./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.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/mix010.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/mix010.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix010.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 11:54:12,840 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:54:12,903 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:54:12,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:54:12,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:54:12,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:54:12,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:54:12,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:54:12,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:54:12,937 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:54:12,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:54:12,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:54:12,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:54:12,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:54:12,940 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:54:12,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:54:12,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:54:12,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:54:12,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:54:12,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:54:12,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:54:12,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:54:12,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:54:12,942 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:54:12,942 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:54:12,942 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:54:12,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:54:12,943 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:54:12,943 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:54:12,943 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:54:12,944 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:54:12,944 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:54:12,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:54:12,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:54:12,945 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:54:12,945 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:54:12,945 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:54:12,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:54:12,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:54:12,946 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:54:12,946 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:54:12,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:54:12,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:54:12,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:54:13,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:54:13,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:54:13,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:54:13,192 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:54:13,193 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:54:13,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix010.opt.yml/witness.yml [2024-06-14 11:54:13,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:54:13,360 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:54:13,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-14 11:54:14,434 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:54:14,664 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:54:14,665 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-14 11:54:14,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f9dd359/95b7c185114c40baac1d7ace90a003f0/FLAGd9e02c3fd [2024-06-14 11:54:14,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f9dd359/95b7c185114c40baac1d7ace90a003f0 [2024-06-14 11:54:14,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:54:14,695 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:54:14,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:54:14,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:54:14,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:54:14,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:54:13" (1/2) ... [2024-06-14 11:54:14,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76246351 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:54:14, skipping insertion in model container [2024-06-14 11:54:14,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:54:13" (1/2) ... [2024-06-14 11:54:14,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76225cc7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:54:14, skipping insertion in model container [2024-06-14 11:54:14,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:54:14" (2/2) ... [2024-06-14 11:54:14,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76246351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:14, skipping insertion in model container [2024-06-14 11:54:14,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:54:14" (2/2) ... [2024-06-14 11:54:14,705 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:54:14,782 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:54:14,783 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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:54:14,783 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$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_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 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_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:54:14,783 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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$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_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:54:14,783 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:54:14,784 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 11:54:14,824 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:54:15,115 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:54:15,124 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:54:15,275 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:54:15,300 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:54:15,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15 WrapperNode [2024-06-14 11:54:15,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:54:15,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:54:15,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:54:15,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:54:15,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,341 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-14 11:54:15,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:54:15,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:54:15,342 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:54:15,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:54:15,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,367 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 11:54:15,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,382 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,398 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,401 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:54:15,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:54:15,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:54:15,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:54:15,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (1/1) ... [2024-06-14 11:54:15,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:54:15,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:54:15,430 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 11:54:15,458 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 11:54:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:54:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:54:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:54:15,470 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:54:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:54:15,470 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:54:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:54:15,470 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:54:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:54:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:54:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:54:15,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:54:15,472 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 11:54:15,597 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:54:15,599 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:54:15,888 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:54:15,889 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:54:16,031 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:54:16,031 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:54:16,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:54:16 BoogieIcfgContainer [2024-06-14 11:54:16,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:54:16,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:54:16,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:54:16,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:54:16,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:54:13" (1/4) ... [2024-06-14 11:54:16,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f27669 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:54:16, skipping insertion in model container [2024-06-14 11:54:16,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:54:14" (2/4) ... [2024-06-14 11:54:16,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f27669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:54:16, skipping insertion in model container [2024-06-14 11:54:16,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:54:15" (3/4) ... [2024-06-14 11:54:16,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f27669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:54:16, skipping insertion in model container [2024-06-14 11:54:16,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:54:16" (4/4) ... [2024-06-14 11:54:16,038 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.opt.i [2024-06-14 11:54:16,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:54:16,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:54:16,050 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:54:16,083 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:54:16,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:54:16,137 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 11:54:16,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:54:16,139 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 4. Compared 73 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 11:54:16,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:54:16,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 11:54:16,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:54:16,152 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;@4393e437, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:54:16,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:54:16,155 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:54:16,156 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:54:16,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:54:16,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:16,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:54:16,157 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 11:54:16,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash -409799565, now seen corresponding path program 1 times [2024-06-14 11:54:16,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:16,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259174393] [2024-06-14 11:54:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:17,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:17,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259174393] [2024-06-14 11:54:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259174393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:17,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:17,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:54:17,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25245974] [2024-06-14 11:54:17,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:54:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:17,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:54:17,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:54:17,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-14 11:54:17,291 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 11:54:17,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:17,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-14 11:54:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:17,589 INFO L124 PetriNetUnfolderBase]: 1059/1692 cut-off events. [2024-06-14 11:54:17,589 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-06-14 11:54:17,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3358 conditions, 1692 events. 1059/1692 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8821 event pairs, 698 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 3343. Up to 1593 conditions per place. [2024-06-14 11:54:17,602 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 11:54:17,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 179 flow [2024-06-14 11:54:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:54:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:54:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-14 11:54:17,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-06-14 11:54:17,614 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 82 transitions. [2024-06-14 11:54:17,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 179 flow [2024-06-14 11:54:17,616 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 11:54:17,619 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 11:54:17,621 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 11:54:17,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 11:54:17,624 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 11:54:17,624 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 11:54:17,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:17,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:17,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:54:17,625 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 11:54:17,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:17,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1319629714, now seen corresponding path program 1 times [2024-06-14 11:54:17,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:17,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522551837] [2024-06-14 11:54:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:17,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:18,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522551837] [2024-06-14 11:54:18,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522551837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:54:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39952114] [2024-06-14 11:54:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:54:18,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:54:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:54:18,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:54:18,478 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 11:54:18,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:18,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:54:18,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:18,731 INFO L124 PetriNetUnfolderBase]: 1215/1891 cut-off events. [2024-06-14 11:54:18,732 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-14 11:54:18,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4304 conditions, 1891 events. 