PetriNetUnfolderBase]: For 706551/706561 co-relation queries the response was YES. [2024-06-14 12:05:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46066 conditions, 4457 events. 2810/4457 cut-off events. For 706551/706561 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 25450 event pairs, 616 based on Foata normal form. 10/4434 useless extension candidates. Maximal degree in co-relation 45952. Up to 4009 conditions per place. [2024-06-14 12:05:24,924 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 233 selfloop transitions, 44 changer transitions 0/310 dead transitions. [2024-06-14 12:05:24,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 310 transitions, 3569 flow [2024-06-14 12:05:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:05:24,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 12:05:24,925 INFO L175 Difference]: Start difference. First operand has 248 places, 297 transitions, 2940 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:05:24,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 310 transitions, 3569 flow [2024-06-14 12:05:25,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 310 transitions, 3375 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:25,573 INFO L231 Difference]: Finished difference. Result has 252 places, 297 transitions, 2840 flow [2024-06-14 12:05:25,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2840, PETRI_PLACES=252, PETRI_TRANSITIONS=297} [2024-06-14 12:05:25,573 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-14 12:05:25,573 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 297 transitions, 2840 flow [2024-06-14 12:05:25,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:25,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:25,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:25,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:05:25,574 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)] === [2024-06-14 12:05:25,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:25,574 INFO L85 PathProgramCache]: Analyzing trace with hash -374485998, now seen corresponding path program 11 times [2024-06-14 12:05:25,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:25,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800817295] [2024-06-14 12:05:25,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:25,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:26,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:26,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800817295] [2024-06-14 12:05:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800817295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370818616] [2024-06-14 12:05:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:26,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:26,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:26,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 297 transitions, 2840 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:26,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:26,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:26,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:28,123 INFO L124 PetriNetUnfolderBase]: 3001/4692 cut-off events. [2024-06-14 12:05:28,123 INFO L125 PetriNetUnfolderBase]: For 730587/730595 co-relation queries the response was YES. [2024-06-14 12:05:28,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47716 conditions, 4692 events. 3001/4692 cut-off events. For 730587/730595 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26303 event pairs, 648 based on Foata normal form. 7/4696 useless extension candidates. Maximal degree in co-relation 47600. Up to 4167 conditions per place. [2024-06-14 12:05:28,186 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 250 selfloop transitions, 87 changer transitions 0/342 dead transitions. [2024-06-14 12:05:28,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 342 transitions, 4105 flow [2024-06-14 12:05:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:05:28,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 12:05:28,187 INFO L175 Difference]: Start difference. First operand has 252 places, 297 transitions, 2840 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:05:28,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 342 transitions, 4105 flow [2024-06-14 12:05:28,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 342 transitions, 3979 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:28,859 INFO L231 Difference]: Finished difference. Result has 256 places, 307 transitions, 3174 flow [2024-06-14 12:05:28,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3174, PETRI_PLACES=256, PETRI_TRANSITIONS=307} [2024-06-14 12:05:28,860 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-14 12:05:28,860 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 307 transitions, 3174 flow [2024-06-14 12:05:28,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:28,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:28,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:28,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:05:28,860 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)] === [2024-06-14 12:05:28,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1928960692, now seen corresponding path program 12 times [2024-06-14 12:05:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:28,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455592239] [2024-06-14 12:05:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455592239] [2024-06-14 12:05:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455592239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:29,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:29,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168027402] [2024-06-14 12:05:29,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:30,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:30,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 307 transitions, 3174 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:30,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:30,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:30,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:31,339 INFO L124 PetriNetUnfolderBase]: 2993/4700 cut-off events. [2024-06-14 12:05:31,339 INFO L125 PetriNetUnfolderBase]: For 742888/742896 co-relation queries the response was YES. [2024-06-14 12:05:31,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48148 conditions, 4700 events. 2993/4700 cut-off events. For 742888/742896 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26529 event pairs, 671 based on Foata normal form. 7/4704 useless extension candidates. Maximal degree in co-relation 48031. Up to 4202 conditions per place. [2024-06-14 12:05:31,399 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 250 selfloop transitions, 84 changer transitions 0/339 dead transitions. [2024-06-14 12:05:31,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 339 transitions, 3924 flow [2024-06-14 12:05:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 12:05:31,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 12:05:31,400 INFO L175 Difference]: Start difference. First operand has 256 places, 307 transitions, 3174 flow. Second operand 10 states and 192 transitions. [2024-06-14 12:05:31,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 339 transitions, 3924 flow [2024-06-14 12:05:32,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 339 transitions, 3716 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:32,184 INFO L231 Difference]: Finished difference. Result has 263 places, 307 transitions, 3141 flow [2024-06-14 12:05:32,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3141, PETRI_PLACES=263, PETRI_TRANSITIONS=307} [2024-06-14 12:05:32,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-14 12:05:32,184 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 307 transitions, 3141 flow [2024-06-14 12:05:32,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:32,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:32,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:05:32,185 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)] === [2024-06-14 12:05:32,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1230968396, now seen corresponding path program 13 times [2024-06-14 12:05:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:32,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762570824] [2024-06-14 12:05:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:33,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:33,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762570824] [2024-06-14 12:05:33,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762570824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:33,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:33,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:33,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428249880] [2024-06-14 12:05:33,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:33,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:33,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:33,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:33,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:33,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 307 transitions, 3141 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:33,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:33,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:33,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:34,678 INFO L124 PetriNetUnfolderBase]: 3010/4717 cut-off events. [2024-06-14 12:05:34,678 INFO L125 PetriNetUnfolderBase]: For 754780/754788 co-relation queries the response was YES. [2024-06-14 12:05:34,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48078 conditions, 4717 events. 3010/4717 cut-off events. For 754780/754788 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26549 event pairs, 656 based on Foata normal form. 7/4721 useless extension candidates. Maximal degree in co-relation 47959. Up to 4124 conditions per place. [2024-06-14 12:05:34,737 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 247 selfloop transitions, 91 changer transitions 0/343 dead transitions. [2024-06-14 12:05:34,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 343 transitions, 4003 flow [2024-06-14 12:05:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:05:34,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 12:05:34,739 INFO L175 Difference]: Start difference. First operand has 263 places, 307 transitions, 3141 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:05:34,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 343 transitions, 4003 flow [2024-06-14 12:05:35,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 343 transitions, 3828 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 12:05:35,368 INFO L231 Difference]: Finished difference. Result has 264 places, 309 transitions, 3259 flow [2024-06-14 12:05:35,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3259, PETRI_PLACES=264, PETRI_TRANSITIONS=309} [2024-06-14 12:05:35,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-14 12:05:35,368 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 309 transitions, 3259 flow [2024-06-14 12:05:35,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:35,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:05:35,369 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)] === [2024-06-14 12:05:35,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash -888669806, now seen corresponding path program 14 times [2024-06-14 12:05:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074339237] [2024-06-14 12:05:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:36,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074339237] [2024-06-14 12:05:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074339237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:36,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:36,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140123407] [2024-06-14 12:05:36,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:36,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:36,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:36,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:36,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:36,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 309 transitions, 3259 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:36,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:36,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:36,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:37,836 INFO L124 PetriNetUnfolderBase]: 3027/4734 cut-off events. [2024-06-14 12:05:37,836 INFO L125 PetriNetUnfolderBase]: For 777273/777281 co-relation queries the response was YES. [2024-06-14 12:05:37,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48823 conditions, 4734 events. 3027/4734 cut-off events. For 777273/777281 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26650 event pairs, 548 based on Foata normal form. 7/4738 useless extension candidates. Maximal degree in co-relation 48703. Up to 3638 conditions per place. [2024-06-14 12:05:37,897 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 218 selfloop transitions, 127 changer transitions 0/350 dead transitions. [2024-06-14 12:05:37,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 350 transitions, 4519 flow [2024-06-14 12:05:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:05:37,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 12:05:37,898 INFO L175 Difference]: Start difference. First operand has 264 places, 309 transitions, 3259 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:05:37,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 350 transitions, 4519 flow [2024-06-14 12:05:38,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 350 transitions, 4244 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:38,520 INFO L231 Difference]: Finished difference. Result has 266 places, 313 transitions, 3457 flow [2024-06-14 12:05:38,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3457, PETRI_PLACES=266, PETRI_TRANSITIONS=313} [2024-06-14 12:05:38,521 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-14 12:05:38,521 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 313 transitions, 3457 flow [2024-06-14 12:05:38,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:38,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:38,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:38,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:05:38,521 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:38,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1705434788, now seen corresponding path program 6 times [2024-06-14 12:05:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:38,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272152098] [2024-06-14 12:05:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272152098] [2024-06-14 12:05:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272152098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:39,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:39,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098512266] [2024-06-14 12:05:39,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:39,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:39,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:39,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:39,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 313 transitions, 3457 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:39,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:39,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:39,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:41,031 INFO L124 PetriNetUnfolderBase]: 3052/4780 cut-off events. [2024-06-14 12:05:41,032 INFO L125 PetriNetUnfolderBase]: For 821901/821907 co-relation queries the response was YES. [2024-06-14 12:05:41,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49015 conditions, 4780 events. 3052/4780 cut-off events. For 821901/821907 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26958 event pairs, 640 based on Foata normal form. 21/4797 useless extension candidates. Maximal degree in co-relation 48894. Up to 4056 conditions per place. [2024-06-14 12:05:41,093 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 260 selfloop transitions, 87 changer transitions 0/352 dead transitions. [2024-06-14 12:05:41,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 352 transitions, 4401 flow [2024-06-14 12:05:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:05:41,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:05:41,094 INFO L175 Difference]: Start difference. First operand has 266 places, 313 transitions, 3457 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:05:41,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 352 transitions, 4401 flow [2024-06-14 12:05:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 4177 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:41,887 INFO L231 Difference]: Finished difference. Result has 270 places, 314 transitions, 3496 flow [2024-06-14 12:05:41,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3496, PETRI_PLACES=270, PETRI_TRANSITIONS=314} [2024-06-14 12:05:41,888 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-14 12:05:41,888 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 314 transitions, 3496 flow [2024-06-14 12:05:41,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:41,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:41,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:41,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:05:41,888 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:41,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1477348940, now seen corresponding path program 15 times [2024-06-14 12:05:41,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:41,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353379410] [2024-06-14 12:05:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:41,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:43,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353379410] [2024-06-14 12:05:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353379410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:43,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:43,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:43,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916191100] [2024-06-14 12:05:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:43,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:43,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:43,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 314 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:43,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:43,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:43,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:44,419 INFO L124 PetriNetUnfolderBase]: 3080/4829 cut-off events. [2024-06-14 12:05:44,419 INFO L125 PetriNetUnfolderBase]: For 795011/795019 co-relation queries the response was YES. [2024-06-14 12:05:44,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49398 conditions, 4829 events. 3080/4829 cut-off events. For 795011/795019 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27267 event pairs, 667 based on Foata normal form. 7/4833 useless extension candidates. Maximal degree in co-relation 49275. Up to 4342 conditions per place. [2024-06-14 12:05:44,483 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 265 selfloop transitions, 81 changer transitions 0/351 dead transitions. [2024-06-14 12:05:44,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 351 transitions, 4403 flow [2024-06-14 12:05:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-14 12:05:44,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:05:44,485 INFO L175 Difference]: Start difference. First operand has 270 places, 314 transitions, 3496 flow. Second operand 10 states and 195 transitions. [2024-06-14 12:05:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 351 transitions, 4403 flow [2024-06-14 12:05:45,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 351 transitions, 4166 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:45,494 INFO L231 Difference]: Finished difference. Result has 272 places, 319 transitions, 3565 flow [2024-06-14 12:05:45,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3565, PETRI_PLACES=272, PETRI_TRANSITIONS=319} [2024-06-14 12:05:45,495 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-14 12:05:45,495 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 319 transitions, 3565 flow [2024-06-14 12:05:45,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:45,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:45,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:45,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:05:45,495 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:45,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1477109930, now seen corresponding path program 16 times [2024-06-14 12:05:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:45,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624364267] [2024-06-14 12:05:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:46,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624364267] [2024-06-14 12:05:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624364267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885576925] [2024-06-14 12:05:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:46,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:46,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 319 transitions, 3565 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:46,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:46,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:46,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:48,038 INFO L124 PetriNetUnfolderBase]: 3097/4861 cut-off events. [2024-06-14 12:05:48,038 INFO L125 PetriNetUnfolderBase]: For 803044/803052 co-relation queries the response was YES. [2024-06-14 12:05:48,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49323 conditions, 4861 events. 3097/4861 cut-off events. For 803044/803052 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27603 event pairs, 677 based on Foata normal form. 7/4865 useless extension candidates. Maximal degree in co-relation 49199. Up to 4328 conditions per place. [2024-06-14 12:05:48,100 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 265 selfloop transitions, 84 changer transitions 0/354 dead transitions. [2024-06-14 12:05:48,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 354 transitions, 4447 flow [2024-06-14 12:05:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:05:48,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 12:05:48,101 INFO L175 Difference]: Start difference. First operand has 272 places, 319 transitions, 3565 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:05:48,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 354 transitions, 4447 flow [2024-06-14 12:05:49,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 354 transitions, 4170 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:49,035 INFO L231 Difference]: Finished difference. Result has 275 places, 321 transitions, 3567 flow [2024-06-14 12:05:49,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3567, PETRI_PLACES=275, PETRI_TRANSITIONS=321} [2024-06-14 12:05:49,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-14 12:05:49,035 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 321 transitions, 3567 flow [2024-06-14 12:05:49,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:49,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:49,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:49,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:05:49,036 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)] === [2024-06-14 12:05:49,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1468778060, now seen corresponding path program 17 times [2024-06-14 12:05:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:49,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016841659] [2024-06-14 12:05:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:49,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016841659] [2024-06-14 12:05:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016841659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:50,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162483894] [2024-06-14 12:05:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:50,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:50,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 321 transitions, 3567 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:50,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:50,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:50,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:51,582 INFO L124 PetriNetUnfolderBase]: 3114/4888 cut-off events. [2024-06-14 12:05:51,582 INFO L125 PetriNetUnfolderBase]: For 821501/821509 co-relation queries the response was YES. [2024-06-14 12:05:51,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49653 conditions, 4888 events. 3114/4888 cut-off events. For 821501/821509 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27745 event pairs, 672 based on Foata normal form. 7/4892 useless extension candidates. Maximal degree in co-relation 49529. Up to 4239 conditions per place. [2024-06-14 12:05:51,647 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 263 selfloop transitions, 91 changer transitions 0/359 dead transitions. [2024-06-14 12:05:51,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 4755 flow [2024-06-14 12:05:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 12:05:51,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 12:05:51,649 INFO L175 Difference]: Start difference. First operand has 275 places, 321 transitions, 3567 flow. Second operand 10 states and 199 transitions. [2024-06-14 12:05:51,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 4755 flow [2024-06-14 12:05:52,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 359 transitions, 4498 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:52,599 INFO L231 Difference]: Finished difference. Result has 277 places, 323 transitions, 3603 flow [2024-06-14 12:05:52,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3603, PETRI_PLACES=277, PETRI_TRANSITIONS=323} [2024-06-14 12:05:52,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-14 12:05:52,599 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 323 transitions, 3603 flow [2024-06-14 12:05:52,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:52,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:52,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:05:52,600 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)] === [2024-06-14 12:05:52,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1698763340, now seen corresponding path program 18 times [2024-06-14 12:05:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:52,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75333580] [2024-06-14 12:05:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:52,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:53,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:53,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75333580] [2024-06-14 12:05:53,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75333580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:53,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:53,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:53,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322423647] [2024-06-14 12:05:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:53,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:53,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:53,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:53,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 323 transitions, 3603 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:53,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:53,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:53,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:55,140 INFO L124 PetriNetUnfolderBase]: 3142/4926 cut-off events. [2024-06-14 12:05:55,140 INFO L125 PetriNetUnfolderBase]: For 840299/840307 co-relation queries the response was YES. [2024-06-14 12:05:55,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50157 conditions, 4926 events. 3142/4926 cut-off events. For 840299/840307 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27919 event pairs, 677 based on Foata normal form. 7/4930 useless extension candidates. Maximal degree in co-relation 50032. Up to 4435 conditions per place. [2024-06-14 12:05:55,213 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 270 selfloop transitions, 85 changer transitions 0/360 dead transitions. [2024-06-14 12:05:55,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 360 transitions, 4540 flow [2024-06-14 12:05:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 12:05:55,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 12:05:55,214 INFO L175 Difference]: Start difference. First operand has 277 places, 323 transitions, 3603 flow. Second operand 10 states and 194 transitions. [2024-06-14 12:05:55,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 360 transitions, 4540 flow [2024-06-14 12:05:56,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 360 transitions, 4033 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-06-14 12:05:56,115 INFO L231 Difference]: Finished difference. Result has 277 places, 328 transitions, 3422 flow [2024-06-14 12:05:56,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3422, PETRI_PLACES=277, PETRI_TRANSITIONS=328} [2024-06-14 12:05:56,115 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-14 12:05:56,115 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 328 transitions, 3422 flow [2024-06-14 12:05:56,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:56,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:56,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:05:56,116 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)] === [2024-06-14 12:05:56,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1698754970, now seen corresponding path program 19 times [2024-06-14 12:05:56,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204152889] [2024-06-14 12:05:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:57,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204152889] [2024-06-14 12:05:57,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204152889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:57,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:57,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:05:57,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666592354] [2024-06-14 12:05:57,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:05:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:05:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:05:57,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:05:57,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 328 transitions, 3422 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:57,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:57,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:05:57,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:58,720 INFO L124 PetriNetUnfolderBase]: 3159/4953 cut-off events. [2024-06-14 12:05:58,720 INFO L125 PetriNetUnfolderBase]: For 856329/856337 co-relation queries the response was YES. [2024-06-14 12:05:58,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49688 conditions, 4953 events. 3159/4953 cut-off events. For 856329/856337 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28117 event pairs, 672 based on Foata normal form. 7/4957 useless extension candidates. Maximal degree in co-relation 49564. Up to 4397 conditions per place. [2024-06-14 12:05:58,787 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 270 selfloop transitions, 90 changer transitions 0/365 dead transitions. [2024-06-14 12:05:58,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 365 transitions, 4620 flow [2024-06-14 12:05:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:05:58,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 12:05:58,789 INFO L175 Difference]: Start difference. First operand has 277 places, 328 transitions, 3422 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:05:58,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 365 transitions, 4620 flow [2024-06-14 12:05:59,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 365 transitions, 4385 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:59,843 INFO L231 Difference]: Finished difference. Result has 281 places, 330 transitions, 3470 flow [2024-06-14 12:05:59,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3470, PETRI_PLACES=281, PETRI_TRANSITIONS=330} [2024-06-14 12:05:59,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-14 12:05:59,844 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 330 transitions, 3470 flow [2024-06-14 12:05:59,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:59,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:59,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:05:59,845 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)] === [2024-06-14 12:05:59,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1705250090, now seen corresponding path program 20 times [2024-06-14 12:05:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:59,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425392351] [2024-06-14 12:05:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425392351] [2024-06-14 12:06:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425392351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:00,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:00,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:06:00,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249812504] [2024-06-14 12:06:00,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:00,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:06:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:06:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:06:01,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:06:01,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 330 transitions, 3470 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:01,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:01,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:06:01,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:02,347 INFO L124 PetriNetUnfolderBase]: 3151/4941 cut-off events. [2024-06-14 12:06:02,347 INFO L125 PetriNetUnfolderBase]: For 860836/860844 co-relation queries the response was YES. [2024-06-14 12:06:02,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49301 conditions, 4941 events. 