1215/1891 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9688 event pairs, 648 based on Foata normal form. 3/1887 useless extension candidates. Maximal degree in co-relation 4289. Up to 1803 conditions per place. [2024-06-14 11:54:18,739 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:54:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-14 11:54:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:54:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:54:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 11:54:18,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:54:18,741 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-14 11:54:18,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-14 11:54:18,742 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 11:54:18,743 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 11:54:18,743 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 11:54:18,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 11:54:18,744 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 11:54:18,744 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 11:54:18,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:18,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:18,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:54:18,745 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 11:54:18,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1253845609, now seen corresponding path program 1 times [2024-06-14 11:54:18,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:18,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482555184] [2024-06-14 11:54:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:18,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:19,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482555184] [2024-06-14 11:54:19,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482555184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:19,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:19,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:54:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101149473] [2024-06-14 11:54:19,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:54:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:54:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:54:19,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:54:19,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 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 11:54:19,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:19,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:54:19,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:20,275 INFO L124 PetriNetUnfolderBase]: 1545/2364 cut-off events. [2024-06-14 11:54:20,275 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-06-14 11:54:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5938 conditions, 2364 events. 1545/2364 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11841 event pairs, 575 based on Foata normal form. 6/2357 useless extension candidates. Maximal degree in co-relation 5921. Up to 2233 conditions per place. [2024-06-14 11:54:20,285 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-14 11:54:20,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 360 flow [2024-06-14 11:54:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:54:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:54:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 11:54:20,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-14 11:54:20,289 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 140 transitions. [2024-06-14 11:54:20,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 360 flow [2024-06-14 11:54:20,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 340 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:54:20,291 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 185 flow [2024-06-14 11:54:20,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-14 11:54:20,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-06-14 11:54:20,292 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 185 flow [2024-06-14 11:54:20,292 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 11:54:20,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:20,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:20,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:54:20,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:20,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:20,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1073761965, now seen corresponding path program 1 times [2024-06-14 11:54:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:20,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891084464] [2024-06-14 11:54:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:20,911 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 11:54:20,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:20,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891084464] [2024-06-14 11:54:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891084464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:20,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:54:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129317904] [2024-06-14 11:54:20,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:20,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:54:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:54:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:54:20,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:54:20,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 185 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 11:54:20,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:20,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:54:20,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:21,412 INFO L124 PetriNetUnfolderBase]: 1333/2110 cut-off events. [2024-06-14 11:54:21,412 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-14 11:54:21,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5765 conditions, 2110 events. 1333/2110 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10827 event pairs, 592 based on Foata normal form. 2/2079 useless extension candidates. Maximal degree in co-relation 5746. Up to 1980 conditions per place. [2024-06-14 11:54:21,423 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-14 11:54:21,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 331 flow [2024-06-14 11:54:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:54:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:54:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-14 11:54:21,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 11:54:21,425 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 185 flow. Second operand 5 states and 106 transitions. [2024-06-14 11:54:21,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 331 flow [2024-06-14 11:54:21,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 304 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:21,428 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 202 flow [2024-06-14 11:54:21,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-14 11:54:21,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-14 11:54:21,429 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 202 flow [2024-06-14 11:54:21,429 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 11:54:21,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:21,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:21,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:54:21,429 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 11:54:21,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1073115817, now seen corresponding path program 1 times [2024-06-14 11:54:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:21,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795140027] [2024-06-14 11:54:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:21,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:22,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:22,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795140027] [2024-06-14 11:54:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795140027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:22,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:22,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:54:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803997144] [2024-06-14 11:54:22,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:54:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:54:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:54:22,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:22,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 202 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 11:54:22,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:22,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:22,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:22,820 INFO L124 PetriNetUnfolderBase]: 1571/2468 cut-off events. [2024-06-14 11:54:22,820 INFO L125 PetriNetUnfolderBase]: For 3658/3658 co-relation queries the response was YES. [2024-06-14 11:54:22,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7212 conditions, 2468 events. 1571/2468 cut-off events. For 3658/3658 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12588 event pairs, 706 based on Foata normal form. 2/2459 useless extension candidates. Maximal degree in co-relation 7191. Up to 2317 conditions per place. [2024-06-14 11:54:22,836 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-14 11:54:22,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 378 flow [2024-06-14 11:54:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:54:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:54:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:54:22,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:54:22,839 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 202 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:54:22,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 378 flow [2024-06-14 11:54:22,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:22,842 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 236 flow [2024-06-14 11:54:22,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-14 11:54:22,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-14 11:54:22,847 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 236 flow [2024-06-14 11:54:22,847 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 11:54:22,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:22,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:54:22,851 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 11:54:22,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash -871422782, now seen corresponding path program 1 times [2024-06-14 11:54:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:22,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642078230] [2024-06-14 11:54:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:23,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:23,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642078230] [2024-06-14 11:54:23,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642078230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:23,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:54:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730800805] [2024-06-14 11:54:23,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:23,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:54:23,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:54:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:54:23,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:23,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 236 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 11:54:23,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:23,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:23,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:24,249 INFO L124 PetriNetUnfolderBase]: 1717/2638 cut-off events. [2024-06-14 11:54:24,249 INFO L125 PetriNetUnfolderBase]: For 6206/6212 co-relation queries the response was YES. [2024-06-14 11:54:24,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8442 conditions, 2638 events. 1717/2638 cut-off events. For 6206/6212 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13230 event pairs, 749 based on Foata normal form. 6/2635 useless extension candidates. Maximal degree in co-relation 8420. Up to 2498 conditions per place. [2024-06-14 11:54:24,265 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 11:54:24,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 486 flow [2024-06-14 11:54:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:54:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:54:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 11:54:24,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-14 11:54:24,267 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 236 flow. Second operand 6 states and 127 transitions. [2024-06-14 11:54:24,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 486 flow [2024-06-14 11:54:24,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 456 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:24,272 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 292 flow [2024-06-14 11:54:24,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 11:54:24,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 11:54:24,275 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 292 flow [2024-06-14 11:54:24,275 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 11:54:24,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:24,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:24,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:54:24,276 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 11:54:24,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2095013102, now seen corresponding path program 2 times [2024-06-14 11:54:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:24,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878693176] [2024-06-14 11:54:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:24,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:25,079 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 11:54:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878693176] [2024-06-14 11:54:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878693176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:25,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:25,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:54:25,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57057750] [2024-06-14 11:54:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:25,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:54:25,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:54:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:54:25,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:25,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 292 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 11:54:25,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:25,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:25,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:25,672 INFO L124 PetriNetUnfolderBase]: 1712/2632 cut-off events. [2024-06-14 11:54:25,672 INFO L125 PetriNetUnfolderBase]: For 8384/8390 co-relation queries the response was YES. [2024-06-14 11:54:25,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9044 conditions, 2632 events. 1712/2632 cut-off events. For 8384/8390 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13229 event pairs, 752 based on Foata normal form. 6/2628 useless extension candidates. Maximal degree in co-relation 9021. Up to 2493 conditions per place. [2024-06-14 11:54:25,685 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-14 11:54:25,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 460 flow [2024-06-14 11:54:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:54:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:54:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 11:54:25,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:54:25,687 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 292 flow. Second operand 6 states and 122 transitions. [2024-06-14 11:54:25,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 460 flow [2024-06-14 11:54:25,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 426 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 11:54:25,691 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 298 flow [2024-06-14 11:54:25,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-14 11:54:25,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-14 11:54:25,692 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 298 flow [2024-06-14 11:54:25,692 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 11:54:25,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:25,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:25,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:54:25,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:25,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2062846758, now seen corresponding path program 1 times [2024-06-14 11:54:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:25,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83838764] [2024-06-14 11:54:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:25,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83838764] [2024-06-14 11:54:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83838764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:26,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:26,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392459974] [2024-06-14 11:54:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:26,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:26,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:26,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:26,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:26,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:26,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:27,248 INFO L124 PetriNetUnfolderBase]: 1567/2475 cut-off events. [2024-06-14 11:54:27,248 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-14 11:54:27,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8431 conditions, 2475 events. 1567/2475 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12697 event pairs, 652 based on Foata normal form. 4/2466 useless extension candidates. Maximal degree in co-relation 8406. Up to 2294 conditions per place. [2024-06-14 11:54:27,265 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 60 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-14 11:54:27,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 520 flow [2024-06-14 11:54:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:54:27,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:54:27,267 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 298 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:54:27,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 520 flow [2024-06-14 11:54:27,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 476 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:27,273 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 320 flow [2024-06-14 11:54:27,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-14 11:54:27,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-14 11:54:27,275 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 320 flow [2024-06-14 11:54:27,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:27,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:27,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:27,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:54:27,276 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 11:54:27,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -482938248, now seen corresponding path program 1 times [2024-06-14 11:54:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:27,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792459053] [2024-06-14 11:54:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:27,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:28,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792459053] [2024-06-14 11:54:28,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792459053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:28,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:28,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81182695] [2024-06-14 11:54:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:28,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:28,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:28,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:28,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:28,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:28,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:28,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:28,797 INFO L124 PetriNetUnfolderBase]: 1713/2637 cut-off events. [2024-06-14 11:54:28,798 INFO L125 PetriNetUnfolderBase]: For 12167/12167 co-relation queries the response was YES. [2024-06-14 11:54:28,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9759 conditions, 2637 events. 1713/2637 cut-off events. For 12167/12167 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13265 event pairs, 700 based on Foata normal form. 2/2636 useless extension candidates. Maximal degree in co-relation 9734. Up to 2498 conditions per place. [2024-06-14 11:54:28,810 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 67 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-14 11:54:28,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 572 flow [2024-06-14 11:54:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 11:54:28,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 11:54:28,814 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 320 flow. Second operand 7 states and 144 transitions. [2024-06-14 11:54:28,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 572 flow [2024-06-14 11:54:28,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 530 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:28,822 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 346 flow [2024-06-14 11:54:28,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-14 11:54:28,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-14 11:54:28,823 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 346 flow [2024-06-14 11:54:28,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:28,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:28,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:28,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:54:28,824 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 11:54:28,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1244301016, now seen corresponding path program 2 times [2024-06-14 11:54:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577762663] [2024-06-14 11:54:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577762663] [2024-06-14 11:54:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577762663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:29,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921384375] [2024-06-14 11:54:29,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:29,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:29,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:29,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:29,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:29,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:29,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:29,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:30,367 INFO L124 PetriNetUnfolderBase]: 1722/2661 cut-off events. [2024-06-14 11:54:30,368 INFO L125 PetriNetUnfolderBase]: For 15409/15415 co-relation queries the response was YES. [2024-06-14 11:54:30,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10412 conditions, 2661 events. 1722/2661 cut-off events. For 15409/15415 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13498 event pairs, 702 based on Foata normal form. 6/2663 useless extension candidates. Maximal degree in co-relation 10386. Up to 2465 conditions per place. [2024-06-14 11:54:30,380 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 60 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-14 11:54:30,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 678 flow [2024-06-14 11:54:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 11:54:30,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:54:30,381 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 346 flow. Second operand 7 states and 147 transitions. [2024-06-14 11:54:30,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 678 flow [2024-06-14 11:54:30,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 634 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:30,387 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 432 flow [2024-06-14 11:54:30,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-14 11:54:30,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-14 11:54:30,388 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 432 flow [2024-06-14 11:54:30,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:30,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:30,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:30,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:54:30,389 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 11:54:30,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash -478770890, now seen corresponding path program 1 times [2024-06-14 11:54:30,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:30,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630937251] [2024-06-14 11:54:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:31,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630937251] [2024-06-14 11:54:31,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630937251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:31,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:31,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167700406] [2024-06-14 11:54:31,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:31,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:31,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:31,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:31,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 432 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 11:54:31,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:31,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:31,944 INFO L124 PetriNetUnfolderBase]: 1844/2788 cut-off events. [2024-06-14 11:54:31,944 INFO L125 PetriNetUnfolderBase]: For 19125/19131 co-relation queries the response was YES. [2024-06-14 11:54:31,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11477 conditions, 2788 events. 1844/2788 cut-off events. For 19125/19131 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13725 event pairs, 752 based on Foata normal form. 3/2787 useless extension candidates. Maximal degree in co-relation 11450. Up to 2651 conditions per place. [2024-06-14 11:54:31,958 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-14 11:54:31,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 99 transitions, 776 flow [2024-06-14 11:54:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 11:54:31,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 11:54:31,959 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 432 flow. Second operand 7 states and 141 transitions. [2024-06-14 11:54:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 99 transitions, 776 flow [2024-06-14 11:54:31,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 734 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:31,968 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 506 flow [2024-06-14 11:54:31,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-14 11:54:31,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2024-06-14 11:54:31,969 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 506 flow [2024-06-14 11:54:31,969 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 11:54:31,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:31,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:31,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:54:31,970 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 11:54:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:31,970 INFO L85 PathProgramCache]: Analyzing trace with hash 520898358, now seen corresponding path program 2 times [2024-06-14 11:54:31,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:31,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672383074] [2024-06-14 11:54:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:31,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672383074] [2024-06-14 11:54:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672383074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:32,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373236512] [2024-06-14 11:54:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:32,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:32,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:32,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:32,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:32,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 506 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 11:54:32,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:32,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:32,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:33,473 INFO L124 PetriNetUnfolderBase]: 1855/2805 cut-off events. [2024-06-14 11:54:33,474 INFO L125 PetriNetUnfolderBase]: For 22696/22702 co-relation queries the response was YES. [2024-06-14 11:54:33,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12201 conditions, 2805 events. 