3151/4941 cut-off events. For 860836/860844 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27985 event pairs, 675 based on Foata normal form. 7/4945 useless extension candidates. Maximal degree in co-relation 49176. Up to 4450 conditions per place. [2024-06-14 12:06:02,411 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 270 selfloop transitions, 87 changer transitions 0/362 dead transitions. [2024-06-14 12:06:02,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 362 transitions, 4266 flow [2024-06-14 12:06:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:06:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:06:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:06:02,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-14 12:06:02,412 INFO L175 Difference]: Start difference. First operand has 281 places, 330 transitions, 3470 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:06:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 362 transitions, 4266 flow [2024-06-14 12:06:03,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 362 transitions, 3908 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-14 12:06:03,402 INFO L231 Difference]: Finished difference. Result has 283 places, 330 transitions, 3293 flow [2024-06-14 12:06:03,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3293, PETRI_PLACES=283, PETRI_TRANSITIONS=330} [2024-06-14 12:06:03,402 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-14 12:06:03,402 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 330 transitions, 3293 flow [2024-06-14 12:06:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:03,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:03,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:03,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:06:03,403 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:03,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:03,403 INFO L85 PathProgramCache]: Analyzing trace with hash 359025723, now seen corresponding path program 4 times [2024-06-14 12:06:03,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:03,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146222989] [2024-06-14 12:06:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:03,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:04,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:04,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146222989] [2024-06-14 12:06:04,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146222989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:04,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:04,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382408985] [2024-06-14 12:06:04,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:04,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:04,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 330 transitions, 3293 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:04,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:04,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:04,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:05,391 INFO L124 PetriNetUnfolderBase]: 2991/4785 cut-off events. [2024-06-14 12:06:05,391 INFO L125 PetriNetUnfolderBase]: For 866956/866962 co-relation queries the response was YES. [2024-06-14 12:06:05,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47643 conditions, 4785 events. 2991/4785 cut-off events. For 866956/866962 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27962 event pairs, 679 based on Foata normal form. 3/4775 useless extension candidates. Maximal degree in co-relation 47517. Up to 4270 conditions per place. [2024-06-14 12:06:05,463 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 263 selfloop transitions, 40 changer transitions 0/344 dead transitions. [2024-06-14 12:06:05,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 344 transitions, 4017 flow [2024-06-14 12:06:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:06:05,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 12:06:05,465 INFO L175 Difference]: Start difference. First operand has 283 places, 330 transitions, 3293 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:06:05,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 344 transitions, 4017 flow [2024-06-14 12:06:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 344 transitions, 3805 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 12:06:06,504 INFO L231 Difference]: Finished difference. Result has 281 places, 333 transitions, 3263 flow [2024-06-14 12:06:06,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3263, PETRI_PLACES=281, PETRI_TRANSITIONS=333} [2024-06-14 12:06:06,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-14 12:06:06,505 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 333 transitions, 3263 flow [2024-06-14 12:06:06,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:06,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:06,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:06,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:06:06,505 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:06,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 543366386, now seen corresponding path program 4 times [2024-06-14 12:06:06,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:06,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608963818] [2024-06-14 12:06:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:07,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:07,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608963818] [2024-06-14 12:06:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608963818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:07,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338205914] [2024-06-14 12:06:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:07,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:07,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 333 transitions, 3263 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:07,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:07,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:07,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:08,797 INFO L124 PetriNetUnfolderBase]: 2992/4781 cut-off events. [2024-06-14 12:06:08,797 INFO L125 PetriNetUnfolderBase]: For 882391/882399 co-relation queries the response was YES. [2024-06-14 12:06:08,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47966 conditions, 4781 events. 2992/4781 cut-off events. For 882391/882399 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27894 event pairs, 663 based on Foata normal form. 4/4773 useless extension candidates. Maximal degree in co-relation 47840. Up to 4300 conditions per place. [2024-06-14 12:06:08,857 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 275 selfloop transitions, 30 changer transitions 0/346 dead transitions. [2024-06-14 12:06:08,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 346 transitions, 3989 flow [2024-06-14 12:06:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:06:08,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 12:06:08,858 INFO L175 Difference]: Start difference. First operand has 281 places, 333 transitions, 3263 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:06:08,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 346 transitions, 3989 flow [2024-06-14 12:06:09,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 346 transitions, 3829 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:09,638 INFO L231 Difference]: Finished difference. Result has 283 places, 336 transitions, 3267 flow [2024-06-14 12:06:09,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3267, PETRI_PLACES=283, PETRI_TRANSITIONS=336} [2024-06-14 12:06:09,639 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-14 12:06:09,639 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 336 transitions, 3267 flow [2024-06-14 12:06:09,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:09,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:09,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:09,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:06:09,639 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)] === [2024-06-14 12:06:09,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:09,639 INFO L85 PathProgramCache]: Analyzing trace with hash 543379871, now seen corresponding path program 2 times [2024-06-14 12:06:09,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:09,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128005100] [2024-06-14 12:06:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:09,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:10,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:10,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128005100] [2024-06-14 12:06:10,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128005100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:10,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:10,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:10,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232575505] [2024-06-14 12:06:10,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:10,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:10,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:10,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:10,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 336 transitions, 3267 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:10,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:10,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:10,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:11,712 INFO L124 PetriNetUnfolderBase]: 2767/4529 cut-off events. [2024-06-14 12:06:11,713 INFO L125 PetriNetUnfolderBase]: For 900462/900470 co-relation queries the response was YES. [2024-06-14 12:06:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47130 conditions, 4529 events. 2767/4529 cut-off events. For 900462/900470 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27244 event pairs, 606 based on Foata normal form. 8/4513 useless extension candidates. Maximal degree in co-relation 47003. Up to 3903 conditions per place. [2024-06-14 12:06:11,776 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 259 selfloop transitions, 22 changer transitions 0/351 dead transitions. [2024-06-14 12:06:11,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 351 transitions, 3948 flow [2024-06-14 12:06:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:06:11,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:06:11,777 INFO L175 Difference]: Start difference. First operand has 283 places, 336 transitions, 3267 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:06:11,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 351 transitions, 3948 flow [2024-06-14 12:06:12,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 351 transitions, 3806 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:12,685 INFO L231 Difference]: Finished difference. Result has 285 places, 339 transitions, 3265 flow [2024-06-14 12:06:12,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=285, PETRI_TRANSITIONS=339} [2024-06-14 12:06:12,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-14 12:06:12,686 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 339 transitions, 3265 flow [2024-06-14 12:06:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:12,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:12,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:12,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:06:12,686 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:12,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash 373786621, now seen corresponding path program 3 times [2024-06-14 12:06:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:12,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596557560] [2024-06-14 12:06:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:12,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:13,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:13,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596557560] [2024-06-14 12:06:13,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596557560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:13,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:13,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:13,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711546077] [2024-06-14 12:06:13,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:13,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:13,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 339 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:13,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:13,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:13,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:14,983 INFO L124 PetriNetUnfolderBase]: 2777/4541 cut-off events. [2024-06-14 12:06:14,983 INFO L125 PetriNetUnfolderBase]: For 918410/918410 co-relation queries the response was YES. [2024-06-14 12:06:15,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47717 conditions, 4541 events. 2777/4541 cut-off events. For 918410/918410 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27301 event pairs, 597 based on Foata normal form. 2/4520 useless extension candidates. Maximal degree in co-relation 47589. Up to 3930 conditions per place. [2024-06-14 12:06:15,048 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 268 selfloop transitions, 17 changer transitions 0/355 dead transitions. [2024-06-14 12:06:15,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 355 transitions, 3966 flow [2024-06-14 12:06:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:06:15,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:06:15,050 INFO L175 Difference]: Start difference. First operand has 285 places, 339 transitions, 3265 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:06:15,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 355 transitions, 3966 flow [2024-06-14 12:06:16,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 355 transitions, 3852 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:16,097 INFO L231 Difference]: Finished difference. Result has 287 places, 342 transitions, 3287 flow [2024-06-14 12:06:16,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3287, PETRI_PLACES=287, PETRI_TRANSITIONS=342} [2024-06-14 12:06:16,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-14 12:06:16,098 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 342 transitions, 3287 flow [2024-06-14 12:06:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:16,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:16,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:16,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:06:16,098 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:16,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1303869774, now seen corresponding path program 5 times [2024-06-14 12:06:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:16,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685381679] [2024-06-14 12:06:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:16,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685381679] [2024-06-14 12:06:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685381679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:17,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:17,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:17,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515291070] [2024-06-14 12:06:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:17,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:17,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 342 transitions, 3287 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:17,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:17,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:17,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:18,333 INFO L124 PetriNetUnfolderBase]: 3017/4816 cut-off events. [2024-06-14 12:06:18,333 INFO L125 PetriNetUnfolderBase]: For 936225/936233 co-relation queries the response was YES. [2024-06-14 12:06:18,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49581 conditions, 4816 events. 3017/4816 cut-off events. For 936225/936233 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28112 event pairs, 663 based on Foata normal form. 4/4808 useless extension candidates. Maximal degree in co-relation 49452. Up to 4307 conditions per place. [2024-06-14 12:06:18,397 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 265 selfloop transitions, 53 changer transitions 0/359 dead transitions. [2024-06-14 12:06:18,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 359 transitions, 4341 flow [2024-06-14 12:06:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:18,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:06:18,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:06:18,398 INFO L175 Difference]: Start difference. First operand has 287 places, 342 transitions, 3287 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:06:18,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 359 transitions, 4341 flow [2024-06-14 12:06:19,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 359 transitions, 4201 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:19,364 INFO L231 Difference]: Finished difference. Result has 288 places, 348 transitions, 3469 flow [2024-06-14 12:06:19,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3469, PETRI_PLACES=288, PETRI_TRANSITIONS=348} [2024-06-14 12:06:19,365 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-14 12:06:19,365 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 348 transitions, 3469 flow [2024-06-14 12:06:19,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:19,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:19,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:19,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:06:19,365 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:19,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:19,365 INFO L85 PathProgramCache]: Analyzing trace with hash 373771741, now seen corresponding path program 4 times [2024-06-14 12:06:19,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:19,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402230532] [2024-06-14 12:06:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:19,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402230532] [2024-06-14 12:06:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402230532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:20,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:20,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939152307] [2024-06-14 12:06:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:20,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:20,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:20,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:20,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 348 transitions, 3469 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:20,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:20,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:21,606 INFO L124 PetriNetUnfolderBase]: 2779/4546 cut-off events. [2024-06-14 12:06:21,606 INFO L125 PetriNetUnfolderBase]: For 946271/946276 co-relation queries the response was YES. [2024-06-14 12:06:21,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48378 conditions, 4546 events. 2779/4546 cut-off events. For 946271/946276 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27325 event pairs, 604 based on Foata normal form. 5/4527 useless extension candidates. Maximal degree in co-relation 48249. Up to 3900 conditions per place. [2024-06-14 12:06:21,668 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 38 changer transitions 0/370 dead transitions. [2024-06-14 12:06:21,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 370 transitions, 4239 flow [2024-06-14 12:06:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:06:21,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:06:21,669 INFO L175 Difference]: Start difference. First operand has 288 places, 348 transitions, 3469 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:06:21,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 370 transitions, 4239 flow [2024-06-14 12:06:23,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 370 transitions, 4104 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:23,013 INFO L231 Difference]: Finished difference. Result has 294 places, 359 transitions, 3604 flow [2024-06-14 12:06:23,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3604, PETRI_PLACES=294, PETRI_TRANSITIONS=359} [2024-06-14 12:06:23,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 12:06:23,013 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 359 transitions, 3604 flow [2024-06-14 12:06:23,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:23,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:23,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:06:23,014 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:23,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1309383784, now seen corresponding path program 6 times [2024-06-14 12:06:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:23,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964892748] [2024-06-14 12:06:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:23,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964892748] [2024-06-14 12:06:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964892748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:24,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:24,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081962748] [2024-06-14 12:06:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:24,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:24,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:24,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 359 transitions, 3604 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:24,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:24,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:24,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:25,305 INFO L124 PetriNetUnfolderBase]: 3011/4808 cut-off events. [2024-06-14 12:06:25,306 INFO L125 PetriNetUnfolderBase]: For 966907/966912 co-relation queries the response was YES. [2024-06-14 12:06:25,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50178 conditions, 4808 events. 3011/4808 cut-off events. For 966907/966912 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28038 event pairs, 661 based on Foata normal form. 3/4799 useless extension candidates. Maximal degree in co-relation 50045. Up to 4321 conditions per place. [2024-06-14 12:06:25,372 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 35 changer transitions 0/369 dead transitions. [2024-06-14 12:06:25,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 369 transitions, 4284 flow [2024-06-14 12:06:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:06:25,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 12:06:25,373 INFO L175 Difference]: Start difference. First operand has 294 places, 359 transitions, 3604 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:06:25,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 369 transitions, 4284 flow [2024-06-14 12:06:26,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 369 transitions, 4114 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:26,715 INFO L231 Difference]: Finished difference. Result has 299 places, 359 transitions, 3510 flow [2024-06-14 12:06:26,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3510, PETRI_PLACES=299, PETRI_TRANSITIONS=359} [2024-06-14 12:06:26,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-14 12:06:26,716 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 359 transitions, 3510 flow [2024-06-14 12:06:26,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:26,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:26,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:26,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:06:26,716 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:26,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:26,716 INFO L85 PathProgramCache]: Analyzing trace with hash -648828324, now seen corresponding path program 1 times [2024-06-14 12:06:26,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:26,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616238215] [2024-06-14 12:06:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:26,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:27,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616238215] [2024-06-14 12:06:27,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616238215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:27,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:27,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:27,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060637241] [2024-06-14 12:06:27,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:27,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:27,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:27,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:27,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:28,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:28,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 359 transitions, 3510 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:28,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:28,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:28,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:29,077 INFO L124 PetriNetUnfolderBase]: 2835/4607 cut-off events. [2024-06-14 12:06:29,077 INFO L125 PetriNetUnfolderBase]: For 985103/985104 co-relation queries the response was YES. [2024-06-14 12:06:29,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49121 conditions, 4607 events. 2835/4607 cut-off events. For 985103/985104 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27356 event pairs, 569 based on Foata normal form. 3/4564 useless extension candidates. Maximal degree in co-relation 48986. Up to 4104 conditions per place. [2024-06-14 12:06:29,140 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 316 selfloop transitions, 17 changer transitions 0/380 dead transitions. [2024-06-14 12:06:29,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 380 transitions, 4293 flow [2024-06-14 12:06:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:06:29,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 12:06:29,141 INFO L175 Difference]: Start difference. First operand has 299 places, 359 transitions, 3510 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:06:29,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 380 transitions, 4293 flow [2024-06-14 12:06:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 380 transitions, 4161 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:30,547 INFO L231 Difference]: Finished difference. Result has 300 places, 362 transitions, 3488 flow [2024-06-14 12:06:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3488, PETRI_PLACES=300, PETRI_TRANSITIONS=362} [2024-06-14 12:06:30,547 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-14 12:06:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 362 transitions, 3488 flow [2024-06-14 12:06:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:30,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:30,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:06:30,548 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash 167364100, now seen corresponding path program 2 times [2024-06-14 12:06:30,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:30,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464767797] [2024-06-14 12:06:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:31,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464767797] [2024-06-14 12:06:31,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464767797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:31,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:31,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446109296] [2024-06-14 12:06:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:31,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:31,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:32,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:32,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 362 transitions, 3488 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:32,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:32,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:32,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:33,182 INFO L124 PetriNetUnfolderBase]: 2850/4630 cut-off events. [2024-06-14 12:06:33,183 INFO L125 PetriNetUnfolderBase]: For 999459/999460 co-relation queries the response was YES. [2024-06-14 12:06:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49770 conditions, 4630 events. 2850/4630 cut-off events. For 999459/999460 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27475 event pairs, 563 based on Foata normal form. 3/4589 useless extension candidates. Maximal degree in co-relation 49634. Up to 4126 conditions per place. [2024-06-14 12:06:33,246 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 319 selfloop transitions, 18 changer transitions 0/384 dead transitions. [2024-06-14 12:06:33,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 384 transitions, 4306 flow [2024-06-14 12:06:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:06:33,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:06:33,247 INFO L175 Difference]: Start difference. First operand has 300 places, 362 transitions, 3488 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:06:33,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 384 transitions, 4306 flow [2024-06-14 12:06:34,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 384 transitions, 4218 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:34,672 INFO L231 Difference]: Finished difference. Result has 303 places, 369 transitions, 3552 flow [2024-06-14 12:06:34,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3552, PETRI_PLACES=303, PETRI_TRANSITIONS=369} [2024-06-14 12:06:34,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-14 12:06:34,672 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 369 transitions, 3552 flow [2024-06-14 12:06:34,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:34,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:34,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:34,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:06:34,673 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:34,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash 374017540, now seen corresponding path program 3 times [2024-06-14 12:06:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:34,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297904840] [2024-06-14 12:06:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:36,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297904840] [2024-06-14 12:06:36,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297904840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:36,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551988305] [2024-06-14 12:06:36,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:36,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:36,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:36,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 369 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:36,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:36,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:36,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:37,446 INFO L124 PetriNetUnfolderBase]: 2866/4660 cut-off events. [2024-06-14 12:06:37,446 INFO L125 PetriNetUnfolderBase]: For 1031840/1031856 co-relation queries the response was YES. [2024-06-14 12:06:37,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50583 conditions, 4660 events. 2866/4660 cut-off events. For 1031840/1031856 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27746 event pairs, 566 based on Foata normal form. 6/4621 useless extension candidates. Maximal degree in co-relation 50445. Up to 4073 conditions per place. [2024-06-14 12:06:37,517 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 302 selfloop transitions, 47 changer transitions 0/396 dead transitions. [2024-06-14 12:06:37,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 396 transitions, 4952 flow [2024-06-14 12:06:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:06:37,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 12:06:37,518 INFO L175 Difference]: Start difference. First operand has 303 places, 369 transitions, 3552 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:06:37,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 396 transitions, 4952 flow [2024-06-14 12:06:38,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 396 transitions, 4874 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:38,912 INFO L231 Difference]: Finished difference. Result has 307 places, 379 transitions, 3815 flow [2024-06-14 12:06:38,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3815, PETRI_PLACES=307, PETRI_TRANSITIONS=379} [2024-06-14 12:06:38,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 12:06:38,913 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 379 transitions, 3815 flow [2024-06-14 12:06:38,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:38,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:38,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:38,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:06:38,914 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:38,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash 366665890, now seen corresponding path program 4 times [2024-06-14 12:06:38,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:38,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474778350] [2024-06-14 12:06:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:38,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:40,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474778350] [2024-06-14 12:06:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474778350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:40,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016045175] [2024-06-14 12:06:40,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:40,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:40,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:40,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:40,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:40,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 379 transitions, 3815 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:40,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:40,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:40,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:41,852 INFO L124 PetriNetUnfolderBase]: 2877/4678 cut-off events. [2024-06-14 12:06:41,853 INFO L125 PetriNetUnfolderBase]: For 1047773/1047789 co-relation queries the response was YES. [2024-06-14 12:06:41,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51403 conditions, 4678 events. 