1855/2805 cut-off events. For 22696/22702 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13778 event pairs, 751 based on Foata normal form. 6/2806 useless extension candidates. Maximal degree in co-relation 12172. Up to 2663 conditions per place. [2024-06-14 11:54:33,488 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-14 11:54:33,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 824 flow [2024-06-14 11:54:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:54:33,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:54:33,489 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 506 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:54:33,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 824 flow [2024-06-14 11:54:33,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 788 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:33,505 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 564 flow [2024-06-14 11:54:33,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=564, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-14 11:54:33,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-14 11:54:33,505 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 564 flow [2024-06-14 11:54:33,506 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 11:54:33,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:33,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:33,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:54:33,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:33,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash -472341986, now seen corresponding path program 3 times [2024-06-14 11:54:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:33,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139403846] [2024-06-14 11:54:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:34,267 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 11:54:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139403846] [2024-06-14 11:54:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139403846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:34,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:34,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807380655] [2024-06-14 11:54:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:34,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:34,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:34,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 564 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:34,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:34,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:34,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:34,955 INFO L124 PetriNetUnfolderBase]: 1745/2690 cut-off events. [2024-06-14 11:54:34,955 INFO L125 PetriNetUnfolderBase]: For 25550/25553 co-relation queries the response was YES. [2024-06-14 11:54:34,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12038 conditions, 2690 events. 1745/2690 cut-off events. For 25550/25553 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13544 event pairs, 706 based on Foata normal form. 2/2685 useless extension candidates. Maximal degree in co-relation 12007. Up to 2487 conditions per place. [2024-06-14 11:54:34,997 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 61 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-14 11:54:34,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 786 flow [2024-06-14 11:54:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 11:54:34,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 11:54:34,999 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 564 flow. Second operand 7 states and 142 transitions. [2024-06-14 11:54:34,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 786 flow [2024-06-14 11:54:35,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 692 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:35,012 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 530 flow [2024-06-14 11:54:35,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2024-06-14 11:54:35,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-14 11:54:35,013 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 530 flow [2024-06-14 11:54:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:35,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:35,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:35,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:54:35,014 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 11:54:35,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash -644825180, now seen corresponding path program 3 times [2024-06-14 11:54:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230245641] [2024-06-14 11:54:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:35,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:35,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:35,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230245641] [2024-06-14 11:54:35,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230245641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:35,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:35,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663423266] [2024-06-14 11:54:35,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:35,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:35,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:35,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 530 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 11:54:35,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:35,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:35,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:36,427 INFO L124 PetriNetUnfolderBase]: 1845/2791 cut-off events. [2024-06-14 11:54:36,427 INFO L125 PetriNetUnfolderBase]: For 28383/28389 co-relation queries the response was YES. [2024-06-14 11:54:36,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12632 conditions, 2791 events. 1845/2791 cut-off events. For 28383/28389 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13758 event pairs, 751 based on Foata normal form. 6/2792 useless extension candidates. Maximal degree in co-relation 12600. Up to 2651 conditions per place. [2024-06-14 11:54:36,468 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 65 selfloop transitions, 27 changer transitions 0/97 dead transitions. [2024-06-14 11:54:36,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 762 flow [2024-06-14 11:54:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 11:54:36,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 11:54:36,470 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 530 flow. Second operand 7 states and 135 transitions. [2024-06-14 11:54:36,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 762 flow [2024-06-14 11:54:36,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 678 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:36,485 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 508 flow [2024-06-14 11:54:36,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-14 11:54:36,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 11:54:36,486 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 508 flow [2024-06-14 11:54:36,486 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 11:54:36,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:36,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:36,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:54:36,486 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:36,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:36,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1547456478, now seen corresponding path program 1 times [2024-06-14 11:54:36,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:36,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460531804] [2024-06-14 11:54:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:36,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:37,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460531804] [2024-06-14 11:54:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460531804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:37,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:37,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:54:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622801886] [2024-06-14 11:54:37,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:37,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:54:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:54:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:54:37,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:54:37,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 508 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 11:54:37,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:37,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:54:37,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:37,641 INFO L124 PetriNetUnfolderBase]: 1386/2315 cut-off events. [2024-06-14 11:54:37,641 INFO L125 PetriNetUnfolderBase]: For 26288/26288 co-relation queries the response was YES. [2024-06-14 11:54:37,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10493 conditions, 2315 events. 1386/2315 cut-off events. For 26288/26288 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12690 event pairs, 588 based on Foata normal form. 1/2313 useless extension candidates. Maximal degree in co-relation 10460. Up to 2045 conditions per place. [2024-06-14 11:54:37,654 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 63 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-06-14 11:54:37,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 690 flow [2024-06-14 11:54:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:54:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:54:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-14 11:54:37,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 11:54:37,655 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 508 flow. Second operand 5 states and 106 transitions. [2024-06-14 11:54:37,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 690 flow [2024-06-14 11:54:37,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 626 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:37,668 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 492 flow [2024-06-14 11:54:37,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-14 11:54:37,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-14 11:54:37,669 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 492 flow [2024-06-14 11:54:37,669 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 11:54:37,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:37,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:54:37,670 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 11:54:37,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1337440360, now seen corresponding path program 1 times [2024-06-14 11:54:37,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:37,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106938710] [2024-06-14 11:54:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:37,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106938710] [2024-06-14 11:54:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106938710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:38,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532857779] [2024-06-14 11:54:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:38,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:38,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 492 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 11:54:38,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:39,367 INFO L124 PetriNetUnfolderBase]: 1853/2797 cut-off events. [2024-06-14 11:54:39,367 INFO L125 PetriNetUnfolderBase]: For 34667/34667 co-relation queries the response was YES. [2024-06-14 11:54:39,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13380 conditions, 2797 events. 1853/2797 cut-off events. For 34667/34667 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13683 event pairs, 722 based on Foata normal form. 2/2796 useless extension candidates. Maximal degree in co-relation 13346. Up to 2693 conditions per place. [2024-06-14 11:54:39,381 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 91 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-14 11:54:39,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 818 flow [2024-06-14 11:54:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:54:39,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:54:39,384 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 492 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:54:39,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 818 flow [2024-06-14 11:54:39,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 792 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:39,398 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 550 flow [2024-06-14 11:54:39,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=550, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-14 11:54:39,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-14 11:54:39,399 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 550 flow [2024-06-14 11:54:39,399 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 11:54:39,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:39,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:54:39,400 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 11:54:39,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash 81375804, now seen corresponding path program 2 times [2024-06-14 11:54:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:39,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738295122] [2024-06-14 11:54:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:40,331 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 11:54:40,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738295122] [2024-06-14 11:54:40,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738295122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:40,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:40,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044319574] [2024-06-14 11:54:40,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:40,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:40,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 550 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 11:54:40,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:40,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:40,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:41,177 INFO L124 PetriNetUnfolderBase]: 1880/2846 cut-off events. [2024-06-14 11:54:41,178 INFO L125 PetriNetUnfolderBase]: For 40293/40296 co-relation queries the response was YES. [2024-06-14 11:54:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14287 conditions, 2846 events. 