2877/4678 cut-off events. For 1047773/1047789 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27836 event pairs, 565 based on Foata normal form. 5/4639 useless extension candidates. Maximal degree in co-relation 51263. Up to 4140 conditions per place. [2024-06-14 12:06:41,920 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 323 selfloop transitions, 30 changer transitions 0/400 dead transitions. [2024-06-14 12:06:41,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 400 transitions, 4952 flow [2024-06-14 12:06:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:06:41,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 12:06:41,921 INFO L175 Difference]: Start difference. First operand has 307 places, 379 transitions, 3815 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:06:41,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 400 transitions, 4952 flow [2024-06-14 12:06:43,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 400 transitions, 4812 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:43,553 INFO L231 Difference]: Finished difference. Result has 312 places, 386 transitions, 3923 flow [2024-06-14 12:06:43,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3923, PETRI_PLACES=312, PETRI_TRANSITIONS=386} [2024-06-14 12:06:43,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 267 predicate places. [2024-06-14 12:06:43,554 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 386 transitions, 3923 flow [2024-06-14 12:06:43,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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) [2024-06-14 12:06:43,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:43,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:43,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:06:43,555 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:43,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 558634847, now seen corresponding path program 1 times [2024-06-14 12:06:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:43,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816354717] [2024-06-14 12:06:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:45,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:45,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816354717] [2024-06-14 12:06:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816354717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:45,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348576641] [2024-06-14 12:06:45,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:45,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:06:45,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 386 transitions, 3923 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:45,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:45,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:06:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:46,365 INFO L124 PetriNetUnfolderBase]: 2818/4618 cut-off events. [2024-06-14 12:06:46,365 INFO L125 PetriNetUnfolderBase]: For 1056590/1056590 co-relation queries the response was YES. [2024-06-14 12:06:46,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50991 conditions, 4618 events. 2818/4618 cut-off events. For 1056590/1056590 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27840 event pairs, 597 based on Foata normal form. 2/4597 useless extension candidates. Maximal degree in co-relation 50849. Up to 4003 conditions per place. [2024-06-14 12:06:46,434 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 311 selfloop transitions, 19 changer transitions 0/402 dead transitions. [2024-06-14 12:06:46,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 402 transitions, 4705 flow [2024-06-14 12:06:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:06:46,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:06:46,435 INFO L175 Difference]: Start difference. First operand has 312 places, 386 transitions, 3923 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:06:46,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 402 transitions, 4705 flow [2024-06-14 12:06:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 402 transitions, 4617 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:47,804 INFO L231 Difference]: Finished difference. Result has 318 places, 389 transitions, 3977 flow [2024-06-14 12:06:47,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3835, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3977, PETRI_PLACES=318, PETRI_TRANSITIONS=389} [2024-06-14 12:06:47,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-14 12:06:47,804 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 389 transitions, 3977 flow [2024-06-14 12:06:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:47,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:47,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:06:47,805 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:47,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1377331389, now seen corresponding path program 1 times [2024-06-14 12:06:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019229016] [2024-06-14 12:06:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019229016] [2024-06-14 12:06:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019229016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:48,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:48,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090476736] [2024-06-14 12:06:48,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:48,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:06:48,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 389 transitions, 3977 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:48,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:48,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:06:48,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:49,950 INFO L124 PetriNetUnfolderBase]: 3231/5068 cut-off events. [2024-06-14 12:06:49,950 INFO L125 PetriNetUnfolderBase]: For 1071772/1071774 co-relation queries the response was YES. [2024-06-14 12:06:49,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54004 conditions, 5068 events. 3231/5068 cut-off events. For 1071772/1071774 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28823 event pairs, 655 based on Foata normal form. 4/5070 useless extension candidates. Maximal degree in co-relation 53859. Up to 4806 conditions per place. [2024-06-14 12:06:50,023 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 382 selfloop transitions, 31 changer transitions 0/418 dead transitions. [2024-06-14 12:06:50,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 418 transitions, 4995 flow [2024-06-14 12:06:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:06:50,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:06:50,025 INFO L175 Difference]: Start difference. First operand has 318 places, 389 transitions, 3977 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:06:50,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 418 transitions, 4995 flow [2024-06-14 12:06:51,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 418 transitions, 4878 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:51,752 INFO L231 Difference]: Finished difference. Result has 320 places, 392 transitions, 4042 flow [2024-06-14 12:06:51,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4042, PETRI_PLACES=320, PETRI_TRANSITIONS=392} [2024-06-14 12:06:51,753 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-14 12:06:51,753 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 392 transitions, 4042 flow [2024-06-14 12:06:51,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:51,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:51,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:51,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:06:51,753 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)] === [2024-06-14 12:06:51,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash 44560943, now seen corresponding path program 2 times [2024-06-14 12:06:51,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:51,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453725350] [2024-06-14 12:06:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:51,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453725350] [2024-06-14 12:06:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453725350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:52,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:52,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372688376] [2024-06-14 12:06:52,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:52,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:06:52,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 392 transitions, 4042 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:52,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:52,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:06:52,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:54,034 INFO L124 PetriNetUnfolderBase]: 3257/5108 cut-off events. [2024-06-14 12:06:54,034 INFO L125 PetriNetUnfolderBase]: For 1105059/1105061 co-relation queries the response was YES. [2024-06-14 12:06:54,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55227 conditions, 5108 events. 3257/5108 cut-off events. For 1105059/1105061 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29139 event pairs, 656 based on Foata normal form. 4/5110 useless extension candidates. Maximal degree in co-relation 55081. Up to 4822 conditions per place. [2024-06-14 12:06:54,108 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 379 selfloop transitions, 39 changer transitions 0/423 dead transitions. [2024-06-14 12:06:54,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 423 transitions, 5404 flow [2024-06-14 12:06:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:06:54,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:06:54,109 INFO L175 Difference]: Start difference. First operand has 320 places, 392 transitions, 4042 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:06:54,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 423 transitions, 5404 flow [2024-06-14 12:06:56,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 423 transitions, 5261 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:56,244 INFO L231 Difference]: Finished difference. Result has 323 places, 398 transitions, 4217 flow [2024-06-14 12:06:56,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4217, PETRI_PLACES=323, PETRI_TRANSITIONS=398} [2024-06-14 12:06:56,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-14 12:06:56,244 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 398 transitions, 4217 flow [2024-06-14 12:06:56,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:56,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:56,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:56,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:06:56,245 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:56,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1482752558, now seen corresponding path program 1 times [2024-06-14 12:06:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:56,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900306059] [2024-06-14 12:06:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:56,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900306059] [2024-06-14 12:06:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900306059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:57,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:57,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:06:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813521973] [2024-06-14 12:06:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:57,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:06:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:06:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:06:57,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:06:57,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 398 transitions, 4217 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:06:57,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:57,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:06:57,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:59,135 INFO L124 PetriNetUnfolderBase]: 3380/5352 cut-off events. [2024-06-14 12:06:59,135 INFO L125 PetriNetUnfolderBase]: For 1175444/1175446 co-relation queries the response was YES. [2024-06-14 12:06:59,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57261 conditions, 5352 events. 3380/5352 cut-off events. For 1175444/1175446 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31245 event pairs, 658 based on Foata normal form. 12/5361 useless extension candidates. Maximal degree in co-relation 57114. Up to 4404 conditions per place. [2024-06-14 12:06:59,234 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 346 selfloop transitions, 106 changer transitions 0/457 dead transitions. [2024-06-14 12:06:59,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 457 transitions, 5487 flow [2024-06-14 12:06:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:06:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:06:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 12:06:59,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-14 12:06:59,235 INFO L175 Difference]: Start difference. First operand has 323 places, 398 transitions, 4217 flow. Second operand 11 states and 224 transitions. [2024-06-14 12:06:59,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 457 transitions, 5487 flow [2024-06-14 12:07:01,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 457 transitions, 5330 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:01,612 INFO L231 Difference]: Finished difference. Result has 332 places, 406 transitions, 4458 flow [2024-06-14 12:07:01,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4458, PETRI_PLACES=332, PETRI_TRANSITIONS=406} [2024-06-14 12:07:01,613 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-14 12:07:01,613 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 406 transitions, 4458 flow [2024-06-14 12:07:01,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:01,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:01,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:01,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:07:01,613 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:01,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1379151506, now seen corresponding path program 2 times [2024-06-14 12:07:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:01,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588523306] [2024-06-14 12:07:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:01,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:02,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:02,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588523306] [2024-06-14 12:07:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588523306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:02,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:02,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:07:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931869478] [2024-06-14 12:07:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:02,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:07:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:07:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:07:02,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:02,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 406 transitions, 4458 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:02,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:02,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:02,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:04,502 INFO L124 PetriNetUnfolderBase]: 3490/5550 cut-off events. [2024-06-14 12:07:04,502 INFO L125 PetriNetUnfolderBase]: For 1208460/1208462 co-relation queries the response was YES. [2024-06-14 12:07:04,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59416 conditions, 5550 events. 3490/5550 cut-off events. For 1208460/1208462 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32949 event pairs, 687 based on Foata normal form. 12/5559 useless extension candidates. Maximal degree in co-relation 59265. Up to 4677 conditions per place. [2024-06-14 12:07:04,585 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 356 selfloop transitions, 100 changer transitions 0/461 dead transitions. [2024-06-14 12:07:04,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 461 transitions, 5717 flow [2024-06-14 12:07:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:07:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:07:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 12:07:04,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-14 12:07:04,586 INFO L175 Difference]: Start difference. First operand has 332 places, 406 transitions, 4458 flow. Second operand 11 states and 224 transitions. [2024-06-14 12:07:04,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 461 transitions, 5717 flow [2024-06-14 12:07:06,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 461 transitions, 5449 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:06,977 INFO L231 Difference]: Finished difference. Result has 339 places, 412 transitions, 4557 flow [2024-06-14 12:07:06,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4196, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4557, PETRI_PLACES=339, PETRI_TRANSITIONS=412} [2024-06-14 12:07:06,977 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 12:07:06,977 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 412 transitions, 4557 flow [2024-06-14 12:07:06,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:06,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:06,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:06,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:07:06,977 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:06,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash 625819610, now seen corresponding path program 3 times [2024-06-14 12:07:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:06,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187477778] [2024-06-14 12:07:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187477778] [2024-06-14 12:07:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187477778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:08,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:08,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:07:08,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118707176] [2024-06-14 12:07:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:08,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:07:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:07:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:07:08,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:08,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 412 transitions, 4557 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:08,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:08,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:08,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:10,258 INFO L124 PetriNetUnfolderBase]: 3572/5714 cut-off events. [2024-06-14 12:07:10,258 INFO L125 PetriNetUnfolderBase]: For 1236189/1236191 co-relation queries the response was YES. [2024-06-14 12:07:10,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60657 conditions, 5714 events. 3572/5714 cut-off events. For 1236189/1236191 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34517 event pairs, 717 based on Foata normal form. 12/5723 useless extension candidates. Maximal degree in co-relation 60503. Up to 4819 conditions per place. [2024-06-14 12:07:10,335 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 356 selfloop transitions, 104 changer transitions 0/465 dead transitions. [2024-06-14 12:07:10,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 465 transitions, 5807 flow [2024-06-14 12:07:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:07:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:07:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 12:07:10,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-14 12:07:10,337 INFO L175 Difference]: Start difference. First operand has 339 places, 412 transitions, 4557 flow. Second operand 11 states and 223 transitions. [2024-06-14 12:07:10,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 465 transitions, 5807 flow [2024-06-14 12:07:12,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 465 transitions, 5544 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:12,576 INFO L231 Difference]: Finished difference. Result has 345 places, 416 transitions, 4640 flow [2024-06-14 12:07:12,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4640, PETRI_PLACES=345, PETRI_TRANSITIONS=416} [2024-06-14 12:07:12,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-14 12:07:12,577 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 416 transitions, 4640 flow [2024-06-14 12:07:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:12,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:12,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:12,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:07:12,577 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:12,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 633228920, now seen corresponding path program 4 times [2024-06-14 12:07:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446894066] [2024-06-14 12:07:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:13,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:13,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446894066] [2024-06-14 12:07:13,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446894066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:13,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:13,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:07:13,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548646067] [2024-06-14 12:07:13,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:13,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:07:13,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:07:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:07:14,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:14,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 416 transitions, 4640 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:14,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:14,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:14,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:15,900 INFO L124 PetriNetUnfolderBase]: 3613/5795 cut-off events. [2024-06-14 12:07:15,900 INFO L125 PetriNetUnfolderBase]: For 1259915/1259917 co-relation queries the response was YES. [2024-06-14 12:07:15,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61067 conditions, 5795 events. 3613/5795 cut-off events. For 1259915/1259917 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35162 event pairs, 721 based on Foata normal form. 12/5804 useless extension candidates. Maximal degree in co-relation 60911. Up to 4330 conditions per place. [2024-06-14 12:07:16,020 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 348 selfloop transitions, 114 changer transitions 0/467 dead transitions. [2024-06-14 12:07:16,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 467 transitions, 5858 flow [2024-06-14 12:07:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:07:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:07:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 12:07:16,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-14 12:07:16,022 INFO L175 Difference]: Start difference. First operand has 345 places, 416 transitions, 4640 flow. Second operand 11 states and 223 transitions. [2024-06-14 12:07:16,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 467 transitions, 5858 flow [2024-06-14 12:07:18,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 467 transitions, 5605 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:18,696 INFO L231 Difference]: Finished difference. Result has 350 places, 417 transitions, 4707 flow [2024-06-14 12:07:18,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4707, PETRI_PLACES=350, PETRI_TRANSITIONS=417} [2024-06-14 12:07:18,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-14 12:07:18,697 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 417 transitions, 4707 flow [2024-06-14 12:07:18,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:07:18,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:18,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:18,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:07:18,698 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)] === [2024-06-14 12:07:18,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1554261681, now seen corresponding path program 1 times [2024-06-14 12:07:18,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:18,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263532347] [2024-06-14 12:07:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:19,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:19,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263532347] [2024-06-14 12:07:19,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263532347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:19,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451019326] [2024-06-14 12:07:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:19,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:19,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:19,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 417 transitions, 4707 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:19,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:19,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:19,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:21,408 INFO L124 PetriNetUnfolderBase]: 3408/5561 cut-off events. [2024-06-14 12:07:21,408 INFO L125 PetriNetUnfolderBase]: For 1237016/1237036 co-relation queries the response was YES. [2024-06-14 12:07:21,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59584 conditions, 5561 events. 3408/5561 cut-off events. For 1237016/1237036 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34525 event pairs, 713 based on Foata normal form. 2/5539 useless extension candidates. Maximal degree in co-relation 59427. Up to 4995 conditions per place. [2024-06-14 12:07:21,505 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 385 selfloop transitions, 23 changer transitions 0/449 dead transitions. [2024-06-14 12:07:21,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 449 transitions, 5695 flow [2024-06-14 12:07:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:07:21,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:07:21,506 INFO L175 Difference]: Start difference. First operand has 350 places, 417 transitions, 4707 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:07:21,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 449 transitions, 5695 flow [2024-06-14 12:07:23,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 449 transitions, 5393 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-14 12:07:23,970 INFO L231 Difference]: Finished difference. Result has 350 places, 420 transitions, 4553 flow [2024-06-14 12:07:23,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4553, PETRI_PLACES=350, PETRI_TRANSITIONS=420} [2024-06-14 12:07:23,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-14 12:07:23,971 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 420 transitions, 4553 flow [2024-06-14 12:07:23,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:23,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:23,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:23,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:07:23,971 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)] === [2024-06-14 12:07:23,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1564438671, now seen corresponding path program 2 times [2024-06-14 12:07:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:23,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745405176] [2024-06-14 12:07:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745405176] [2024-06-14 12:07:25,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745405176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:25,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:25,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229560530] [2024-06-14 12:07:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:25,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:25,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 420 transitions, 4553 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:25,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:25,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:26,673 INFO L124 PetriNetUnfolderBase]: 3419/5577 cut-off events. [2024-06-14 12:07:26,674 INFO L125 PetriNetUnfolderBase]: For 1246744/1246764 co-relation queries the response was YES. [2024-06-14 12:07:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59474 conditions, 5577 events. 3419/5577 cut-off events. For 1246744/1246764 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34631 event pairs, 713 based on Foata normal form. 5/5559 useless extension candidates. Maximal degree in co-relation 59316. Up to 5005 conditions per place. [2024-06-14 12:07:26,757 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 379 selfloop transitions, 27 changer transitions 0/447 dead transitions. [2024-06-14 12:07:26,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 447 transitions, 5529 flow [2024-06-14 12:07:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:07:26,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 12:07:26,758 INFO L175 Difference]: Start difference. First operand has 350 places, 420 transitions, 4553 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:07:26,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 447 transitions, 5529 flow [2024-06-14 12:07:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 447 transitions, 5403 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:28,554 INFO L231 Difference]: Finished difference. Result has 352 places, 423 transitions, 4589 flow [2024-06-14 12:07:28,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4589, PETRI_PLACES=352, PETRI_TRANSITIONS=423} [2024-06-14 12:07:28,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-14 12:07:28,554 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 423 transitions, 4589 flow [2024-06-14 12:07:28,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:28,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:28,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:28,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:07:28,555 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)] === [2024-06-14 12:07:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1564450761, now seen corresponding path program 3 times [2024-06-14 12:07:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:28,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547577449] [2024-06-14 12:07:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:29,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:29,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547577449] [2024-06-14 12:07:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547577449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:29,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:29,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:29,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371449498] [2024-06-14 12:07:29,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:29,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:29,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:29,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:29,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:29,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 423 transitions, 4589 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:29,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:29,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:29,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:31,188 INFO L124 PetriNetUnfolderBase]: 3424/5590 cut-off events. [2024-06-14 12:07:31,188 INFO L125 PetriNetUnfolderBase]: For 1268965/1268973 co-relation queries the response was YES. [2024-06-14 12:07:31,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60062 conditions, 5590 events. 3424/5590 cut-off events. For 1268965/1268973 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34781 event pairs, 713 based on Foata normal form. 10/5577 useless extension candidates. Maximal degree in co-relation 59903. Up to 5000 conditions per place. [2024-06-14 12:07:31,275 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 374 selfloop transitions, 35 changer transitions 0/450 dead transitions. [2024-06-14 12:07:31,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 450 transitions, 5577 flow [2024-06-14 12:07:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:07:31,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:07:31,276 INFO L175 Difference]: Start difference. First operand has 352 places, 423 transitions, 4589 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:07:31,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 450 transitions, 5577 flow [2024-06-14 12:07:33,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 450 transitions, 5437 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:33,433 INFO L231 Difference]: Finished difference. Result has 354 places, 426 transitions, 4633 flow [2024-06-14 12:07:33,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4633, PETRI_PLACES=354, PETRI_TRANSITIONS=426} [2024-06-14 12:07:33,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-14 12:07:33,434 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 426 transitions, 4633 flow [2024-06-14 12:07:33,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:33,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:33,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:33,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:07:33,435 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)] === [2024-06-14 12:07:33,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1371609533, now seen corresponding path program 1 times [2024-06-14 12:07:33,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:33,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5049298] [2024-06-14 12:07:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:34,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5049298] [2024-06-14 12:07:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5049298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:34,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:34,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128977012] [2024-06-14 12:07:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:34,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:34,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:34,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 426 transitions, 4633 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:34,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:34,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:34,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:36,062 INFO L124 PetriNetUnfolderBase]: 3434/5604 cut-off events. [2024-06-14 12:07:36,062 INFO L125 PetriNetUnfolderBase]: For 1292000/1292008 co-relation queries the response was YES. [2024-06-14 12:07:36,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60850 conditions, 5604 events. 