1880/2846 cut-off events. For 40293/40296 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14027 event pairs, 730 based on Foata normal form. 2/2844 useless extension candidates. Maximal degree in co-relation 14252. Up to 2610 conditions per place. [2024-06-14 11:54:41,192 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 43 changer transitions 0/123 dead transitions. [2024-06-14 11:54:41,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 1110 flow [2024-06-14 11:54:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 11:54:41,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 11:54:41,194 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 550 flow. Second operand 8 states and 164 transitions. [2024-06-14 11:54:41,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 1110 flow [2024-06-14 11:54:41,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1050 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:41,210 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 716 flow [2024-06-14 11:54:41,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-14 11:54:41,211 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 11:54:41,211 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 716 flow [2024-06-14 11:54:41,211 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 11:54:41,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:41,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:41,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:54:41,212 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:41,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 81381601, now seen corresponding path program 1 times [2024-06-14 11:54:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:41,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035525679] [2024-06-14 11:54:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035525679] [2024-06-14 11:54:42,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035525679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:42,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:42,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407975249] [2024-06-14 11:54:42,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:42,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:42,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:42,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 716 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 11:54:42,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:42,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:42,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:42,896 INFO L124 PetriNetUnfolderBase]: 1902/2883 cut-off events. [2024-06-14 11:54:42,896 INFO L125 PetriNetUnfolderBase]: For 46761/46764 co-relation queries the response was YES. [2024-06-14 11:54:42,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15088 conditions, 2883 events. 1902/2883 cut-off events. For 46761/46764 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14269 event pairs, 680 based on Foata normal form. 4/2883 useless extension candidates. Maximal degree in co-relation 15052. Up to 2659 conditions per place. [2024-06-14 11:54:42,909 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-06-14 11:54:42,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 1180 flow [2024-06-14 11:54:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:54:42,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:54:42,910 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 716 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:54:42,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 1180 flow [2024-06-14 11:54:42,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 1116 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:42,928 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 802 flow [2024-06-14 11:54:42,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=802, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-06-14 11:54:42,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-14 11:54:42,929 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 802 flow [2024-06-14 11:54:42,929 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 11:54:42,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:42,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:42,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:54:42,929 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 11:54:42,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash 81381384, now seen corresponding path program 3 times [2024-06-14 11:54:42,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:42,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214057507] [2024-06-14 11:54:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:42,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:43,803 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 11:54:43,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:43,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214057507] [2024-06-14 11:54:43,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214057507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:43,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:43,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:43,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338605703] [2024-06-14 11:54:43,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:43,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:43,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:43,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:43,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:43,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 802 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 11:54:43,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:43,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:43,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:44,658 INFO L124 PetriNetUnfolderBase]: 1897/2876 cut-off events. [2024-06-14 11:54:44,658 INFO L125 PetriNetUnfolderBase]: For 51531/51534 co-relation queries the response was YES. [2024-06-14 11:54:44,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15671 conditions, 2876 events. 1897/2876 cut-off events. For 51531/51534 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14261 event pairs, 708 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 15633. Up to 2637 conditions per place. [2024-06-14 11:54:44,673 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 44 changer transitions 0/127 dead transitions. [2024-06-14 11:54:44,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 127 transitions, 1186 flow [2024-06-14 11:54:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:54:44,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 11:54:44,675 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 802 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:54:44,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 127 transitions, 1186 flow [2024-06-14 11:54:44,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1110 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:44,699 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 822 flow [2024-06-14 11:54:44,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=822, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-06-14 11:54:44,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 11:54:44,699 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 822 flow [2024-06-14 11:54:44,700 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 11:54:44,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:44,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:44,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:54:44,700 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 11:54:44,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1032024216, now seen corresponding path program 4 times [2024-06-14 11:54:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:44,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358312932] [2024-06-14 11:54:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:45,575 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 11:54:45,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358312932] [2024-06-14 11:54:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358312932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:45,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630354416] [2024-06-14 11:54:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:45,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:45,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:45,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:45,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 822 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 11:54:45,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:45,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:45,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:46,435 INFO L124 PetriNetUnfolderBase]: 1908/2895 cut-off events. [2024-06-14 11:54:46,436 INFO L125 PetriNetUnfolderBase]: For 56537/56540 co-relation queries the response was YES. [2024-06-14 11:54:46,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16104 conditions, 2895 events. 1908/2895 cut-off events. For 56537/56540 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14307 event pairs, 714 based on Foata normal form. 2/2890 useless extension candidates. Maximal degree in co-relation 16064. Up to 2649 conditions per place. [2024-06-14 11:54:46,453 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 47 changer transitions 0/127 dead transitions. [2024-06-14 11:54:46,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 1256 flow [2024-06-14 11:54:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:54:46,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:54:46,455 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 822 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:54:46,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 1256 flow [2024-06-14 11:54:46,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 127 transitions, 1154 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:54:46,482 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 876 flow [2024-06-14 11:54:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-14 11:54:46,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-14 11:54:46,483 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 876 flow [2024-06-14 11:54:46,483 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 11:54:46,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:46,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:46,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:54:46,483 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 11:54:46,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash 225272131, now seen corresponding path program 2 times [2024-06-14 11:54:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:46,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878831017] [2024-06-14 11:54:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:46,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:47,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:47,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878831017] [2024-06-14 11:54:47,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878831017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:47,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:47,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867845177] [2024-06-14 11:54:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:47,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:47,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:47,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 876 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 11:54:47,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:47,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:47,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:48,057 INFO L124 PetriNetUnfolderBase]: 1930/2930 cut-off events. [2024-06-14 11:54:48,057 INFO L125 PetriNetUnfolderBase]: For 61885/61891 co-relation queries the response was YES. [2024-06-14 11:54:48,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16520 conditions, 2930 events. 1930/2930 cut-off events. For 61885/61891 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14518 event pairs, 669 based on Foata normal form. 8/2933 useless extension candidates. Maximal degree in co-relation 16479. Up to 2687 conditions per place. [2024-06-14 11:54:48,073 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 35 changer transitions 0/133 dead transitions. [2024-06-14 11:54:48,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1320 flow [2024-06-14 11:54:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:54:48,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:54:48,075 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 876 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:54:48,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1320 flow [2024-06-14 11:54:48,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1176 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:48,104 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 852 flow [2024-06-14 11:54:48,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=852, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-06-14 11:54:48,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-14 11:54:48,104 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 852 flow [2024-06-14 11:54:48,105 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 11:54:48,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:48,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:48,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:54:48,105 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 11:54:48,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1757692462, now seen corresponding path program 5 times [2024-06-14 11:54:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490138402] [2024-06-14 11:54:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:48,971 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 11:54:48,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490138402] [2024-06-14 11:54:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490138402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:48,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:48,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800427636] [2024-06-14 11:54:48,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:48,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:49,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:49,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 852 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 11:54:49,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:49,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:49,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:49,801 INFO L124 PetriNetUnfolderBase]: 1941/2953 cut-off events. [2024-06-14 11:54:49,801 INFO L125 PetriNetUnfolderBase]: For 66634/66637 co-relation queries the response was YES. [2024-06-14 11:54:49,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16814 conditions, 2953 events. 