3434/5604 cut-off events. For 1292000/1292008 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 34879 event pairs, 712 based on Foata normal form. 4/5585 useless extension candidates. Maximal degree in co-relation 60690. Up to 5044 conditions per place. [2024-06-14 12:07:36,154 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 391 selfloop transitions, 21 changer transitions 0/453 dead transitions. [2024-06-14 12:07:36,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 453 transitions, 5655 flow [2024-06-14 12:07:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:07:36,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:07:36,155 INFO L175 Difference]: Start difference. First operand has 354 places, 426 transitions, 4633 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:07:36,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 453 transitions, 5655 flow [2024-06-14 12:07:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 453 transitions, 5493 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:38,658 INFO L231 Difference]: Finished difference. Result has 356 places, 429 transitions, 4645 flow [2024-06-14 12:07:38,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4645, PETRI_PLACES=356, PETRI_TRANSITIONS=429} [2024-06-14 12:07:38,658 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-14 12:07:38,658 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 429 transitions, 4645 flow [2024-06-14 12:07:38,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:38,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:38,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:38,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:07:38,659 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)] === [2024-06-14 12:07:38,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 50905651, now seen corresponding path program 1 times [2024-06-14 12:07:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:38,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741267792] [2024-06-14 12:07:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:39,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:39,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741267792] [2024-06-14 12:07:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741267792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:39,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073746131] [2024-06-14 12:07:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:39,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:39,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 429 transitions, 4645 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:39,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:39,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:39,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:41,239 INFO L124 PetriNetUnfolderBase]: 3455/5619 cut-off events. [2024-06-14 12:07:41,239 INFO L125 PetriNetUnfolderBase]: For 1307827/1307829 co-relation queries the response was YES. [2024-06-14 12:07:41,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61627 conditions, 5619 events. 3455/5619 cut-off events. For 1307827/1307829 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 34885 event pairs, 696 based on Foata normal form. 1/5575 useless extension candidates. Maximal degree in co-relation 61466. Up to 5075 conditions per place. [2024-06-14 12:07:41,324 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 29 changer transitions 0/455 dead transitions. [2024-06-14 12:07:41,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 455 transitions, 5651 flow [2024-06-14 12:07:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:07:41,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 12:07:41,325 INFO L175 Difference]: Start difference. First operand has 356 places, 429 transitions, 4645 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:07:41,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 455 transitions, 5651 flow [2024-06-14 12:07:43,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 455 transitions, 5501 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:43,741 INFO L231 Difference]: Finished difference. Result has 357 places, 432 transitions, 4677 flow [2024-06-14 12:07:43,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4677, PETRI_PLACES=357, PETRI_TRANSITIONS=432} [2024-06-14 12:07:43,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-14 12:07:43,741 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 432 transitions, 4677 flow [2024-06-14 12:07:43,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:43,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:43,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:43,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:07:43,742 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)] === [2024-06-14 12:07:43,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1204841499, now seen corresponding path program 3 times [2024-06-14 12:07:43,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:43,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544547393] [2024-06-14 12:07:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:43,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:44,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:44,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544547393] [2024-06-14 12:07:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544547393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:44,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420014985] [2024-06-14 12:07:44,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:44,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:44,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 432 transitions, 4677 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:44,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:44,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:44,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:46,147 INFO L124 PetriNetUnfolderBase]: 3668/5879 cut-off events. [2024-06-14 12:07:46,147 INFO L125 PetriNetUnfolderBase]: For 1339959/1339961 co-relation queries the response was YES. [2024-06-14 12:07:46,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63542 conditions, 5879 events. 3668/5879 cut-off events. For 1339959/1339961 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35831 event pairs, 742 based on Foata normal form. 4/5881 useless extension candidates. Maximal degree in co-relation 63380. Up to 5530 conditions per place. [2024-06-14 12:07:46,234 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 423 selfloop transitions, 30 changer transitions 0/458 dead transitions. [2024-06-14 12:07:46,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 458 transitions, 5758 flow [2024-06-14 12:07:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:07:46,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:07:46,235 INFO L175 Difference]: Start difference. First operand has 357 places, 432 transitions, 4677 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:07:46,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 458 transitions, 5758 flow [2024-06-14 12:07:48,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 458 transitions, 5598 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:48,813 INFO L231 Difference]: Finished difference. Result has 359 places, 435 transitions, 4689 flow [2024-06-14 12:07:48,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4689, PETRI_PLACES=359, PETRI_TRANSITIONS=435} [2024-06-14 12:07:48,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-14 12:07:48,813 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 435 transitions, 4689 flow [2024-06-14 12:07:48,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:48,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:48,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:48,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:07:48,813 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)] === [2024-06-14 12:07:48,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:48,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1204483015, now seen corresponding path program 1 times [2024-06-14 12:07:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:48,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668394779] [2024-06-14 12:07:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:49,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:49,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668394779] [2024-06-14 12:07:49,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668394779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:49,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:49,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995760593] [2024-06-14 12:07:49,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:49,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:49,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:49,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:49,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 435 transitions, 4689 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:49,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:49,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:49,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:51,357 INFO L124 PetriNetUnfolderBase]: 3473/5648 cut-off events. [2024-06-14 12:07:51,357 INFO L125 PetriNetUnfolderBase]: For 1362479/1362481 co-relation queries the response was YES. [2024-06-14 12:07:51,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62556 conditions, 5648 events. 3473/5648 cut-off events. For 1362479/1362481 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35081 event pairs, 691 based on Foata normal form. 4/5608 useless extension candidates. Maximal degree in co-relation 62393. Up to 5126 conditions per place. [2024-06-14 12:07:51,483 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 23 changer transitions 0/460 dead transitions. [2024-06-14 12:07:51,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 460 transitions, 5715 flow [2024-06-14 12:07:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:07:51,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:07:51,484 INFO L175 Difference]: Start difference. First operand has 359 places, 435 transitions, 4689 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:07:51,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 460 transitions, 5715 flow [2024-06-14 12:07:54,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 460 transitions, 5574 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:54,282 INFO L231 Difference]: Finished difference. Result has 361 places, 439 transitions, 4725 flow [2024-06-14 12:07:54,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4725, PETRI_PLACES=361, PETRI_TRANSITIONS=439} [2024-06-14 12:07:54,282 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 12:07:54,283 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 439 transitions, 4725 flow [2024-06-14 12:07:54,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:54,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:54,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:54,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:07:54,283 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)] === [2024-06-14 12:07:54,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1204483449, now seen corresponding path program 4 times [2024-06-14 12:07:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279721965] [2024-06-14 12:07:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279721965] [2024-06-14 12:07:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279721965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:55,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:55,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359324437] [2024-06-14 12:07:55,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:55,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:55,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:55,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 439 transitions, 4725 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:55,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:55,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:55,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:56,793 INFO L124 PetriNetUnfolderBase]: 3688/5905 cut-off events. [2024-06-14 12:07:56,793 INFO L125 PetriNetUnfolderBase]: For 1390577/1390579 co-relation queries the response was YES. [2024-06-14 12:07:56,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64749 conditions, 5905 events. 3688/5905 cut-off events. For 1390577/1390579 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 35986 event pairs, 741 based on Foata normal form. 4/5907 useless extension candidates. Maximal degree in co-relation 64585. Up to 5538 conditions per place. [2024-06-14 12:07:56,878 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 420 selfloop transitions, 38 changer transitions 0/463 dead transitions. [2024-06-14 12:07:56,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 463 transitions, 5856 flow [2024-06-14 12:07:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:07:56,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:07:56,879 INFO L175 Difference]: Start difference. First operand has 361 places, 439 transitions, 4725 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:07:56,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 463 transitions, 5856 flow [2024-06-14 12:07:58,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 463 transitions, 5707 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:58,710 INFO L231 Difference]: Finished difference. Result has 363 places, 442 transitions, 4792 flow [2024-06-14 12:07:58,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4576, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=363, PETRI_TRANSITIONS=442} [2024-06-14 12:07:58,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-14 12:07:58,711 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 442 transitions, 4792 flow [2024-06-14 12:07:58,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:58,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:58,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:58,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:07:58,711 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)] === [2024-06-14 12:07:58,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1908709233, now seen corresponding path program 2 times [2024-06-14 12:07:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:58,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978858995] [2024-06-14 12:07:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978858995] [2024-06-14 12:07:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978858995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:59,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739342782] [2024-06-14 12:07:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:59,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:59,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:59,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 442 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:59,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:59,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:59,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:01,502 INFO L124 PetriNetUnfolderBase]: 3491/5674 cut-off events. [2024-06-14 12:08:01,503 INFO L125 PetriNetUnfolderBase]: For 1414705/1414707 co-relation queries the response was YES. [2024-06-14 12:08:01,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64096 conditions, 5674 events. 3491/5674 cut-off events. For 1414705/1414707 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 35256 event pairs, 691 based on Foata normal form. 4/5634 useless extension candidates. Maximal degree in co-relation 63931. Up to 5135 conditions per place. [2024-06-14 12:08:01,598 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 392 selfloop transitions, 31 changer transitions 0/465 dead transitions. [2024-06-14 12:08:01,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 465 transitions, 5848 flow [2024-06-14 12:08:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:08:01,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:08:01,599 INFO L175 Difference]: Start difference. First operand has 363 places, 442 transitions, 4792 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:08:01,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 465 transitions, 5848 flow [2024-06-14 12:08:04,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 465 transitions, 5660 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:04,615 INFO L231 Difference]: Finished difference. Result has 365 places, 446 transitions, 4807 flow [2024-06-14 12:08:04,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4807, PETRI_PLACES=365, PETRI_TRANSITIONS=446} [2024-06-14 12:08:04,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-14 12:08:04,616 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 446 transitions, 4807 flow [2024-06-14 12:08:04,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:04,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:04,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:04,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:08:04,616 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)] === [2024-06-14 12:08:04,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:04,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1908708799, now seen corresponding path program 5 times [2024-06-14 12:08:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:04,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572022974] [2024-06-14 12:08:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:04,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:05,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:05,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572022974] [2024-06-14 12:08:05,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572022974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:05,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:05,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:05,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310530110] [2024-06-14 12:08:05,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:05,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:05,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:05,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 446 transitions, 4807 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:05,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:05,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:05,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:07,314 INFO L124 PetriNetUnfolderBase]: 3740/5981 cut-off events. [2024-06-14 12:08:07,314 INFO L125 PetriNetUnfolderBase]: For 1476840/1476842 co-relation queries the response was YES. [2024-06-14 12:08:07,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67553 conditions, 5981 events. 3740/5981 cut-off events. For 1476840/1476842 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36454 event pairs, 747 based on Foata normal form. 4/5983 useless extension candidates. Maximal degree in co-relation 67387. Up to 5546 conditions per place. [2024-06-14 12:08:07,419 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 408 selfloop transitions, 63 changer transitions 0/476 dead transitions. [2024-06-14 12:08:07,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 476 transitions, 6732 flow [2024-06-14 12:08:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:08:07,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:08:07,420 INFO L175 Difference]: Start difference. First operand has 365 places, 446 transitions, 4807 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:08:07,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 476 transitions, 6732 flow [2024-06-14 12:08:10,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 476 transitions, 6557 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:10,073 INFO L231 Difference]: Finished difference. Result has 367 places, 455 transitions, 5178 flow [2024-06-14 12:08:10,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5178, PETRI_PLACES=367, PETRI_TRANSITIONS=455} [2024-06-14 12:08:10,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-14 12:08:10,074 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 455 transitions, 5178 flow [2024-06-14 12:08:10,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:10,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:10,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:10,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:08:10,074 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)] === [2024-06-14 12:08:10,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:10,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1027531419, now seen corresponding path program 6 times [2024-06-14 12:08:10,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:10,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36523250] [2024-06-14 12:08:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:10,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36523250] [2024-06-14 12:08:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36523250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:10,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:10,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039233646] [2024-06-14 12:08:10,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:10,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:10,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:11,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:11,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 455 transitions, 5178 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:11,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:11,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:11,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:12,523 INFO L124 PetriNetUnfolderBase]: 3734/5971 cut-off events. [2024-06-14 12:08:12,523 INFO L125 PetriNetUnfolderBase]: For 1490736/1490738 co-relation queries the response was YES. [2024-06-14 12:08:12,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67714 conditions, 5971 events. 3734/5971 cut-off events. For 1490736/1490738 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36357 event pairs, 741 based on Foata normal form. 4/5973 useless extension candidates. Maximal degree in co-relation 67547. Up to 5541 conditions per place. [2024-06-14 12:08:12,617 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 407 selfloop transitions, 64 changer transitions 0/476 dead transitions. [2024-06-14 12:08:12,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 476 transitions, 6699 flow [2024-06-14 12:08:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:08:12,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:08:12,618 INFO L175 Difference]: Start difference. First operand has 367 places, 455 transitions, 5178 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:08:12,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 476 transitions, 6699 flow [2024-06-14 12:08:14,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 476 transitions, 6416 flow, removed 128 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:14,792 INFO L231 Difference]: Finished difference. Result has 372 places, 455 transitions, 5029 flow [2024-06-14 12:08:14,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5029, PETRI_PLACES=372, PETRI_TRANSITIONS=455} [2024-06-14 12:08:14,793 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-14 12:08:14,793 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 455 transitions, 5029 flow [2024-06-14 12:08:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:14,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:14,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:14,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:08:14,793 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)] === [2024-06-14 12:08:14,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1705898907, now seen corresponding path program 3 times [2024-06-14 12:08:14,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:14,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76133715] [2024-06-14 12:08:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:15,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:15,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76133715] [2024-06-14 12:08:15,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76133715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:15,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:15,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923157961] [2024-06-14 12:08:15,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:08:16,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 455 transitions, 5029 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:16,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:08:16,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:17,420 INFO L124 PetriNetUnfolderBase]: 3540/5751 cut-off events. [2024-06-14 12:08:17,420 INFO L125 PetriNetUnfolderBase]: For 1510067/1510069 co-relation queries the response was YES. [2024-06-14 12:08:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66553 conditions, 5751 events. 3540/5751 cut-off events. For 1510067/1510069 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35788 event pairs, 692 based on Foata normal form. 3/5710 useless extension candidates. Maximal degree in co-relation 66384. Up to 5180 conditions per place. [2024-06-14 12:08:17,518 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 392 selfloop transitions, 44 changer transitions 0/481 dead transitions. [2024-06-14 12:08:17,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 481 transitions, 6429 flow [2024-06-14 12:08:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:08:17,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:08:17,519 INFO L175 Difference]: Start difference. First operand has 372 places, 455 transitions, 5029 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:08:17,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 481 transitions, 6429 flow [2024-06-14 12:08:19,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 481 transitions, 6258 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:19,915 INFO L231 Difference]: Finished difference. Result has 374 places, 462 transitions, 5201 flow [2024-06-14 12:08:19,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5201, PETRI_PLACES=374, PETRI_TRANSITIONS=462} [2024-06-14 12:08:19,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-14 12:08:19,915 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 462 transitions, 5201 flow [2024-06-14 12:08:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:19,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:19,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:08:19,916 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:19,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1029068212, now seen corresponding path program 5 times [2024-06-14 12:08:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:19,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081897620] [2024-06-14 12:08:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:21,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081897620] [2024-06-14 12:08:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081897620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:21,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:21,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605831013] [2024-06-14 12:08:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:21,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:21,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:21,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 462 transitions, 5201 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:21,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:21,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:21,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:23,395 INFO L124 PetriNetUnfolderBase]: 3926/6314 cut-off events. [2024-06-14 12:08:23,395 INFO L125 PetriNetUnfolderBase]: For 1672451/1672453 co-relation queries the response was YES. [2024-06-14 12:08:23,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72614 conditions, 6314 events. 3926/6314 cut-off events. For 1672451/1672453 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39370 event pairs, 786 based on Foata normal form. 12/6323 useless extension candidates. Maximal degree in co-relation 72444. Up to 5236 conditions per place. [2024-06-14 12:08:23,508 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 403 selfloop transitions, 112 changer transitions 0/520 dead transitions. [2024-06-14 12:08:23,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 520 transitions, 7079 flow [2024-06-14 12:08:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 12:08:23,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-14 12:08:23,510 INFO L175 Difference]: Start difference. First operand has 374 places, 462 transitions, 5201 flow. Second operand 11 states and 225 transitions. [2024-06-14 12:08:23,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 520 transitions, 7079 flow [2024-06-14 12:08:26,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 520 transitions, 6935 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:26,337 INFO L231 Difference]: Finished difference. Result has 383 places, 471 transitions, 5574 flow [2024-06-14 12:08:26,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5574, PETRI_PLACES=383, PETRI_TRANSITIONS=471} [2024-06-14 12:08:26,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 12:08:26,337 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 471 transitions, 5574 flow [2024-06-14 12:08:26,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:26,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:26,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:26,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:08:26,338 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)] === [2024-06-14 12:08:26,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:26,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1222520274, now seen corresponding path program 6 times [2024-06-14 12:08:26,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:26,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998709245] [2024-06-14 12:08:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:26,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:27,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998709245] [2024-06-14 12:08:27,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998709245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738696471] [2024-06-14 12:08:27,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:27,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:27,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:27,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 471 transitions, 5574 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:27,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:27,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:27,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:29,851 INFO L124 PetriNetUnfolderBase]: 4036/6514 cut-off events. [2024-06-14 12:08:29,851 INFO L125 PetriNetUnfolderBase]: For 1717352/1717354 co-relation queries the response was YES. [2024-06-14 12:08:29,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75116 conditions, 6514 events. 4036/6514 cut-off events. For 1717352/1717354 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41076 event pairs, 816 based on Foata normal form. 12/6523 useless extension candidates. Maximal degree in co-relation 74942. Up to 5553 conditions per place. [2024-06-14 12:08:29,950 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 409 selfloop transitions, 108 changer transitions 0/522 dead transitions. [2024-06-14 12:08:29,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 522 transitions, 6970 flow [2024-06-14 12:08:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 12:08:29,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-14 12:08:29,951 INFO L175 Difference]: Start difference. First operand has 383 places, 471 transitions, 5574 flow. Second operand 11 states and 222 transitions. [2024-06-14 12:08:29,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 522 transitions, 6970 flow [2024-06-14 12:08:33,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 522 transitions, 6819 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:33,012 INFO L231 Difference]: Finished difference. Result has 391 places, 476 transitions, 5790 flow [2024-06-14 12:08:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5790, PETRI_PLACES=391, PETRI_TRANSITIONS=476} [2024-06-14 12:08:33,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-14 12:08:33,012 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 476 transitions, 5790 flow [2024-06-14 12:08:33,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:33,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:33,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:08:33,013 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1028808742, now seen corresponding path program 7 times [2024-06-14 12:08:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:33,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481703061] [2024-06-14 12:08:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:34,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481703061] [2024-06-14 12:08:34,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481703061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:34,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748304273] [2024-06-14 12:08:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:34,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:34,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 476 transitions, 5790 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:34,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:34,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:34,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:36,345 INFO L124 PetriNetUnfolderBase]: 4016/6492 cut-off events. [2024-06-14 12:08:36,345 INFO L125 PetriNetUnfolderBase]: For 1675332/1675334 co-relation queries the response was YES. [2024-06-14 12:08:36,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73577 conditions, 6492 events. 4016/6492 cut-off events. For 1675332/1675334 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41050 event pairs, 807 based on Foata normal form. 12/6501 useless extension candidates. Maximal degree in co-relation 73400. Up to 5521 conditions per place. [2024-06-14 12:08:36,462 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 405 selfloop transitions, 112 changer transitions 0/522 dead transitions. [2024-06-14 12:08:36,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 522 transitions, 7051 flow [2024-06-14 12:08:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 12:08:36,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-14 12:08:36,463 INFO L175 Difference]: Start difference. First operand has 391 places, 476 transitions, 5790 flow. Second operand 11 states and 221 transitions. [2024-06-14 12:08:36,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 522 transitions, 7051 flow [2024-06-14 12:08:39,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 522 transitions, 6717 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:39,359 INFO L231 Difference]: Finished difference. Result has 395 places, 476 transitions, 5686 flow [2024-06-14 12:08:39,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5456, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5686, PETRI_PLACES=395, PETRI_TRANSITIONS=476} [2024-06-14 12:08:39,359 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-14 12:08:39,359 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 476 transitions, 5686 flow [2024-06-14 12:08:39,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:39,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:39,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:39,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:08:39,360 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:39,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1803720712, now seen corresponding path program 8 times [2024-06-14 12:08:39,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:39,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332298569] [2024-06-14 12:08:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:39,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:40,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332298569] [2024-06-14 12:08:40,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332298569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:40,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:40,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:40,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694998322] [2024-06-14 12:08:40,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:40,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:40,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:40,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 476 transitions, 5686 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:40,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:40,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:40,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:42,809 INFO L124 PetriNetUnfolderBase]: 4098/6644 cut-off events. [2024-06-14 12:08:42,810 INFO L125 PetriNetUnfolderBase]: For 1697003/1697005 co-relation queries the response was YES. [2024-06-14 12:08:42,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74308 conditions, 6644 events. 4098/6644 cut-off events. For 1697003/1697005 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42366 event pairs, 832 based on Foata normal form. 12/6653 useless extension candidates. Maximal degree in co-relation 74131. Up to 5663 conditions per place. [2024-06-14 12:08:42,920 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 412 selfloop transitions, 107 changer transitions 0/524 dead transitions. [2024-06-14 12:08:42,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 524 transitions, 7063 flow [2024-06-14 12:08:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 12:08:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-14 12:08:42,921 INFO L175 Difference]: Start difference. First operand has 395 places, 476 transitions, 5686 flow. Second operand 11 states and 224 transitions. [2024-06-14 12:08:42,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 524 transitions, 7063 flow [2024-06-14 12:08:45,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 524 transitions, 6820 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 12:08:45,948 INFO L231 Difference]: Finished difference. Result has 398 places, 478 transitions, 5785 flow [2024-06-14 12:08:45,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5785, PETRI_PLACES=398, PETRI_TRANSITIONS=478} [2024-06-14 12:08:45,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-14 12:08:45,948 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 478 transitions, 5785 flow [2024-06-14 12:08:45,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:45,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:45,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:45,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:08:45,949 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:45,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1038005512, now seen corresponding path program 9 times [2024-06-14 12:08:45,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:45,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43757370] [2024-06-14 12:08:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:45,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43757370] [2024-06-14 12:08:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43757370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:47,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410931615] [2024-06-14 12:08:47,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:47,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:47,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:47,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:47,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:47,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 478 transitions, 5785 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:47,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:47,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:47,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:49,463 INFO L124 PetriNetUnfolderBase]: 4200/6838 cut-off events. [2024-06-14 12:08:49,463 INFO L125 PetriNetUnfolderBase]: For 1807457/1807459 co-relation queries the response was YES. [2024-06-14 12:08:49,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77616 conditions, 6838 events. 4200/6838 cut-off events. For 1807457/1807459 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44044 event pairs, 858 based on Foata normal form. 12/6847 useless extension candidates. Maximal degree in co-relation 77437. Up to 4361 conditions per place. [2024-06-14 12:08:49,571 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 384 selfloop transitions, 141 changer transitions 0/530 dead transitions. [2024-06-14 12:08:49,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 530 transitions, 7640 flow [2024-06-14 12:08:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 12:08:49,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-14 12:08:49,573 INFO L175 Difference]: Start difference. First operand has 398 places, 478 transitions, 5785 flow. Second operand 11 states and 224 transitions. [2024-06-14 12:08:49,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 530 transitions, 7640 flow [2024-06-14 12:08:52,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 530 transitions, 7326 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:52,522 INFO L231 Difference]: Finished difference. Result has 402 places, 480 transitions, 5945 flow [2024-06-14 12:08:52,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5945, PETRI_PLACES=402, PETRI_TRANSITIONS=480} [2024-06-14 12:08:52,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-14 12:08:52,522 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 480 transitions, 5945 flow [2024-06-14 12:08:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:52,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:52,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:08:52,523 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:52,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1796311402, now seen corresponding path program 10 times [2024-06-14 12:08:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135069458] [2024-06-14 12:08:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:53,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:53,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135069458] [2024-06-14 12:08:53,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135069458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:53,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:53,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932209798] [2024-06-14 12:08:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:53,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:53,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:08:53,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 480 transitions, 5945 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:53,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:53,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:08:53,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:55,990 INFO L124 PetriNetUnfolderBase]: 4180/6806 cut-off events. [2024-06-14 12:08:55,990 INFO L125 PetriNetUnfolderBase]: For 1764394/1764396 co-relation queries the response was YES. [2024-06-14 12:08:56,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76092 conditions, 6806 events. 4180/6806 cut-off events. For 1764394/1764396 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43882 event pairs, 857 based on Foata normal form. 12/6815 useless extension candidates. Maximal degree in co-relation 75912. Up to 5516 conditions per place. [2024-06-14 12:08:56,115 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 409 selfloop transitions, 113 changer transitions 0/527 dead transitions. [2024-06-14 12:08:56,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 527 transitions, 7218 flow [2024-06-14 12:08:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 12:08:56,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-14 12:08:56,117 INFO L175 Difference]: Start difference. First operand has 402 places, 480 transitions, 5945 flow. Second operand 11 states and 224 transitions. [2024-06-14 12:08:56,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 527 transitions, 7218 flow [2024-06-14 12:08:59,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 527 transitions, 6975 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:59,744 INFO L231 Difference]: Finished difference. Result has 406 places, 480 transitions, 5934 flow [2024-06-14 12:08:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5934, PETRI_PLACES=406, PETRI_TRANSITIONS=480} [2024-06-14 12:08:59,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-14 12:08:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 480 transitions, 5934 flow [2024-06-14 12:08:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:08:59,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:59,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:59,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:08:59,745 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)] === [2024-06-14 12:08:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1908940431, now seen corresponding path program 4 times [2024-06-14 12:08:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448467593] [2024-06-14 12:08:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448467593] [2024-06-14 12:09:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448467593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:00,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662645479] [2024-06-14 12:09:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:00,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:01,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:01,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 480 transitions, 5934 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:01,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:01,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:01,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:02,558 INFO L124 PetriNetUnfolderBase]: 3902/6478 cut-off events. [2024-06-14 12:09:02,559 INFO L125 PetriNetUnfolderBase]: For 1741208/1741216 co-relation queries the response was YES. [2024-06-14 12:09:02,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74802 conditions, 6478 events. 3902/6478 cut-off events. For 1741208/1741216 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42826 event pairs, 813 based on Foata normal form. 10/6444 useless extension candidates. Maximal degree in co-relation 74620. Up to 5784 conditions per place. [2024-06-14 12:09:02,672 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 410 selfloop transitions, 54 changer transitions 0/505 dead transitions. [2024-06-14 12:09:02,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 505 transitions, 7397 flow [2024-06-14 12:09:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:09:02,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:09:02,673 INFO L175 Difference]: Start difference. First operand has 406 places, 480 transitions, 5934 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:09:02,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 505 transitions, 7397 flow [2024-06-14 12:09:06,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 505 transitions, 6972 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-14 12:09:06,538 INFO L231 Difference]: Finished difference. Result has 404 places, 486 transitions, 5861 flow [2024-06-14 12:09:06,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=404, PETRI_TRANSITIONS=486} [2024-06-14 12:09:06,538 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 359 predicate places. [2024-06-14 12:09:06,539 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 486 transitions, 5861 flow [2024-06-14 12:09:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:06,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:06,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:06,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:09:06,539 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)] === [2024-06-14 12:09:06,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1908940865, now seen corresponding path program 2 times [2024-06-14 12:09:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270901062] [2024-06-14 12:09:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:07,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270901062] [2024-06-14 12:09:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270901062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:07,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:07,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121734533] [2024-06-14 12:09:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:07,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:07,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:07,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 486 transitions, 5861 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:07,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:07,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:07,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:09,593 INFO L124 PetriNetUnfolderBase]: 3952/6547 cut-off events. [2024-06-14 12:09:09,594 INFO L125 PetriNetUnfolderBase]: For 1813746/1813754 co-relation queries the response was YES. [2024-06-14 12:09:09,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76305 conditions, 6547 events. 3952/6547 cut-off events. For 1813746/1813754 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43292 event pairs, 811 based on Foata normal form. 4/6507 useless extension candidates. Maximal degree in co-relation 76123. Up to 5862 conditions per place. [2024-06-14 12:09:09,708 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 434 selfloop transitions, 43 changer transitions 0/518 dead transitions. [2024-06-14 12:09:09,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 518 transitions, 7846 flow [2024-06-14 12:09:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:09:09,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:09:09,709 INFO L175 Difference]: Start difference. First operand has 404 places, 486 transitions, 5861 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:09:09,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 518 transitions, 7846 flow [2024-06-14 12:09:13,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 518 transitions, 7695 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:13,060 INFO L231 Difference]: Finished difference. Result has 409 places, 496 transitions, 6260 flow [2024-06-14 12:09:13,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5710, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6260, PETRI_PLACES=409, PETRI_TRANSITIONS=496} [2024-06-14 12:09:13,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-14 12:09:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 496 transitions, 6260 flow [2024-06-14 12:09:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:13,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:13,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:13,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:09:13,061 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)] === [2024-06-14 12:09:13,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1908955311, now seen corresponding path program 1 times [2024-06-14 12:09:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:13,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249020817] [2024-06-14 12:09:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:14,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249020817] [2024-06-14 12:09:14,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249020817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:14,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:14,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:14,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479844656] [2024-06-14 12:09:14,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:14,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:14,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:09:14,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 496 transitions, 6260 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:14,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:14,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:09:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:16,264 INFO L124 PetriNetUnfolderBase]: 3720/6251 cut-off events. [2024-06-14 12:09:16,265 INFO L125 PetriNetUnfolderBase]: For 1820559/1820587 co-relation queries the response was YES. [2024-06-14 12:09:16,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75082 conditions, 6251 events. 3720/6251 cut-off events. For 1820559/1820587 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41923 event pairs, 762 based on Foata normal form. 3/6176 useless extension candidates. Maximal degree in co-relation 74897. Up to 5431 conditions per place. [2024-06-14 12:09:16,377 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 19 changer transitions 0/515 dead transitions. [2024-06-14 12:09:16,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 515 transitions, 7260 flow [2024-06-14 12:09:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:09:16,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 12:09:16,378 INFO L175 Difference]: Start difference. First operand has 409 places, 496 transitions, 6260 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:09:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 515 transitions, 7260 flow [2024-06-14 12:09:19,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 515 transitions, 7085 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:19,676 INFO L231 Difference]: Finished difference. Result has 413 places, 498 transitions, 6225 flow [2024-06-14 12:09:19,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6087, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6225, PETRI_PLACES=413, PETRI_TRANSITIONS=498} [2024-06-14 12:09:19,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-14 12:09:19,676 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 498 transitions, 6225 flow [2024-06-14 12:09:19,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:19,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:19,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:19,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:09:19,677 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)] === [2024-06-14 12:09:19,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1908954815, now seen corresponding path program 3 times [2024-06-14 12:09:19,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:19,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196415816] [2024-06-14 12:09:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:19,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:20,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196415816] [2024-06-14 12:09:20,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196415816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:20,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:20,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156336454] [2024-06-14 12:09:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:20,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:20,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:20,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:20,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 498 transitions, 6225 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:20,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:20,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:22,623 INFO L124 PetriNetUnfolderBase]: 3943/6535 cut-off events. [2024-06-14 12:09:22,623 INFO L125 PetriNetUnfolderBase]: For 1839431/1839439 co-relation queries the response was YES. [2024-06-14 12:09:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76307 conditions, 6535 events. 3943/6535 cut-off events. For 1839431/1839439 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43206 event pairs, 812 based on Foata normal form. 4/6495 useless extension candidates. Maximal degree in co-relation 76120. Up to 5855 conditions per place. [2024-06-14 12:09:22,737 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 430 selfloop transitions, 47 changer transitions 0/518 dead transitions. [2024-06-14 12:09:22,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 518 transitions, 7512 flow [2024-06-14 12:09:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:09:22,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:09:22,738 INFO L175 Difference]: Start difference. First operand has 413 places, 498 transitions, 6225 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:09:22,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 518 transitions, 7512 flow [2024-06-14 12:09:26,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 518 transitions, 7272 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:26,093 INFO L231 Difference]: Finished difference. Result has 416 places, 498 transitions, 6086 flow [2024-06-14 12:09:26,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5985, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6086, PETRI_PLACES=416, PETRI_TRANSITIONS=498} [2024-06-14 12:09:26,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-14 12:09:26,094 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 498 transitions, 6086 flow [2024-06-14 12:09:26,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:26,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:26,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:26,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:09:26,094 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)] === [2024-06-14 12:09:26,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1027523917, now seen corresponding path program 5 times [2024-06-14 12:09:26,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:26,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842637239] [2024-06-14 12:09:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:26,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:27,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842637239] [2024-06-14 12:09:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842637239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:27,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:27,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553298019] [2024-06-14 12:09:27,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:27,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:27,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:27,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 498 transitions, 6086 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:27,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:27,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:27,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:29,009 INFO L124 PetriNetUnfolderBase]: 3946/6541 cut-off events. [2024-06-14 12:09:29,009 INFO L125 PetriNetUnfolderBase]: For 1866579/1866607 co-relation queries the response was YES. [2024-06-14 12:09:29,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76389 conditions, 6541 events. 3946/6541 cut-off events. For 1866579/1866607 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43244 event pairs, 812 based on Foata normal form. 14/6510 useless extension candidates. Maximal degree in co-relation 76201. Up to 5869 conditions per place. [2024-06-14 12:09:29,135 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 440 selfloop transitions, 39 changer transitions 0/520 dead transitions. [2024-06-14 12:09:29,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 520 transitions, 7475 flow [2024-06-14 12:09:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:09:29,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:09:29,136 INFO L175 Difference]: Start difference. First operand has 416 places, 498 transitions, 6086 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:09:29,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 520 transitions, 7475 flow [2024-06-14 12:09:33,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 520 transitions, 7377 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:33,095 INFO L231 Difference]: Finished difference. Result has 418 places, 501 transitions, 6192 flow [2024-06-14 12:09:33,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6192, PETRI_PLACES=418, PETRI_TRANSITIONS=501} [2024-06-14 12:09:33,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-14 12:09:33,096 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 501 transitions, 6192 flow [2024-06-14 12:09:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:33,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:33,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:33,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:09:33,096 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)] === [2024-06-14 12:09:33,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1908537245, now seen corresponding path program 4 times [2024-06-14 12:09:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808066263] [2024-06-14 12:09:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:34,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808066263] [2024-06-14 12:09:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808066263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:34,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56778254] [2024-06-14 12:09:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:34,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:34,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 501 transitions, 6192 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:34,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:34,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:34,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:36,317 INFO L124 PetriNetUnfolderBase]: 3943/6537 cut-off events. [2024-06-14 12:09:36,317 INFO L125 PetriNetUnfolderBase]: For 1876612/1876636 co-relation queries the response was YES. [2024-06-14 12:09:36,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76348 conditions, 6537 events. 3943/6537 cut-off events. For 1876612/1876636 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43260 event pairs, 811 based on Foata normal form. 1/6493 useless extension candidates. Maximal degree in co-relation 76159. Up to 5897 conditions per place. [2024-06-14 12:09:36,423 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 454 selfloop transitions, 26 changer transitions 0/521 dead transitions. [2024-06-14 12:09:36,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 521 transitions, 7319 flow [2024-06-14 12:09:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:09:36,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:09:36,424 INFO L175 Difference]: Start difference. First operand has 418 places, 501 transitions, 6192 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:09:36,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 521 transitions, 7319 flow [2024-06-14 12:09:39,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 521 transitions, 7111 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:39,709 INFO L231 Difference]: Finished difference. Result has 420 places, 504 transitions, 6170 flow [2024-06-14 12:09:39,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6170, PETRI_PLACES=420, PETRI_TRANSITIONS=504} [2024-06-14 12:09:39,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-14 12:09:39,709 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 504 transitions, 6170 flow [2024-06-14 12:09:39,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:39,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:39,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:39,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:09:39,709 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)] === [2024-06-14 12:09:39,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2141197773, now seen corresponding path program 6 times [2024-06-14 12:09:39,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:39,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968902933] [2024-06-14 12:09:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:39,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:40,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968902933] [2024-06-14 12:09:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968902933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:40,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:40,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:40,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228481351] [2024-06-14 12:09:40,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:40,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:40,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:40,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:40,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 504 transitions, 6170 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:40,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:40,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:40,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:42,755 INFO L124 PetriNetUnfolderBase]: 3939/6530 cut-off events. [2024-06-14 12:09:42,756 INFO L125 PetriNetUnfolderBase]: For 1889299/1889323 co-relation queries the response was YES. [2024-06-14 12:09:42,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76165 conditions, 6530 events. 3939/6530 cut-off events. For 1889299/1889323 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43200 event pairs, 810 based on Foata normal form. 9/6495 useless extension candidates. Maximal degree in co-relation 75975. Up to 5868 conditions per place. [2024-06-14 12:09:42,863 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 447 selfloop transitions, 34 changer transitions 0/522 dead transitions. [2024-06-14 12:09:42,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 522 transitions, 7181 flow [2024-06-14 12:09:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:09:42,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:09:42,864 INFO L175 Difference]: Start difference. First operand has 420 places, 504 transitions, 6170 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:09:42,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 522 transitions, 7181 flow [2024-06-14 12:09:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 522 transitions, 6931 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:46,880 INFO L231 Difference]: Finished difference. Result has 422 places, 504 transitions, 5994 flow [2024-06-14 12:09:46,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5994, PETRI_PLACES=422, PETRI_TRANSITIONS=504} [2024-06-14 12:09:46,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 377 predicate places. [2024-06-14 12:09:46,880 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 504 transitions, 5994 flow [2024-06-14 12:09:46,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:46,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:46,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:46,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:09:46,881 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:46,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1070755399, now seen corresponding path program 2 times [2024-06-14 12:09:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:46,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918715525] [2024-06-14 12:09:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:47,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:47,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918715525] [2024-06-14 12:09:47,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918715525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:47,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:47,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:47,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169000768] [2024-06-14 12:09:47,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:47,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:47,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 504 transitions, 5994 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:47,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:47,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:49,669 INFO L124 PetriNetUnfolderBase]: 4042/6656 cut-off events. [2024-06-14 12:09:49,669 INFO L125 PetriNetUnfolderBase]: For 1906066/1906071 co-relation queries the response was YES. [2024-06-14 12:09:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76979 conditions, 6656 events. 4042/6656 cut-off events. For 1906066/1906071 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43738 event pairs, 826 based on Foata normal form. 5/6616 useless extension candidates. Maximal degree in co-relation 76788. Up to 6000 conditions per place. [2024-06-14 12:09:49,787 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 448 selfloop transitions, 30 changer transitions 0/527 dead transitions. [2024-06-14 12:09:49,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 527 transitions, 7139 flow [2024-06-14 12:09:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:09:49,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:09:49,788 INFO L175 Difference]: Start difference. First operand has 422 places, 504 transitions, 5994 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:09:49,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 527 transitions, 7139 flow [2024-06-14 12:09:54,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 527 transitions, 7059 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:09:54,315 INFO L231 Difference]: Finished difference. Result has 422 places, 507 transitions, 6122 flow [2024-06-14 12:09:54,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6122, PETRI_PLACES=422, PETRI_TRANSITIONS=507} [2024-06-14 12:09:54,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 377 predicate places. [2024-06-14 12:09:54,316 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 507 transitions, 6122 flow [2024-06-14 12:09:54,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:54,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:54,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:54,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:09:54,316 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:54,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1361144179, now seen corresponding path program 3 times [2024-06-14 12:09:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:54,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034647511] [2024-06-14 12:09:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:54,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:55,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034647511] [2024-06-14 12:09:55,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034647511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:55,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:55,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272086913] [2024-06-14 12:09:55,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:55,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:55,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 507 transitions, 6122 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:55,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:55,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:55,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:57,071 INFO L124 PetriNetUnfolderBase]: 4047/6658 cut-off events. [2024-06-14 12:09:57,072 INFO L125 PetriNetUnfolderBase]: For 1939802/1939807 co-relation queries the response was YES. [2024-06-14 12:09:57,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77722 conditions, 6658 events. 