1941/2953 cut-off events. For 66634/66637 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14672 event pairs, 719 based on Foata normal form. 2/2948 useless extension candidates. Maximal degree in co-relation 16772. Up to 2693 conditions per place. [2024-06-14 11:54:49,819 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 79 selfloop transitions, 49 changer transitions 0/133 dead transitions. [2024-06-14 11:54:49,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 133 transitions, 1294 flow [2024-06-14 11:54:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:54:49,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:54:49,821 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 852 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:54:49,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 133 transitions, 1294 flow [2024-06-14 11:54:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 1190 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:49,850 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 896 flow [2024-06-14 11:54:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2024-06-14 11:54:49,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-14 11:54:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 896 flow [2024-06-14 11:54:49,851 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 11:54:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:49,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:54:49,852 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 11:54:49,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1750073685, now seen corresponding path program 3 times [2024-06-14 11:54:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802374113] [2024-06-14 11:54:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:50,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:50,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802374113] [2024-06-14 11:54:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802374113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:50,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:50,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573065898] [2024-06-14 11:54:50,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:50,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:50,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:50,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 896 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 11:54:50,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:50,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:50,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:51,350 INFO L124 PetriNetUnfolderBase]: 1963/2988 cut-off events. [2024-06-14 11:54:51,351 INFO L125 PetriNetUnfolderBase]: For 72304/72310 co-relation queries the response was YES. [2024-06-14 11:54:51,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17190 conditions, 2988 events. 1963/2988 cut-off events. For 72304/72310 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14879 event pairs, 671 based on Foata normal form. 8/2991 useless extension candidates. Maximal degree in co-relation 17147. Up to 2722 conditions per place. [2024-06-14 11:54:51,367 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 41 changer transitions 0/138 dead transitions. [2024-06-14 11:54:51,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1356 flow [2024-06-14 11:54:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:54:51,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:54:51,369 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 896 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:54:51,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1356 flow [2024-06-14 11:54:51,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 138 transitions, 1244 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:51,398 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 916 flow [2024-06-14 11:54:51,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-14 11:54:51,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-14 11:54:51,399 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 916 flow [2024-06-14 11:54:51,399 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 11:54:51,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:51,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:51,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:54:51,399 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:51,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1750340812, now seen corresponding path program 6 times [2024-06-14 11:54:51,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:51,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048307361] [2024-06-14 11:54:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:51,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:52,177 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 11:54:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048307361] [2024-06-14 11:54:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048307361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:52,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993850646] [2024-06-14 11:54:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:52,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:52,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:52,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 916 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 11:54:52,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:52,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:52,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:52,971 INFO L124 PetriNetUnfolderBase]: 1958/2983 cut-off events. [2024-06-14 11:54:52,971 INFO L125 PetriNetUnfolderBase]: For 77082/77085 co-relation queries the response was YES. [2024-06-14 11:54:52,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17362 conditions, 2983 events. 1958/2983 cut-off events. For 77082/77085 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14903 event pairs, 719 based on Foata normal form. 2/2978 useless extension candidates. Maximal degree in co-relation 17318. Up to 2720 conditions per place. [2024-06-14 11:54:52,989 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 52 changer transitions 0/134 dead transitions. [2024-06-14 11:54:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 134 transitions, 1232 flow [2024-06-14 11:54:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:54:52,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:54:52,990 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 916 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:54:52,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 134 transitions, 1232 flow [2024-06-14 11:54:53,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 1102 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:53,027 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 898 flow [2024-06-14 11:54:53,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=898, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-14 11:54:53,027 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 11:54:53,027 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 898 flow [2024-06-14 11:54:53,027 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 11:54:53,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:53,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:54:53,028 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 11:54:53,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1750340595, now seen corresponding path program 4 times [2024-06-14 11:54:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624468218] [2024-06-14 11:54:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:53,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:53,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:53,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624468218] [2024-06-14 11:54:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624468218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:53,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:53,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780547120] [2024-06-14 11:54:53,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:53,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:53,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:53,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:53,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 898 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 11:54:53,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:53,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:53,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:54,707 INFO L124 PetriNetUnfolderBase]: 1948/2967 cut-off events. [2024-06-14 11:54:54,708 INFO L125 PetriNetUnfolderBase]: For 81596/81602 co-relation queries the response was YES. [2024-06-14 11:54:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17339 conditions, 2967 events. 1948/2967 cut-off events. For 81596/81602 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14785 event pairs, 669 based on Foata normal form. 8/2970 useless extension candidates. Maximal degree in co-relation 17294. Up to 2707 conditions per place. [2024-06-14 11:54:54,725 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-14 11:54:54,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 137 transitions, 1226 flow [2024-06-14 11:54:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:54:54,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:54:54,727 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 898 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:54:54,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 137 transitions, 1226 flow [2024-06-14 11:54:54,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 137 transitions, 1080 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 11:54:54,812 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 838 flow [2024-06-14 11:54:54,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-14 11:54:54,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 11:54:54,813 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 838 flow [2024-06-14 11:54:54,813 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 11:54:54,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:54,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:54,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:54:54,813 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:54,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash -726509008, now seen corresponding path program 1 times [2024-06-14 11:54:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072542323] [2024-06-14 11:54:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:55,891 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 11:54:55,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072542323] [2024-06-14 11:54:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072542323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:55,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:55,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:54:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131258398] [2024-06-14 11:54:55,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:55,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:54:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:54:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:54:55,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:54:55,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 838 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 11:54:55,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:55,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:54:55,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:56,322 INFO L124 PetriNetUnfolderBase]: 1470/2468 cut-off events. [2024-06-14 11:54:56,322 INFO L125 PetriNetUnfolderBase]: For 71867/71867 co-relation queries the response was YES. [2024-06-14 11:54:56,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14272 conditions, 2468 events. 1470/2468 cut-off events. For 71867/71867 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13646 event pairs, 564 based on Foata normal form. 2/2467 useless extension candidates. Maximal degree in co-relation 14226. Up to 2122 conditions per place. [2024-06-14 11:54:56,338 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 85 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-14 11:54:56,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 124 transitions, 1078 flow [2024-06-14 11:54:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:54:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:54:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 11:54:56,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 11:54:56,339 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 838 flow. Second operand 6 states and 124 transitions. [2024-06-14 11:54:56,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 124 transitions, 1078 flow [2024-06-14 11:54:56,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 124 transitions, 974 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:54:56,371 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 792 flow [2024-06-14 11:54:56,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=792, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2024-06-14 11:54:56,372 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 11:54:56,372 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 792 flow [2024-06-14 11:54:56,372 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 11:54:56,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:56,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:56,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:54:56,372 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 11:54:56,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash -542042701, now seen corresponding path program 1 times [2024-06-14 11:54:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:56,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114689428] [2024-06-14 11:54:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:56,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:57,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:57,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114689428] [2024-06-14 11:54:57,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114689428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:57,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:57,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104559238] [2024-06-14 11:54:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:57,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:57,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:57,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 792 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 11:54:57,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:57,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:57,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:58,042 INFO L124 PetriNetUnfolderBase]: 1881/2922 cut-off events. [2024-06-14 11:54:58,043 INFO L125 PetriNetUnfolderBase]: For 92322/92322 co-relation queries the response was YES. [2024-06-14 11:54:58,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17672 conditions, 2922 events. 