4047/6658 cut-off events. For 1939802/1939807 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43685 event pairs, 826 based on Foata normal form. 5/6618 useless extension candidates. Maximal degree in co-relation 77530. Up to 5994 conditions per place. [2024-06-14 12:09:57,190 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 441 selfloop transitions, 41 changer transitions 0/531 dead transitions. [2024-06-14 12:09:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 531 transitions, 7685 flow [2024-06-14 12:09:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:09:57,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:09:57,191 INFO L175 Difference]: Start difference. First operand has 422 places, 507 transitions, 6122 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:09:57,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 531 transitions, 7685 flow [2024-06-14 12:10:01,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 531 transitions, 7499 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:01,424 INFO L231 Difference]: Finished difference. Result has 424 places, 513 transitions, 6314 flow [2024-06-14 12:10:01,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6314, PETRI_PLACES=424, PETRI_TRANSITIONS=513} [2024-06-14 12:10:01,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-14 12:10:01,425 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 513 transitions, 6314 flow [2024-06-14 12:10:01,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:01,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:01,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:01,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:10:01,425 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:01,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1062473501, now seen corresponding path program 7 times [2024-06-14 12:10:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141608768] [2024-06-14 12:10:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:02,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141608768] [2024-06-14 12:10:02,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141608768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:02,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:02,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:02,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218395468] [2024-06-14 12:10:02,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:02,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:02,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:02,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:10:02,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 513 transitions, 6314 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:02,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:02,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:10:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:04,080 INFO L124 PetriNetUnfolderBase]: 4252/6912 cut-off events. [2024-06-14 12:10:04,080 INFO L125 PetriNetUnfolderBase]: For 1966440/1966445 co-relation queries the response was YES. [2024-06-14 12:10:04,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79212 conditions, 6912 events. 4252/6912 cut-off events. For 1966440/1966445 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44633 event pairs, 882 based on Foata normal form. 4/6913 useless extension candidates. Maximal degree in co-relation 79019. Up to 6477 conditions per place. [2024-06-14 12:10:04,204 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 498 selfloop transitions, 30 changer transitions 0/533 dead transitions. [2024-06-14 12:10:04,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 533 transitions, 7442 flow [2024-06-14 12:10:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:10:04,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:10:04,205 INFO L175 Difference]: Start difference. First operand has 424 places, 513 transitions, 6314 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:10:04,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 533 transitions, 7442 flow [2024-06-14 12:10:08,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 533 transitions, 7168 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:08,802 INFO L231 Difference]: Finished difference. Result has 428 places, 513 transitions, 6106 flow [2024-06-14 12:10:08,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6106, PETRI_PLACES=428, PETRI_TRANSITIONS=513} [2024-06-14 12:10:08,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-14 12:10:08,802 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 513 transitions, 6106 flow [2024-06-14 12:10:08,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:08,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:08,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:08,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:10:08,803 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:08,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1462324459, now seen corresponding path program 4 times [2024-06-14 12:10:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:08,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996934121] [2024-06-14 12:10:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996934121] [2024-06-14 12:10:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996934121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:09,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:09,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:09,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589794089] [2024-06-14 12:10:09,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:09,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:09,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:10:09,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 513 transitions, 6106 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:09,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:09,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:10:09,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:11,616 INFO L124 PetriNetUnfolderBase]: 4038/6661 cut-off events. [2024-06-14 12:10:11,616 INFO L125 PetriNetUnfolderBase]: For 1968046/1968051 co-relation queries the response was YES. [2024-06-14 12:10:11,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77665 conditions, 6661 events. 4038/6661 cut-off events. For 1968046/1968051 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43886 event pairs, 835 based on Foata normal form. 5/6621 useless extension candidates. Maximal degree in co-relation 77470. Up to 5997 conditions per place. [2024-06-14 12:10:11,743 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 455 selfloop transitions, 29 changer transitions 0/533 dead transitions. [2024-06-14 12:10:11,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 533 transitions, 7127 flow [2024-06-14 12:10:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:10:11,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:10:11,744 INFO L175 Difference]: Start difference. First operand has 428 places, 513 transitions, 6106 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:10:11,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 533 transitions, 7127 flow [2024-06-14 12:10:17,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 533 transitions, 6887 flow, removed 52 selfloop flow, removed 11 redundant places. [2024-06-14 12:10:17,205 INFO L231 Difference]: Finished difference. Result has 425 places, 513 transitions, 5930 flow [2024-06-14 12:10:17,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5930, PETRI_PLACES=425, PETRI_TRANSITIONS=513} [2024-06-14 12:10:17,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-14 12:10:17,205 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 513 transitions, 5930 flow [2024-06-14 12:10:17,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:17,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:17,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:17,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:10:17,206 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)] === [2024-06-14 12:10:17,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1062831551, now seen corresponding path program 8 times [2024-06-14 12:10:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546438813] [2024-06-14 12:10:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546438813] [2024-06-14 12:10:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546438813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:18,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:18,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:18,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189392294] [2024-06-14 12:10:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:18,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:10:18,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 513 transitions, 5930 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:18,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:18,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:10:18,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:19,893 INFO L124 PetriNetUnfolderBase]: 4243/6900 cut-off events. [2024-06-14 12:10:19,893 INFO L125 PetriNetUnfolderBase]: For 1988165/1988170 co-relation queries the response was YES. [2024-06-14 12:10:19,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78620 conditions, 6900 events. 4243/6900 cut-off events. For 1988165/1988170 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44500 event pairs, 879 based on Foata normal form. 4/6901 useless extension candidates. Maximal degree in co-relation 78424. Up to 6451 conditions per place. [2024-06-14 12:10:20,017 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 491 selfloop transitions, 35 changer transitions 0/531 dead transitions. [2024-06-14 12:10:20,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 531 transitions, 7070 flow [2024-06-14 12:10:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:10:20,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:10:20,018 INFO L175 Difference]: Start difference. First operand has 425 places, 513 transitions, 5930 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:10:20,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 531 transitions, 7070 flow [2024-06-14 12:10:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 531 transitions, 6900 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:25,106 INFO L231 Difference]: Finished difference. Result has 426 places, 513 transitions, 5836 flow [2024-06-14 12:10:25,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5760, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5836, PETRI_PLACES=426, PETRI_TRANSITIONS=513} [2024-06-14 12:10:25,106 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 12:10:25,106 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 513 transitions, 5836 flow [2024-06-14 12:10:25,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:25,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:25,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:25,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:10:25,107 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)] === [2024-06-14 12:10:25,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 734316439, now seen corresponding path program 4 times [2024-06-14 12:10:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664743918] [2024-06-14 12:10:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:26,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664743918] [2024-06-14 12:10:26,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664743918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:26,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:26,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859363999] [2024-06-14 12:10:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:26,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:10:26,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 513 transitions, 5836 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:26,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:26,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:10:26,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:28,045 INFO L124 PetriNetUnfolderBase]: 4024/6635 cut-off events. [2024-06-14 12:10:28,046 INFO L125 PetriNetUnfolderBase]: For 1990165/1990170 co-relation queries the response was YES. [2024-06-14 12:10:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76959 conditions, 6635 events. 4024/6635 cut-off events. For 1990165/1990170 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 43672 event pairs, 822 based on Foata normal form. 6/6596 useless extension candidates. Maximal degree in co-relation 76762. Up to 6010 conditions per place. [2024-06-14 12:10:28,165 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 459 selfloop transitions, 23 changer transitions 0/531 dead transitions. [2024-06-14 12:10:28,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 531 transitions, 6869 flow [2024-06-14 12:10:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:10:28,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:10:28,166 INFO L175 Difference]: Start difference. First operand has 426 places, 513 transitions, 5836 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:10:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 531 transitions, 6869 flow [2024-06-14 12:10:33,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 531 transitions, 6673 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 12:10:33,047 INFO L231 Difference]: Finished difference. Result has 426 places, 513 transitions, 5693 flow [2024-06-14 12:10:33,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5693, PETRI_PLACES=426, PETRI_TRANSITIONS=513} [2024-06-14 12:10:33,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 12:10:33,048 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 513 transitions, 5693 flow [2024-06-14 12:10:33,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:33,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:33,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:10:33,048 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)] === [2024-06-14 12:10:33,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1755752473, now seen corresponding path program 9 times [2024-06-14 12:10:33,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:33,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701232095] [2024-06-14 12:10:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:33,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:33,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:33,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701232095] [2024-06-14 12:10:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701232095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:33,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983445291] [2024-06-14 12:10:33,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:34,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:10:34,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 513 transitions, 5693 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:34,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:34,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:10:34,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:35,732 INFO L124 PetriNetUnfolderBase]: 4247/6906 cut-off events. [2024-06-14 12:10:35,732 INFO L125 PetriNetUnfolderBase]: For 2022469/2022474 co-relation queries the response was YES. [2024-06-14 12:10:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78605 conditions, 6906 events. 4247/6906 cut-off events. For 2022469/2022474 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44605 event pairs, 879 based on Foata normal form. 4/6907 useless extension candidates. Maximal degree in co-relation 78407. Up to 6409 conditions per place. [2024-06-14 12:10:35,857 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 474 selfloop transitions, 53 changer transitions 0/532 dead transitions. [2024-06-14 12:10:35,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 532 transitions, 6999 flow [2024-06-14 12:10:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:10:35,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:10:35,858 INFO L175 Difference]: Start difference. First operand has 426 places, 513 transitions, 5693 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:10:35,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 532 transitions, 6999 flow [2024-06-14 12:10:41,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 532 transitions, 6913 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:41,362 INFO L231 Difference]: Finished difference. Result has 427 places, 516 transitions, 5873 flow [2024-06-14 12:10:41,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5607, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5873, PETRI_PLACES=427, PETRI_TRANSITIONS=516} [2024-06-14 12:10:41,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-14 12:10:41,363 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 516 transitions, 5873 flow [2024-06-14 12:10:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:10:41,363 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)] === [2024-06-14 12:10:41,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:41,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1476138865, now seen corresponding path program 5 times [2024-06-14 12:10:41,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:41,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756468854] [2024-06-14 12:10:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:42,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:42,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756468854] [2024-06-14 12:10:42,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756468854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:42,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:42,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:42,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349786492] [2024-06-14 12:10:42,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:42,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:42,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:42,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:10:42,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 516 transitions, 5873 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:42,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:42,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:10:42,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:44,275 INFO L124 PetriNetUnfolderBase]: 4040/6663 cut-off events. [2024-06-14 12:10:44,275 INFO L125 PetriNetUnfolderBase]: For 2051154/2051159 co-relation queries the response was YES. [2024-06-14 12:10:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78093 conditions, 6663 events. 4040/6663 cut-off events. For 2051154/2051159 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43921 event pairs, 818 based on Foata normal form. 6/6624 useless extension candidates. Maximal degree in co-relation 77894. Up to 6014 conditions per place. [2024-06-14 12:10:44,394 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 455 selfloop transitions, 31 changer transitions 0/536 dead transitions. [2024-06-14 12:10:44,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 536 transitions, 7088 flow [2024-06-14 12:10:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:10:44,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:10:44,395 INFO L175 Difference]: Start difference. First operand has 427 places, 516 transitions, 5873 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:10:44,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 536 transitions, 7088 flow [2024-06-14 12:10:49,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 536 transitions, 6854 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:49,168 INFO L231 Difference]: Finished difference. Result has 429 places, 520 transitions, 5874 flow [2024-06-14 12:10:49,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5874, PETRI_PLACES=429, PETRI_TRANSITIONS=520} [2024-06-14 12:10:49,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-14 12:10:49,169 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 520 transitions, 5874 flow [2024-06-14 12:10:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:49,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:49,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:49,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:10:49,169 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)] === [2024-06-14 12:10:49,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1756228137, now seen corresponding path program 6 times [2024-06-14 12:10:49,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:49,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109085153] [2024-06-14 12:10:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:49,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:50,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:50,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109085153] [2024-06-14 12:10:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109085153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:50,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:50,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43019155] [2024-06-14 12:10:50,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:50,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:50,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:50,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:10:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 520 transitions, 5874 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:10:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:52,014 INFO L124 PetriNetUnfolderBase]: 4050/6679 cut-off events. [2024-06-14 12:10:52,015 INFO L125 PetriNetUnfolderBase]: For 2083839/2083844 co-relation queries the response was YES. [2024-06-14 12:10:52,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78972 conditions, 6679 events. 4050/6679 cut-off events. For 2083839/2083844 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 44023 event pairs, 818 based on Foata normal form. 6/6640 useless extension candidates. Maximal degree in co-relation 78772. Up to 6004 conditions per place. [2024-06-14 12:10:52,142 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 447 selfloop transitions, 46 changer transitions 0/543 dead transitions. [2024-06-14 12:10:52,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 543 transitions, 7156 flow [2024-06-14 12:10:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:10:52,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:10:52,144 INFO L175 Difference]: Start difference. First operand has 429 places, 520 transitions, 5874 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:10:52,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 543 transitions, 7156 flow [2024-06-14 12:10:57,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 543 transitions, 6949 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:57,080 INFO L231 Difference]: Finished difference. Result has 432 places, 528 transitions, 6033 flow [2024-06-14 12:10:57,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6033, PETRI_PLACES=432, PETRI_TRANSITIONS=528} [2024-06-14 12:10:57,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-14 12:10:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 528 transitions, 6033 flow [2024-06-14 12:10:57,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:57,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:57,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:10:57,081 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)] === [2024-06-14 12:10:57,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1754918379, now seen corresponding path program 7 times [2024-06-14 12:10:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:57,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835418693] [2024-06-14 12:10:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835418693] [2024-06-14 12:10:58,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835418693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:58,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:58,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:58,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268904348] [2024-06-14 12:10:58,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:58,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:10:58,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 528 transitions, 6033 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:58,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:58,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:10:58,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:00,091 INFO L124 PetriNetUnfolderBase]: 4058/6693 cut-off events. [2024-06-14 12:11:00,091 INFO L125 PetriNetUnfolderBase]: For 2122097/2122104 co-relation queries the response was YES. [2024-06-14 12:11:00,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79967 conditions, 6693 events. 4058/6693 cut-off events. For 2122097/2122104 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44113 event pairs, 824 based on Foata normal form. 8/6656 useless extension candidates. Maximal degree in co-relation 79765. Up to 6007 conditions per place. [2024-06-14 12:11:00,203 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 448 selfloop transitions, 48 changer transitions 0/546 dead transitions. [2024-06-14 12:11:00,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 546 transitions, 7312 flow [2024-06-14 12:11:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:11:00,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:11:00,204 INFO L175 Difference]: Start difference. First operand has 432 places, 528 transitions, 6033 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:11:00,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 546 transitions, 7312 flow [2024-06-14 12:11:05,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 546 transitions, 7098 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:05,185 INFO L231 Difference]: Finished difference. Result has 436 places, 532 transitions, 6104 flow [2024-06-14 12:11:05,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6104, PETRI_PLACES=436, PETRI_TRANSITIONS=532} [2024-06-14 12:11:05,186 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-14 12:11:05,186 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 532 transitions, 6104 flow [2024-06-14 12:11:05,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:05,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:05,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:05,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:11:05,186 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)] === [2024-06-14 12:11:05,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash -335338049, now seen corresponding path program 10 times [2024-06-14 12:11:05,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:05,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310957114] [2024-06-14 12:11:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:05,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:06,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:06,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310957114] [2024-06-14 12:11:06,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310957114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:06,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:06,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:06,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774136264] [2024-06-14 12:11:06,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:06,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:06,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:06,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:11:06,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 532 transitions, 6104 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:06,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:06,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:11:06,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:08,163 INFO L124 PetriNetUnfolderBase]: 4311/6999 cut-off events. [2024-06-14 12:11:08,163 INFO L125 PetriNetUnfolderBase]: For 2196384/2196391 co-relation queries the response was YES. [2024-06-14 12:11:08,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83472 conditions, 6999 events. 4311/6999 cut-off events. For 2196384/2196391 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45193 event pairs, 900 based on Foata normal form. 6/7002 useless extension candidates. Maximal degree in co-relation 83268. Up to 6406 conditions per place. [2024-06-14 12:11:08,280 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 463 selfloop transitions, 89 changer transitions 0/557 dead transitions. [2024-06-14 12:11:08,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 557 transitions, 8408 flow [2024-06-14 12:11:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:11:08,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:11:08,281 INFO L175 Difference]: Start difference. First operand has 436 places, 532 transitions, 6104 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:11:08,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 557 transitions, 8408 flow [2024-06-14 12:11:13,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 557 transitions, 8151 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:13,115 INFO L231 Difference]: Finished difference. Result has 438 places, 541 transitions, 6517 flow [2024-06-14 12:11:13,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6517, PETRI_PLACES=438, PETRI_TRANSITIONS=541} [2024-06-14 12:11:13,116 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-14 12:11:13,116 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 541 transitions, 6517 flow [2024-06-14 12:11:13,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:13,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:13,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:11:13,117 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)] === [2024-06-14 12:11:13,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1512278589, now seen corresponding path program 8 times [2024-06-14 12:11:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:13,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170178339] [2024-06-14 12:11:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170178339] [2024-06-14 12:11:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170178339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537525744] [2024-06-14 12:11:14,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:14,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:11:14,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 541 transitions, 6517 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:14,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:14,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:11:14,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:16,082 INFO L124 PetriNetUnfolderBase]: 4115/6778 cut-off events. [2024-06-14 12:11:16,082 INFO L125 PetriNetUnfolderBase]: For 2250522/2250529 co-relation queries the response was YES. [2024-06-14 12:11:16,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83643 conditions, 6778 events. 4115/6778 cut-off events. For 2250522/2250529 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44686 event pairs, 828 based on Foata normal form. 7/6740 useless extension candidates. Maximal degree in co-relation 83438. Up to 5998 conditions per place. [2024-06-14 12:11:16,214 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 422 selfloop transitions, 96 changer transitions 0/571 dead transitions. [2024-06-14 12:11:16,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 571 transitions, 8727 flow [2024-06-14 12:11:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:11:16,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:11:16,215 INFO L175 Difference]: Start difference. First operand has 438 places, 541 transitions, 6517 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:11:16,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 571 transitions, 8727 flow [2024-06-14 12:11:21,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 571 transitions, 8397 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:21,739 INFO L231 Difference]: Finished difference. Result has 443 places, 558 transitions, 7023 flow [2024-06-14 12:11:21,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7023, PETRI_PLACES=443, PETRI_TRANSITIONS=558} [2024-06-14 12:11:21,740 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-14 12:11:21,740 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 558 transitions, 7023 flow [2024-06-14 12:11:21,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:21,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:21,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:21,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:11:21,740 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)] === [2024-06-14 12:11:21,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1518267789, now seen corresponding path program 9 times [2024-06-14 12:11:21,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:21,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65594794] [2024-06-14 12:11:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:21,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65594794] [2024-06-14 12:11:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65594794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:22,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:22,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:22,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722560543] [2024-06-14 12:11:22,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:22,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:22,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:11:22,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 558 transitions, 7023 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:22,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:22,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:11:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:24,753 INFO L124 PetriNetUnfolderBase]: 4123/6792 cut-off events. [2024-06-14 12:11:24,753 INFO L125 PetriNetUnfolderBase]: For 2288624/2288631 co-relation queries the response was YES. [2024-06-14 12:11:24,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84278 conditions, 6792 events. 4123/6792 cut-off events. For 2288624/2288631 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44850 event pairs, 829 based on Foata normal form. 8/6755 useless extension candidates. Maximal degree in co-relation 84071. Up to 6069 conditions per place. [2024-06-14 12:11:24,884 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 462 selfloop transitions, 62 changer transitions 0/577 dead transitions. [2024-06-14 12:11:24,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 577 transitions, 8679 flow [2024-06-14 12:11:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:11:24,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:11:24,885 INFO L175 Difference]: Start difference. First operand has 443 places, 558 transitions, 7023 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:11:24,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 577 transitions, 8679 flow [2024-06-14 12:11:30,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 577 transitions, 8343 flow, removed 161 selfloop flow, removed 2 redundant places. [2024-06-14 12:11:30,761 INFO L231 Difference]: Finished difference. Result has 450 places, 564 transitions, 7132 flow [2024-06-14 12:11:30,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7132, PETRI_PLACES=450, PETRI_TRANSITIONS=564} [2024-06-14 12:11:30,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 405 predicate places. [2024-06-14 12:11:30,762 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 564 transitions, 7132 flow [2024-06-14 12:11:30,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:30,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:30,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:11:30,762 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)] === [2024-06-14 12:11:30,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1755098303, now seen corresponding path program 11 times [2024-06-14 12:11:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202011746] [2024-06-14 12:11:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:30,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:31,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:31,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202011746] [2024-06-14 12:11:31,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202011746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:31,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:31,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352406974] [2024-06-14 12:11:31,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:31,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:11:31,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 564 transitions, 7132 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:31,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:31,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:11:31,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:33,762 INFO L124 PetriNetUnfolderBase]: 4344/7043 cut-off events. [2024-06-14 12:11:33,762 INFO L125 PetriNetUnfolderBase]: For 2295311/2295318 co-relation queries the response was YES. [2024-06-14 12:11:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85043 conditions, 7043 events. 4344/7043 cut-off events. For 2295311/2295318 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 45485 event pairs, 891 based on Foata normal form. 6/7046 useless extension candidates. Maximal degree in co-relation 84833. Up to 6455 conditions per place. [2024-06-14 12:11:33,893 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 483 selfloop transitions, 91 changer transitions 0/579 dead transitions. [2024-06-14 12:11:33,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 579 transitions, 8698 flow [2024-06-14 12:11:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:11:33,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 12:11:33,894 INFO L175 Difference]: Start difference. First operand has 450 places, 564 transitions, 7132 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:11:33,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 579 transitions, 8698 flow [2024-06-14 12:11:39,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 579 transitions, 8356 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:39,991 INFO L231 Difference]: Finished difference. Result has 453 places, 564 transitions, 6978 flow [2024-06-14 12:11:39,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6978, PETRI_PLACES=453, PETRI_TRANSITIONS=564} [2024-06-14 12:11:39,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-14 12:11:39,992 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 564 transitions, 6978 flow [2024-06-14 12:11:39,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:39,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:39,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:39,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:11:39,992 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)] === [2024-06-14 12:11:39,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1290366639, now seen corresponding path program 10 times [2024-06-14 12:11:39,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:39,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427521046] [2024-06-14 12:11:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:39,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:41,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:41,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427521046] [2024-06-14 12:11:41,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427521046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:41,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:41,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:41,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951565709] [2024-06-14 12:11:41,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:41,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:41,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:41,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:11:41,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 564 transitions, 6978 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:41,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:41,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:11:41,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:43,075 INFO L124 PetriNetUnfolderBase]: 4116/6782 cut-off events. [2024-06-14 12:11:43,075 INFO L125 PetriNetUnfolderBase]: For 2293716/2293723 co-relation queries the response was YES. [2024-06-14 12:11:43,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83284 conditions, 6782 events. 4116/6782 cut-off events. For 2293716/2293723 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44791 event pairs, 827 based on Foata normal form. 7/6744 useless extension candidates. Maximal degree in co-relation 83073. Up to 6001 conditions per place. [2024-06-14 12:11:43,207 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 422 selfloop transitions, 102 changer transitions 0/577 dead transitions. [2024-06-14 12:11:43,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 577 transitions, 8647 flow [2024-06-14 12:11:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:11:43,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:11:43,209 INFO L175 Difference]: Start difference. First operand has 453 places, 564 transitions, 6978 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:11:43,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 577 transitions, 8647 flow [2024-06-14 12:11:49,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 577 transitions, 8395 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:49,860 INFO L231 Difference]: Finished difference. Result has 455 places, 564 transitions, 6936 flow [2024-06-14 12:11:49,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6936, PETRI_PLACES=455, PETRI_TRANSITIONS=564} [2024-06-14 12:11:49,860 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 12:11:49,860 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 564 transitions, 6936 flow [2024-06-14 12:11:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:49,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:49,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:49,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:11:49,861 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)] === [2024-06-14 12:11:49,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1748432063, now seen corresponding path program 12 times [2024-06-14 12:11:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101543081] [2024-06-14 12:11:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:50,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101543081] [2024-06-14 12:11:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101543081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:50,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:50,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:50,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170669226] [2024-06-14 12:11:50,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:50,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:50,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:50,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:11:50,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 564 transitions, 6936 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:50,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:50,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:11:50,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:52,705 INFO L124 PetriNetUnfolderBase]: 4335/7033 cut-off events. [2024-06-14 12:11:52,705 INFO L125 PetriNetUnfolderBase]: For 2315880/2315887 co-relation queries the response was YES. [2024-06-14 12:11:52,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84448 conditions, 7033 events. 4335/7033 cut-off events. For 2315880/2315887 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 45410 event pairs, 894 based on Foata normal form. 6/7036 useless extension candidates. Maximal degree in co-relation 84236. Up to 6446 conditions per place. [2024-06-14 12:11:52,836 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 483 selfloop transitions, 91 changer transitions 0/579 dead transitions. [2024-06-14 12:11:52,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 579 transitions, 8212 flow [2024-06-14 12:11:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:11:52,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:11:52,837 INFO L175 Difference]: Start difference. First operand has 455 places, 564 transitions, 6936 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:11:52,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 579 transitions, 8212 flow [2024-06-14 12:11:58,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 579 transitions, 7821 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:58,956 INFO L231 Difference]: Finished difference. Result has 455 places, 564 transitions, 6733 flow [2024-06-14 12:11:58,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6733, PETRI_PLACES=455, PETRI_TRANSITIONS=564} [2024-06-14 12:11:58,957 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 12:11:58,957 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 564 transitions, 6733 flow [2024-06-14 12:11:58,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:58,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:58,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:11:58,957 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)] === [2024-06-14 12:11:58,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -335100465, now seen corresponding path program 11 times [2024-06-14 12:11:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966966734] [2024-06-14 12:11:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966966734] [2024-06-14 12:12:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966966734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:00,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435060881] [2024-06-14 12:12:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:00,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:12:00,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 564 transitions, 6733 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:00,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:00,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:12:00,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:02,088 INFO L124 PetriNetUnfolderBase]: 4105/6766 cut-off events. [2024-06-14 12:12:02,089 INFO L125 PetriNetUnfolderBase]: For 2314894/2314901 co-relation queries the response was YES. [2024-06-14 12:12:02,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82566 conditions, 6766 events. 4105/6766 cut-off events. For 2314894/2314901 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 44689 event pairs, 823 based on Foata normal form. 7/6728 useless extension candidates. Maximal degree in co-relation 82355. Up to 6055 conditions per place. [2024-06-14 12:12:02,212 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 465 selfloop transitions, 61 changer transitions 0/579 dead transitions. [2024-06-14 12:12:02,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 579 transitions, 8182 flow [2024-06-14 12:12:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:12:02,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:12:02,213 INFO L175 Difference]: Start difference. First operand has 455 places, 564 transitions, 6733 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:12:02,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 579 transitions, 8182 flow [2024-06-14 12:12:09,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 579 transitions, 7860 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:09,239 INFO L231 Difference]: Finished difference. Result has 456 places, 566 transitions, 6626 flow [2024-06-14 12:12:09,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6626, PETRI_PLACES=456, PETRI_TRANSITIONS=566} [2024-06-14 12:12:09,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 411 predicate places. [2024-06-14 12:12:09,240 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 566 transitions, 6626 flow [2024-06-14 12:12:09,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:09,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:09,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:09,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:12:09,241 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)] === [2024-06-14 12:12:09,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1518743019, now seen corresponding path program 12 times [2024-06-14 12:12:09,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:09,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343358564] [2024-06-14 12:12:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:09,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:10,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343358564] [2024-06-14 12:12:10,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343358564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:10,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:10,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912012696] [2024-06-14 12:12:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:10,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:10,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:10,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:12:10,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 566 transitions, 6626 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:10,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:10,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:12:10,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:12,322 INFO L124 PetriNetUnfolderBase]: 4101/6764 cut-off events. [2024-06-14 12:12:12,322 INFO L125 PetriNetUnfolderBase]: For 2332529/2332536 co-relation queries the response was YES. [2024-06-14 12:12:12,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82244 conditions, 6764 events. 4101/6764 cut-off events. For 2332529/2332536 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 44716 event pairs, 824 based on Foata normal form. 8/6727 useless extension candidates. Maximal degree in co-relation 82031. Up to 6067 conditions per place. [2024-06-14 12:12:12,451 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 478 selfloop transitions, 48 changer transitions 0/579 dead transitions. [2024-06-14 12:12:12,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 579 transitions, 7715 flow [2024-06-14 12:12:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:12:12,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:12:12,452 INFO L175 Difference]: Start difference. First operand has 456 places, 566 transitions, 6626 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:12:12,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 579 transitions, 7715 flow [2024-06-14 12:12:18,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 579 transitions, 7464 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:18,113 INFO L231 Difference]: Finished difference. Result has 459 places, 566 transitions, 6478 flow [2024-06-14 12:12:18,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6478, PETRI_PLACES=459, PETRI_TRANSITIONS=566} [2024-06-14 12:12:18,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 414 predicate places. [2024-06-14 12:12:18,113 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 566 transitions, 6478 flow [2024-06-14 12:12:18,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:18,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:18,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:18,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:12:18,113 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:18,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1534125432, now seen corresponding path program 11 times [2024-06-14 12:12:18,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:18,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609304999] [2024-06-14 12:12:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:18,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:19,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:19,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609304999] [2024-06-14 12:12:19,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609304999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:19,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:12:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657939131] [2024-06-14 12:12:19,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:19,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:12:19,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:12:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:12:19,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:12:19,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 566 transitions, 6478 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:19,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:19,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:12:19,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:21,702 INFO L124 PetriNetUnfolderBase]: 4497/7332 cut-off events. [2024-06-14 12:12:21,702 INFO L125 PetriNetUnfolderBase]: For 2533111/2533114 co-relation queries the response was YES. [2024-06-14 12:12:21,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87771 conditions, 7332 events. 4497/7332 cut-off events. For 2533111/2533114 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 48074 event pairs, 912 based on Foata normal form. 12/7340 useless extension candidates. Maximal degree in co-relation 87557. Up to 6085 conditions per place. [2024-06-14 12:12:21,841 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 489 selfloop transitions, 127 changer transitions 0/621 dead transitions. [2024-06-14 12:12:21,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 621 transitions, 8642 flow [2024-06-14 12:12:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 12:12:21,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-14 12:12:21,842 INFO L175 Difference]: Start difference. First operand has 459 places, 566 transitions, 6478 flow. Second operand 11 states and 223 transitions. [2024-06-14 12:12:21,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 621 transitions, 8642 flow [2024-06-14 12:12:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 621 transitions, 8524 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:28,926 INFO L231 Difference]: Finished difference. Result has 465 places, 575 transitions, 6947 flow [2024-06-14 12:12:28,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6360, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6947, PETRI_PLACES=465, PETRI_TRANSITIONS=575} [2024-06-14 12:12:28,926 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-14 12:12:28,926 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 575 transitions, 6947 flow [2024-06-14 12:12:28,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:28,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:28,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:28,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:12:28,927 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)] === [2024-06-14 12:12:28,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash -580850380, now seen corresponding path program 12 times [2024-06-14 12:12:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209890929] [2024-06-14 12:12:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209890929] [2024-06-14 12:12:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209890929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:12:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525419585] [2024-06-14 12:12:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:12:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:12:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:12:30,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:12:30,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 575 transitions, 6947 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:30,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:30,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:12:30,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:32,618 INFO L124 PetriNetUnfolderBase]: 4538/7413 cut-off events. [2024-06-14 12:12:32,618 INFO L125 PetriNetUnfolderBase]: For 2582979/2582982 co-relation queries the response was YES. [2024-06-14 12:12:32,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89613 conditions, 7413 events. 4538/7413 cut-off events. For 2582979/2582982 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 48847 event pairs, 932 based on Foata normal form. 12/7421 useless extension candidates. Maximal degree in co-relation 89396. Up to 6230 conditions per place. [2024-06-14 12:12:32,757 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 492 selfloop transitions, 124 changer transitions 0/621 dead transitions. [2024-06-14 12:12:32,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 621 transitions, 8938 flow [2024-06-14 12:12:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 12:12:32,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-14 12:12:32,758 INFO L175 Difference]: Start difference. First operand has 465 places, 575 transitions, 6947 flow. Second operand 11 states and 221 transitions. [2024-06-14 12:12:32,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 621 transitions, 8938 flow [2024-06-14 12:12:41,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 621 transitions, 8798 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:41,842 INFO L231 Difference]: Finished difference. Result has 472 places, 576 transitions, 7156 flow [2024-06-14 12:12:41,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7156, PETRI_PLACES=472, PETRI_TRANSITIONS=576} [2024-06-14 12:12:41,843 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 427 predicate places. [2024-06-14 12:12:41,843 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 576 transitions, 7156 flow [2024-06-14 12:12:41,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:41,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:41,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:41,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:12:41,844 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)] === [2024-06-14 12:12:41,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:41,844 INFO L85 PathProgramCache]: Analyzing trace with hash -588259690, now seen corresponding path program 13 times [2024-06-14 12:12:41,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:41,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886851317] [2024-06-14 12:12:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:41,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:43,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:43,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886851317] [2024-06-14 12:12:43,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886851317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:43,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:43,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:12:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249700844] [2024-06-14 12:12:43,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:12:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:12:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:12:43,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:12:43,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 576 transitions, 7156 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:43,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:43,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:12:43,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:45,684 INFO L124 PetriNetUnfolderBase]: 4518/7381 cut-off events. [2024-06-14 12:12:45,684 INFO L125 PetriNetUnfolderBase]: For 2513439/2513442 co-relation queries the response was YES. [2024-06-14 12:12:45,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87575 conditions, 7381 events. 4518/7381 cut-off events. For 2513439/2513442 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 48574 event pairs, 923 based on Foata normal form. 12/7389 useless extension candidates. Maximal degree in co-relation 87356. Up to 6334 conditions per place. [2024-06-14 12:12:45,816 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 492 selfloop transitions, 121 changer transitions 0/618 dead transitions. [2024-06-14 12:12:45,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 618 transitions, 8592 flow [2024-06-14 12:12:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-14 12:12:45,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-14 12:12:45,817 INFO L175 Difference]: Start difference. First operand has 472 places, 576 transitions, 7156 flow. Second operand 11 states and 217 transitions. [2024-06-14 12:12:45,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 618 transitions, 8592 flow [2024-06-14 12:12:54,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 618 transitions, 8198 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:54,176 INFO L231 Difference]: Finished difference. Result has 474 places, 576 transitions, 7010 flow [2024-06-14 12:12:54,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7010, PETRI_PLACES=474, PETRI_TRANSITIONS=576} [2024-06-14 12:12:54,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 429 predicate places. [2024-06-14 12:12:54,177 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 576 transitions, 7010 flow [2024-06-14 12:12:54,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:54,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:54,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:12:54,177 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)] === [2024-06-14 12:12:54,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1778958698, now seen corresponding path program 14 times [2024-06-14 12:12:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:54,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277849562] [2024-06-14 12:12:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:54,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277849562] [2024-06-14 12:12:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277849562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:12:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205808407] [2024-06-14 12:12:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:55,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:12:55,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:12:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:12:55,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:12:55,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 576 transitions, 7010 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:12:55,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:55,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:12:55,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:57,652 INFO L124 PetriNetUnfolderBase]: 4600/7543 cut-off events. [2024-06-14 12:12:57,653 INFO L125 PetriNetUnfolderBase]: For 2541151/2541154 co-relation queries the response was YES. [2024-06-14 12:12:57,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88327 conditions, 7543 events. 4600/7543 cut-off events. For 2541151/2541154 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 49938 event pairs, 848 based on Foata normal form. 12/7551 useless extension candidates. Maximal degree in co-relation 88107. Up to 4011 conditions per place. [2024-06-14 12:12:57,794 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 442 selfloop transitions, 177 changer transitions 0/624 dead transitions. [2024-06-14 12:12:57,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 624 transitions, 8888 flow [2024-06-14 12:12:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 12:12:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:12:57,795 INFO L175 Difference]: Start difference. First operand has 474 places, 576 transitions, 7010 flow. Second operand 11 states and 220 transitions. [2024-06-14 12:12:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 624 transitions, 8888 flow [2024-06-14 12:13:06,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 624 transitions, 8629 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 12:13:06,097 INFO L231 Difference]: Finished difference. Result has 477 places, 578 transitions, 7321 flow [2024-06-14 12:13:06,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6751, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7321, PETRI_PLACES=477, PETRI_TRANSITIONS=578} [2024-06-14 12:13:06,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 432 predicate places. [2024-06-14 12:13:06,098 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 578 transitions, 7321 flow [2024-06-14 12:13:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:06,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:06,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:06,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:13:06,098 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)] === [2024-06-14 12:13:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1703584608, now seen corresponding path program 15 times [2024-06-14 12:13:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:06,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313520510] [2024-06-14 12:13:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:07,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313520510] [2024-06-14 12:13:07,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313520510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:07,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:07,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:13:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6739310] [2024-06-14 12:13:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:07,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:13:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:13:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:13:07,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:13:07,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 578 transitions, 7321 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:07,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:07,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:13:07,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:09,940 INFO L124 PetriNetUnfolderBase]: 4771/7856 cut-off events. [2024-06-14 12:13:09,940 INFO L125 PetriNetUnfolderBase]: For 2695237/2695240 co-relation queries the response was YES. [2024-06-14 12:13:10,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93783 conditions, 7856 events. 4771/7856 cut-off events. For 2695237/2695240 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 52946 event pairs, 1002 based on Foata normal form. 12/7864 useless extension candidates. Maximal degree in co-relation 93561. Up to 6624 conditions per place. [2024-06-14 12:13:10,094 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 506 selfloop transitions, 118 changer transitions 0/629 dead transitions. [2024-06-14 12:13:10,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 629 transitions, 9498 flow [2024-06-14 12:13:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:13:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:13:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 12:13:10,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-14 12:13:10,095 INFO L175 Difference]: Start difference. First operand has 477 places, 578 transitions, 7321 flow. Second operand 11 states and 225 transitions. [2024-06-14 12:13:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 629 transitions, 9498 flow [2024-06-14 12:13:18,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 629 transitions, 9145 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:18,786 INFO L231 Difference]: Finished difference. Result has 481 places, 584 transitions, 7476 flow [2024-06-14 12:13:18,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6975, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7476, PETRI_PLACES=481, PETRI_TRANSITIONS=584} [2024-06-14 12:13:18,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 436 predicate places. [2024-06-14 12:13:18,787 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 584 transitions, 7476 flow [2024-06-14 12:13:18,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:18,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:18,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:13:18,787 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)] === [2024-06-14 12:13:18,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1446824628, now seen corresponding path program 16 times [2024-06-14 12:13:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:18,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864606976] [2024-06-14 12:13:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:18,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:19,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:19,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864606976] [2024-06-14 12:13:19,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864606976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:19,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:19,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:13:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294400084] [2024-06-14 12:13:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:19,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:13:19,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:13:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:13:20,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:13:20,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 584 transitions, 7476 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:20,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:20,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:13:20,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:23,023 INFO L124 PetriNetUnfolderBase]: 4751/7824 cut-off events. [2024-06-14 12:13:23,023 INFO L125 PetriNetUnfolderBase]: For 2628889/2628892 co-relation queries the response was YES. [2024-06-14 12:13:23,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91464 conditions, 7824 events. 