1881/2922 cut-off events. For 92322/92322 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14976 event pairs, 464 based on Foata normal form. 4/2923 useless extension candidates. Maximal degree in co-relation 17625. Up to 2630 conditions per place. [2024-06-14 11:54:58,062 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 119 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-14 11:54:58,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1338 flow [2024-06-14 11:54:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:54:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:54:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 11:54:58,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:54:58,064 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 792 flow. Second operand 9 states and 183 transitions. [2024-06-14 11:54:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1338 flow [2024-06-14 11:54:58,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 155 transitions, 1302 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:58,124 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 883 flow [2024-06-14 11:54:58,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=883, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-14 11:54:58,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-14 11:54:58,124 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 883 flow [2024-06-14 11:54:58,124 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 11:54:58,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:58,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:58,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:54:58,125 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 11:54:58,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1887611835, now seen corresponding path program 2 times [2024-06-14 11:54:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:58,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366144102] [2024-06-14 11:54:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:58,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:59,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366144102] [2024-06-14 11:54:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366144102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:59,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:59,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439237178] [2024-06-14 11:54:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:59,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:54:59,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 883 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 11:54:59,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:59,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:54:59,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:59,746 INFO L124 PetriNetUnfolderBase]: 1873/2905 cut-off events. [2024-06-14 11:54:59,746 INFO L125 PetriNetUnfolderBase]: For 98327/98327 co-relation queries the response was YES. [2024-06-14 11:54:59,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17938 conditions, 2905 events. 1873/2905 cut-off events. For 98327/98327 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14871 event pairs, 622 based on Foata normal form. 4/2906 useless extension candidates. Maximal degree in co-relation 17890. Up to 2677 conditions per place. [2024-06-14 11:54:59,765 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 116 selfloop transitions, 16 changer transitions 0/148 dead transitions. [2024-06-14 11:54:59,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1223 flow [2024-06-14 11:54:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:54:59,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 11:54:59,767 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 883 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:54:59,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1223 flow [2024-06-14 11:54:59,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1139 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:59,840 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 838 flow [2024-06-14 11:54:59,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2024-06-14 11:54:59,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 11:54:59,841 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 838 flow [2024-06-14 11:54:59,841 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 11:54:59,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:59,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:59,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:54:59,841 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:59,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1887606875, now seen corresponding path program 1 times [2024-06-14 11:54:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:59,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113198369] [2024-06-14 11:54:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:00,833 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 11:55:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113198369] [2024-06-14 11:55:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113198369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:00,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:00,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036949955] [2024-06-14 11:55:00,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:00,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:00,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:00,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:00,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 838 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 11:55:00,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:00,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:00,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:01,496 INFO L124 PetriNetUnfolderBase]: 1995/3042 cut-off events. [2024-06-14 11:55:01,496 INFO L125 PetriNetUnfolderBase]: For 106526/106526 co-relation queries the response was YES. [2024-06-14 11:55:01,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18825 conditions, 3042 events. 1995/3042 cut-off events. For 106526/106526 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15182 event pairs, 646 based on Foata normal form. 4/3043 useless extension candidates. Maximal degree in co-relation 18775. Up to 2888 conditions per place. [2024-06-14 11:55:01,516 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 130 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-14 11:55:01,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1272 flow [2024-06-14 11:55:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 11:55:01,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 11:55:01,518 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 838 flow. Second operand 9 states and 173 transitions. [2024-06-14 11:55:01,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1272 flow [2024-06-14 11:55:01,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 155 transitions, 1235 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:01,569 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 903 flow [2024-06-14 11:55:01,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=903, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-14 11:55:01,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-14 11:55:01,570 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 903 flow [2024-06-14 11:55:01,570 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 11:55:01,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:01,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:55:01,571 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:01,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1772320665, now seen corresponding path program 3 times [2024-06-14 11:55:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892201817] [2024-06-14 11:55:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892201817] [2024-06-14 11:55:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892201817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875004863] [2024-06-14 11:55:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:02,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:02,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 903 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 11:55:02,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:02,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:02,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:03,241 INFO L124 PetriNetUnfolderBase]: 1909/2970 cut-off events. [2024-06-14 11:55:03,241 INFO L125 PetriNetUnfolderBase]: For 113988/113991 co-relation queries the response was YES. [2024-06-14 11:55:03,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19019 conditions, 2970 events. 1909/2970 cut-off events. For 113988/113991 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15275 event pairs, 605 based on Foata normal form. 6/2972 useless extension candidates. Maximal degree in co-relation 18968. Up to 2688 conditions per place. [2024-06-14 11:55:03,257 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 106 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-14 11:55:03,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 1283 flow [2024-06-14 11:55:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:55:03,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:55:03,259 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 903 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:55:03,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 1283 flow [2024-06-14 11:55:03,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1205 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:03,318 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 936 flow [2024-06-14 11:55:03,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-14 11:55:03,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-14 11:55:03,318 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 936 flow [2024-06-14 11:55:03,319 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 11:55:03,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:03,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:03,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:55:03,319 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:03,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1772315705, now seen corresponding path program 2 times [2024-06-14 11:55:03,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:03,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674757787] [2024-06-14 11:55:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:03,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:04,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674757787] [2024-06-14 11:55:04,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674757787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:04,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:04,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:04,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963093250] [2024-06-14 11:55:04,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:04,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:04,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:04,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:04,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 936 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 11:55:04,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:04,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:04,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:05,243 INFO L124 PetriNetUnfolderBase]: 2066/3165 cut-off events. [2024-06-14 11:55:05,243 INFO L125 PetriNetUnfolderBase]: For 126080/126083 co-relation queries the response was YES. [2024-06-14 11:55:05,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20566 conditions, 3165 events. 2066/3165 cut-off events. For 126080/126083 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16035 event pairs, 593 based on Foata normal form. 4/3165 useless extension candidates. Maximal degree in co-relation 20514. Up to 2656 conditions per place. [2024-06-14 11:55:05,263 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 64 changer transitions 0/171 dead transitions. [2024-06-14 11:55:05,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1762 flow [2024-06-14 11:55:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:55:05,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-14 11:55:05,265 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 936 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:55:05,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1762 flow [2024-06-14 11:55:05,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1669 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:05,328 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 1153 flow [2024-06-14 11:55:05,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1153, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2024-06-14 11:55:05,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-14 11:55:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 1153 flow [2024-06-14 11:55:05,329 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 11:55:05,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:05,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:05,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:55:05,329 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 11:55:05,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1208405157, now seen corresponding path program 3 times [2024-06-14 11:55:05,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:05,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163564713] [2024-06-14 11:55:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:05,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:06,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163564713] [2024-06-14 11:55:06,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163564713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:06,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:06,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:06,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533098058] [2024-06-14 11:55:06,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:06,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:06,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:06,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:06,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:06,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:06,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 1153 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 11:55:06,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:06,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:06,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:07,351 INFO L124 PetriNetUnfolderBase]: 2088/3202 cut-off events. [2024-06-14 11:55:07,352 INFO L125 PetriNetUnfolderBase]: For 136074/136077 co-relation queries the response was YES. [2024-06-14 11:55:07,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21443 conditions, 3202 events. 