4751/7824 cut-off events. For 2628889/2628892 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52742 event pairs, 993 based on Foata normal form. 12/7832 useless extension candidates. Maximal degree in co-relation 91240. Up to 6728 conditions per place. [2024-06-14 12:13:23,162 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 506 selfloop transitions, 115 changer transitions 0/626 dead transitions. [2024-06-14 12:13:23,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 626 transitions, 8928 flow [2024-06-14 12:13:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:13:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:13:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 12:13:23,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-14 12:13:23,163 INFO L175 Difference]: Start difference. First operand has 481 places, 584 transitions, 7476 flow. Second operand 11 states and 221 transitions. [2024-06-14 12:13:23,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 626 transitions, 8928 flow [2024-06-14 12:13:32,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 626 transitions, 8577 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:32,422 INFO L231 Difference]: Finished difference. Result has 486 places, 584 transitions, 7361 flow [2024-06-14 12:13:32,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7125, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7361, PETRI_PLACES=486, PETRI_TRANSITIONS=584} [2024-06-14 12:13:32,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 441 predicate places. [2024-06-14 12:13:32,423 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 584 transitions, 7361 flow [2024-06-14 12:13:32,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:32,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:32,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:32,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:13:32,423 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)] === [2024-06-14 12:13:32,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1092343018, now seen corresponding path program 17 times [2024-06-14 12:13:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:32,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920890436] [2024-06-14 12:13:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:32,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:33,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920890436] [2024-06-14 12:13:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920890436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:33,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:13:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427180958] [2024-06-14 12:13:33,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:33,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:13:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:13:33,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:13:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:13:33,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 584 transitions, 7361 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:33,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:13:33,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:36,720 INFO L124 PetriNetUnfolderBase]: 4792/7905 cut-off events. [2024-06-14 12:13:36,720 INFO L125 PetriNetUnfolderBase]: For 2648077/2648080 co-relation queries the response was YES. [2024-06-14 12:13:36,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91791 conditions, 7905 events. 4792/7905 cut-off events. For 2648077/2648080 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 53498 event pairs, 998 based on Foata normal form. 12/7913 useless extension candidates. Maximal degree in co-relation 91566. Up to 6272 conditions per place. [2024-06-14 12:13:36,855 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 497 selfloop transitions, 128 changer transitions 0/630 dead transitions. [2024-06-14 12:13:36,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 630 transitions, 9239 flow [2024-06-14 12:13:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:13:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:13:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 12:13:36,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-14 12:13:36,857 INFO L175 Difference]: Start difference. First operand has 486 places, 584 transitions, 7361 flow. Second operand 11 states and 223 transitions. [2024-06-14 12:13:36,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 630 transitions, 9239 flow [2024-06-14 12:13:45,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 630 transitions, 8992 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 12:13:45,690 INFO L231 Difference]: Finished difference. Result has 488 places, 585 transitions, 7474 flow [2024-06-14 12:13:45,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7114, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7474, PETRI_PLACES=488, PETRI_TRANSITIONS=585} [2024-06-14 12:13:45,691 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 443 predicate places. [2024-06-14 12:13:45,691 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 585 transitions, 7474 flow [2024-06-14 12:13:45,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:45,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:45,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:45,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:13:45,691 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)] === [2024-06-14 12:13:45,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1276857780, now seen corresponding path program 18 times [2024-06-14 12:13:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215109191] [2024-06-14 12:13:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215109191] [2024-06-14 12:13:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215109191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:13:46,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594401555] [2024-06-14 12:13:46,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:46,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:13:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:13:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:13:47,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:13:47,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 585 transitions, 7474 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:47,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:47,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:13:47,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:49,899 INFO L124 PetriNetUnfolderBase]: 4902/8105 cut-off events. [2024-06-14 12:13:49,899 INFO L125 PetriNetUnfolderBase]: For 2701493/2701496 co-relation queries the response was YES. [2024-06-14 12:13:50,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93849 conditions, 8105 events. 4902/8105 cut-off events. For 2701493/2701496 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 55361 event pairs, 1033 based on Foata normal form. 12/8113 useless extension candidates. Maximal degree in co-relation 93623. Up to 6980 conditions per place. [2024-06-14 12:13:50,039 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 506 selfloop transitions, 121 changer transitions 0/632 dead transitions. [2024-06-14 12:13:50,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 632 transitions, 9105 flow [2024-06-14 12:13:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:13:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:13:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-14 12:13:50,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-14 12:13:50,041 INFO L175 Difference]: Start difference. First operand has 488 places, 585 transitions, 7474 flow. Second operand 11 states and 218 transitions. [2024-06-14 12:13:50,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 632 transitions, 9105 flow [2024-06-14 12:13:58,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 632 transitions, 8411 flow, removed 56 selfloop flow, removed 13 redundant places. [2024-06-14 12:13:58,514 INFO L231 Difference]: Finished difference. Result has 487 places, 590 transitions, 7205 flow [2024-06-14 12:13:58,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6808, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7205, PETRI_PLACES=487, PETRI_TRANSITIONS=590} [2024-06-14 12:13:58,514 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 442 predicate places. [2024-06-14 12:13:58,514 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 590 transitions, 7205 flow [2024-06-14 12:13:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:58,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:58,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:13:58,515 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)] === [2024-06-14 12:13:58,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1122054476, now seen corresponding path program 19 times [2024-06-14 12:13:58,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:58,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670850152] [2024-06-14 12:13:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:58,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:59,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:59,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670850152] [2024-06-14 12:13:59,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670850152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:59,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:59,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:13:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096582869] [2024-06-14 12:13:59,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:59,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:13:59,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:13:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:13:59,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:13:59,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 590 transitions, 7205 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:13:59,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:59,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:13:59,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:02,772 INFO L124 PetriNetUnfolderBase]: 4943/8186 cut-off events. [2024-06-14 12:14:02,772 INFO L125 PetriNetUnfolderBase]: For 2723079/2723082 co-relation queries the response was YES. [2024-06-14 12:14:02,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92896 conditions, 8186 events. 4943/8186 cut-off events. For 2723079/2723082 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 56085 event pairs, 1048 based on Foata normal form. 12/8194 useless extension candidates. Maximal degree in co-relation 92672. Up to 7051 conditions per place. [2024-06-14 12:14:02,910 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 509 selfloop transitions, 119 changer transitions 0/633 dead transitions. [2024-06-14 12:14:02,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 633 transitions, 8761 flow [2024-06-14 12:14:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:14:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:14:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 12:14:02,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:14:02,911 INFO L175 Difference]: Start difference. First operand has 487 places, 590 transitions, 7205 flow. Second operand 11 states and 220 transitions. [2024-06-14 12:14:02,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 633 transitions, 8761 flow [2024-06-14 12:14:12,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 633 transitions, 8476 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:12,148 INFO L231 Difference]: Finished difference. Result has 492 places, 591 transitions, 7256 flow [2024-06-14 12:14:12,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6920, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7256, PETRI_PLACES=492, PETRI_TRANSITIONS=591} [2024-06-14 12:14:12,148 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 447 predicate places. [2024-06-14 12:14:12,148 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 591 transitions, 7256 flow [2024-06-14 12:14:12,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:14:12,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:12,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:12,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:14:12,149 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)] === [2024-06-14 12:14:12,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1741973896, now seen corresponding path program 20 times [2024-06-14 12:14:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:12,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394586581] [2024-06-14 12:14:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394586581] [2024-06-14 12:14:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394586581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:13,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:13,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:14:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354948164] [2024-06-14 12:14:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:14:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:14:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:14:13,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:14:13,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 591 transitions, 7256 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:14:13,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:13,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:14:13,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:16,595 INFO L124 PetriNetUnfolderBase]: 4923/8154 cut-off events. [2024-06-14 12:14:16,595 INFO L125 PetriNetUnfolderBase]: For 2652357/2652360 co-relation queries the response was YES. [2024-06-14 12:14:16,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90868 conditions, 8154 events. 4923/8154 cut-off events. For 2652357/2652360 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 55845 event pairs, 1029 based on Foata normal form. 12/8162 useless extension candidates. Maximal degree in co-relation 90643. Up to 6730 conditions per place. [2024-06-14 12:14:16,740 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 503 selfloop transitions, 125 changer transitions 0/633 dead transitions. [2024-06-14 12:14:16,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 633 transitions, 8562 flow [2024-06-14 12:14:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:14:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:14:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-14 12:14:16,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-14 12:14:16,741 INFO L175 Difference]: Start difference. First operand has 492 places, 591 transitions, 7256 flow. Second operand 11 states and 219 transitions. [2024-06-14 12:14:16,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 633 transitions, 8562 flow [2024-06-14 12:14:25,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 633 transitions, 8186 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-14 12:14:25,556 INFO L231 Difference]: Finished difference. Result has 493 places, 590 transitions, 6972 flow [2024-06-14 12:14:25,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6718, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6972, PETRI_PLACES=493, PETRI_TRANSITIONS=590} [2024-06-14 12:14:25,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 448 predicate places. [2024-06-14 12:14:25,557 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 590 transitions, 6972 flow [2024-06-14 12:14:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 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) [2024-06-14 12:14:25,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:25,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:25,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:14:25,557 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:25,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:25,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1751866945, now seen corresponding path program 5 times [2024-06-14 12:14:25,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:25,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677438430] [2024-06-14 12:14:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:25,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:26,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:26,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677438430] [2024-06-14 12:14:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677438430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852258041] [2024-06-14 12:14:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:26,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:26,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:14:26,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 590 transitions, 6972 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:26,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:26,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:14:26,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:29,409 INFO L124 PetriNetUnfolderBase]: 4539/7676 cut-off events. [2024-06-14 12:14:29,409 INFO L125 PetriNetUnfolderBase]: For 2620903/2620916 co-relation queries the response was YES. [2024-06-14 12:14:29,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88968 conditions, 7676 events. 4539/7676 cut-off events. For 2620903/2620916 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 53831 event pairs, 934 based on Foata normal form. 4/7607 useless extension candidates. Maximal degree in co-relation 88744. Up to 6901 conditions per place. [2024-06-14 12:14:29,554 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 524 selfloop transitions, 45 changer transitions 0/610 dead transitions. [2024-06-14 12:14:29,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 610 transitions, 8768 flow [2024-06-14 12:14:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:14:29,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:14:29,555 INFO L175 Difference]: Start difference. First operand has 493 places, 590 transitions, 6972 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:14:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 610 transitions, 8768 flow [2024-06-14 12:14:37,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 610 transitions, 8365 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-14 12:14:37,248 INFO L231 Difference]: Finished difference. Result has 491 places, 596 transitions, 6948 flow [2024-06-14 12:14:37,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6948, PETRI_PLACES=491, PETRI_TRANSITIONS=596} [2024-06-14 12:14:37,248 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-14 12:14:37,248 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 596 transitions, 6948 flow [2024-06-14 12:14:37,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:37,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:37,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:37,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:14:37,249 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)] === [2024-06-14 12:14:37,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:37,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1936192821, now seen corresponding path program 7 times [2024-06-14 12:14:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:37,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245572237] [2024-06-14 12:14:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245572237] [2024-06-14 12:14:38,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245572237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:38,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:38,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:38,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929176975] [2024-06-14 12:14:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:38,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:38,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:14:38,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 596 transitions, 6948 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:38,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:38,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:14:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:41,015 INFO L124 PetriNetUnfolderBase]: 4551/7699 cut-off events. [2024-06-14 12:14:41,015 INFO L125 PetriNetUnfolderBase]: For 2678408/2678419 co-relation queries the response was YES. [2024-06-14 12:14:41,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89232 conditions, 7699 events. 4551/7699 cut-off events. For 2678408/2678419 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54086 event pairs, 941 based on Foata normal form. 10/7635 useless extension candidates. Maximal degree in co-relation 89008. Up to 6903 conditions per place. [2024-06-14 12:14:41,157 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 522 selfloop transitions, 52 changer transitions 0/615 dead transitions. [2024-06-14 12:14:41,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 615 transitions, 8712 flow [2024-06-14 12:14:41,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:14:41,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:14:41,158 INFO L175 Difference]: Start difference. First operand has 491 places, 596 transitions, 6948 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:14:41,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 615 transitions, 8712 flow [2024-06-14 12:14:50,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 615 transitions, 8517 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:50,200 INFO L231 Difference]: Finished difference. Result has 495 places, 602 transitions, 7129 flow [2024-06-14 12:14:50,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7129, PETRI_PLACES=495, PETRI_TRANSITIONS=602} [2024-06-14 12:14:50,200 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 450 predicate places. [2024-06-14 12:14:50,200 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 602 transitions, 7129 flow [2024-06-14 12:14:50,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:50,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:50,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:50,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:14:50,201 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)] === [2024-06-14 12:14:50,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1740805567, now seen corresponding path program 6 times [2024-06-14 12:14:50,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:50,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44542628] [2024-06-14 12:14:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:50,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:51,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:51,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44542628] [2024-06-14 12:14:51,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44542628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:51,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:51,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:51,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198337677] [2024-06-14 12:14:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:51,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:51,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:51,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:14:51,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 602 transitions, 7129 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:51,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:51,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:14:51,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:54,318 INFO L124 PetriNetUnfolderBase]: 4554/7701 cut-off events. [2024-06-14 12:14:54,318 INFO L125 PetriNetUnfolderBase]: For 2703263/2703291 co-relation queries the response was YES. [2024-06-14 12:14:54,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89892 conditions, 7701 events. 4554/7701 cut-off events. For 2703263/2703291 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54065 event pairs, 921 based on Foata normal form. 1/7629 useless extension candidates. Maximal degree in co-relation 89666. Up to 6990 conditions per place. [2024-06-14 12:14:54,457 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 556 selfloop transitions, 20 changer transitions 0/617 dead transitions. [2024-06-14 12:14:54,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 617 transitions, 8454 flow [2024-06-14 12:14:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:14:54,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-14 12:14:54,459 INFO L175 Difference]: Start difference. First operand has 495 places, 602 transitions, 7129 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:14:54,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 617 transitions, 8454 flow [2024-06-14 12:15:03,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 617 transitions, 8271 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:03,279 INFO L231 Difference]: Finished difference. Result has 499 places, 605 transitions, 7140 flow [2024-06-14 12:15:03,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7140, PETRI_PLACES=499, PETRI_TRANSITIONS=605} [2024-06-14 12:15:03,279 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 454 predicate places. [2024-06-14 12:15:03,279 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 605 transitions, 7140 flow [2024-06-14 12:15:03,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:03,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:03,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:03,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:15:03,280 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)] === [2024-06-14 12:15:03,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash 121604493, now seen corresponding path program 2 times [2024-06-14 12:15:03,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:03,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590847478] [2024-06-14 12:15:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:03,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590847478] [2024-06-14 12:15:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590847478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12552869] [2024-06-14 12:15:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:04,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:05,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:15:05,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 605 transitions, 7140 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:05,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:05,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:15:05,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:07,570 INFO L124 PetriNetUnfolderBase]: 4329/7387 cut-off events. [2024-06-14 12:15:07,570 INFO L125 PetriNetUnfolderBase]: For 2725100/2725133 co-relation queries the response was YES. [2024-06-14 12:15:07,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88415 conditions, 7387 events. 4329/7387 cut-off events. For 2725100/2725133 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 52325 event pairs, 878 based on Foata normal form. 5/7264 useless extension candidates. Maximal degree in co-relation 88187. Up to 6438 conditions per place. [2024-06-14 12:15:07,705 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 486 selfloop transitions, 42 changer transitions 0/620 dead transitions. [2024-06-14 12:15:07,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 620 transitions, 8377 flow [2024-06-14 12:15:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:15:07,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:15:07,706 INFO L175 Difference]: Start difference. First operand has 499 places, 605 transitions, 7140 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:15:07,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 620 transitions, 8377 flow [2024-06-14 12:15:15,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 620 transitions, 8201 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:15,721 INFO L231 Difference]: Finished difference. Result has 501 places, 608 transitions, 7210 flow [2024-06-14 12:15:15,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7210, PETRI_PLACES=501, PETRI_TRANSITIONS=608} [2024-06-14 12:15:15,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 456 predicate places. [2024-06-14 12:15:15,721 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 608 transitions, 7210 flow [2024-06-14 12:15:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:15,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:15,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:15,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:15:15,722 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)] === [2024-06-14 12:15:15,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1297976767, now seen corresponding path program 7 times [2024-06-14 12:15:15,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:15,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040202372] [2024-06-14 12:15:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:15,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040202372] [2024-06-14 12:15:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040202372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:17,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946240314] [2024-06-14 12:15:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:17,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:17,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:15:17,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 608 transitions, 7210 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:17,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:17,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:15:17,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:19,600 INFO L124 PetriNetUnfolderBase]: 4559/7715 cut-off events. [2024-06-14 12:15:19,600 INFO L125 PetriNetUnfolderBase]: For 2792554/2792587 co-relation queries the response was YES. [2024-06-14 12:15:19,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90985 conditions, 7715 events. 4559/7715 cut-off events. For 2792554/2792587 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54283 event pairs, 936 based on Foata normal form. 4/7645 useless extension candidates. Maximal degree in co-relation 90756. Up to 6844 conditions per place. [2024-06-14 12:15:19,750 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 499 selfloop transitions, 94 changer transitions 0/634 dead transitions. [2024-06-14 12:15:19,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 634 transitions, 9934 flow [2024-06-14 12:15:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:15:19,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:15:19,751 INFO L175 Difference]: Start difference. First operand has 501 places, 608 transitions, 7210 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:15:19,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 634 transitions, 9934 flow [2024-06-14 12:15:26,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 634 transitions, 9710 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:26,722 INFO L231 Difference]: Finished difference. Result has 503 places, 617 transitions, 7649 flow [2024-06-14 12:15:26,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7649, PETRI_PLACES=503, PETRI_TRANSITIONS=617} [2024-06-14 12:15:26,722 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 458 predicate places. [2024-06-14 12:15:26,722 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 617 transitions, 7649 flow [2024-06-14 12:15:26,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:26,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:26,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:26,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:15:26,723 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)] === [2024-06-14 12:15:26,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash -335105983, now seen corresponding path program 8 times [2024-06-14 12:15:26,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:26,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141518828] [2024-06-14 12:15:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:26,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141518828] [2024-06-14 12:15:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141518828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779327696] [2024-06-14 12:15:27,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:27,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:27,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:28,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:15:28,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 617 transitions, 7649 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:28,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:28,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:15:28,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:30,537 INFO L124 PetriNetUnfolderBase]: 4571/7734 cut-off events. [2024-06-14 12:15:30,538 INFO L125 PetriNetUnfolderBase]: For 2828107/2828120 co-relation queries the response was YES. [2024-06-14 12:15:30,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91786 conditions, 7734 events. 4571/7734 cut-off events. For 2828107/2828120 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 54409 event pairs, 936 based on Foata normal form. 4/7665 useless extension candidates. Maximal degree in co-relation 91556. Up to 6956 conditions per place. [2024-06-14 12:15:30,683 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 547 selfloop transitions, 47 changer transitions 0/635 dead transitions. [2024-06-14 12:15:30,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 635 transitions, 9377 flow [2024-06-14 12:15:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:15:30,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:15:30,684 INFO L175 Difference]: Start difference. First operand has 503 places, 617 transitions, 7649 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:15:30,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 635 transitions, 9377 flow