2088/3202 cut-off events. For 136074/136077 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16294 event pairs, 593 based on Foata normal form. 4/3202 useless extension candidates. Maximal degree in co-relation 21390. Up to 2675 conditions per place. [2024-06-14 11:55:07,374 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 101 selfloop transitions, 68 changer transitions 0/174 dead transitions. [2024-06-14 11:55:07,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 174 transitions, 1887 flow [2024-06-14 11:55:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:55:07,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:55:07,375 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 1153 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:55:07,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 174 transitions, 1887 flow [2024-06-14 11:55:07,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 174 transitions, 1785 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:07,455 INFO L231 Difference]: Finished difference. Result has 122 places, 135 transitions, 1257 flow [2024-06-14 11:55:07,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1257, PETRI_PLACES=122, PETRI_TRANSITIONS=135} [2024-06-14 11:55:07,456 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 77 predicate places. [2024-06-14 11:55:07,456 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 135 transitions, 1257 flow [2024-06-14 11:55:07,456 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 11:55:07,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:07,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:07,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:55:07,456 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:07,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:07,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1208398647, now seen corresponding path program 4 times [2024-06-14 11:55:07,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:07,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076419213] [2024-06-14 11:55:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:07,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076419213] [2024-06-14 11:55:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076419213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:08,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:08,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:08,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359972899] [2024-06-14 11:55:08,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:08,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:08,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 135 transitions, 1257 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 11:55:08,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:08,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:08,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:09,243 INFO L124 PetriNetUnfolderBase]: 2078/3188 cut-off events. [2024-06-14 11:55:09,243 INFO L125 PetriNetUnfolderBase]: For 141250/141253 co-relation queries the response was YES. [2024-06-14 11:55:09,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21608 conditions, 3188 events. 2078/3188 cut-off events. For 141250/141253 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16218 event pairs, 593 based on Foata normal form. 4/3188 useless extension candidates. Maximal degree in co-relation 21553. Up to 2667 conditions per place. [2024-06-14 11:55:09,265 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 70 changer transitions 0/171 dead transitions. [2024-06-14 11:55:09,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1801 flow [2024-06-14 11:55:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:55:09,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:55:09,266 INFO L175 Difference]: Start difference. First operand has 122 places, 135 transitions, 1257 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:55:09,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1801 flow [2024-06-14 11:55:09,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 171 transitions, 1587 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:09,324 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1191 flow [2024-06-14 11:55:09,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1191, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-14 11:55:09,324 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 11:55:09,324 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1191 flow [2024-06-14 11:55:09,325 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 11:55:09,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:09,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:55:09,325 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:09,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1047402525, now seen corresponding path program 1 times [2024-06-14 11:55:09,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:09,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912696283] [2024-06-14 11:55:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:09,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:10,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:10,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912696283] [2024-06-14 11:55:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912696283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:10,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957519826] [2024-06-14 11:55:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:10,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:10,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:10,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1191 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 11:55:10,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:10,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:10,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:10,652 INFO L124 PetriNetUnfolderBase]: 1801/2901 cut-off events. [2024-06-14 11:55:10,652 INFO L125 PetriNetUnfolderBase]: For 144892/144900 co-relation queries the response was YES. [2024-06-14 11:55:10,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 2901 events. 1801/2901 cut-off events. For 144892/144900 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15747 event pairs, 599 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 20165. Up to 2608 conditions per place. [2024-06-14 11:55:10,673 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 113 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-14 11:55:10,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1513 flow [2024-06-14 11:55:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 11:55:10,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 11:55:10,674 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1191 flow. Second operand 6 states and 124 transitions. [2024-06-14 11:55:10,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1513 flow [2024-06-14 11:55:10,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 1365 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:10,742 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1114 flow [2024-06-14 11:55:10,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-14 11:55:10,742 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 77 predicate places. [2024-06-14 11:55:10,742 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1114 flow [2024-06-14 11:55:10,742 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 11:55:10,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:10,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:10,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:55:10,743 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 11:55:10,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:10,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1345932253, now seen corresponding path program 4 times [2024-06-14 11:55:10,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:10,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516547225] [2024-06-14 11:55:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:10,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:11,575 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 11:55:11,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:11,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516547225] [2024-06-14 11:55:11,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516547225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:11,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:11,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:11,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570363929] [2024-06-14 11:55:11,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:11,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:11,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:11,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1114 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 11:55:11,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:11,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:11,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:12,351 INFO L124 PetriNetUnfolderBase]: 1969/3080 cut-off events. [2024-06-14 11:55:12,351 INFO L125 PetriNetUnfolderBase]: For 151937/151940 co-relation queries the response was YES. [2024-06-14 11:55:12,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21192 conditions, 3080 events. 1969/3080 cut-off events. For 151937/151940 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16065 event pairs, 617 based on Foata normal form. 4/3077 useless extension candidates. Maximal degree in co-relation 21135. Up to 2778 conditions per place. [2024-06-14 11:55:12,371 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 120 selfloop transitions, 28 changer transitions 0/164 dead transitions. [2024-06-14 11:55:12,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 164 transitions, 1520 flow [2024-06-14 11:55:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:55:12,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:12,373 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1114 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:55:12,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 164 transitions, 1520 flow [2024-06-14 11:55:12,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 164 transitions, 1473 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:12,449 INFO L231 Difference]: Finished difference. Result has 126 places, 140 transitions, 1184 flow [2024-06-14 11:55:12,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=126, PETRI_TRANSITIONS=140} [2024-06-14 11:55:12,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-14 11:55:12,450 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 140 transitions, 1184 flow [2024-06-14 11:55:12,450 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 11:55:12,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:12,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:55:12,451 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 11:55:12,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1345937213, now seen corresponding path program 5 times [2024-06-14 11:55:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:12,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792750874] [2024-06-14 11:55:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:12,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792750874] [2024-06-14 11:55:13,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792750874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:13,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:13,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:13,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934984157] [2024-06-14 11:55:13,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:13,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:13,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 140 transitions, 1184 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 11:55:13,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:13,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:13,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:14,231 INFO L124 PetriNetUnfolderBase]: 2102/3232 cut-off events. [2024-06-14 11:55:14,232 INFO L125 PetriNetUnfolderBase]: For 162714/162717 co-relation queries the response was YES. [2024-06-14 11:55:14,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22445 conditions, 3232 events. 2102/3232 cut-off events. For 162714/162717 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16461 event pairs, 591 based on Foata normal form. 4/3229 useless extension candidates. Maximal degree in co-relation 22387. Up to 2688 conditions per place. [2024-06-14 11:55:14,254 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 98 selfloop transitions, 73 changer transitions 0/176 dead transitions. [2024-06-14 11:55:14,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1802 flow [2024-06-14 11:55:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:55:14,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-14 11:55:14,255 INFO L175 Difference]: Start difference. First operand has 126 places, 140 transitions, 1184 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:55:14,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1802 flow [2024-06-14 11:55:14,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 176 transitions, 1703 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:14,314 INFO L231 Difference]: Finished difference. Result has 129 places, 143 transitions, 1301 flow [2024-06-14 11:55:14,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1301, PETRI_PLACES=129, PETRI_TRANSITIONS=143} [2024-06-14 11:55:14,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-14 11:55:14,315 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 143 transitions, 1301 flow [2024-06-14 11:55:14,315 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 11:55:14,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:14,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:55:14,315 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:14,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1346116703, now seen corresponding path program 6 times [2024-06-14 11:55:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:14,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540141039] [2024-06-14 11:55:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:15,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540141039] [2024-06-14 11:55:15,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540141039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:15,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:15,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990982082] [2024-06-14 11:55:15,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:15,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:15,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:15,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:15,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:15,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 143 transitions, 1301 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 11:55:15,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:15,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:15,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:16,174 INFO L124 PetriNetUnfolderBase]: 2156/3325 cut-off events. [2024-06-14 11:55:16,174 INFO L125 PetriNetUnfolderBase]: For 175393/175396 co-relation queries the response was YES. [2024-06-14 11:55:16,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23571 conditions, 3325 events. 2156/3325 cut-off events. For 175393/175396 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17141 event pairs, 593 based on Foata normal form. 4/3322 useless extension candidates. Maximal degree in co-relation 23512. Up to 2734 conditions per place. [2024-06-14 11:55:16,199 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 77 changer transitions 0/184 dead transitions. [2024-06-14 11:55:16,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 2155 flow [2024-06-14 11:55:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:55:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:55:16,201 INFO L175 Difference]: Start difference. First operand has 129 places, 143 transitions, 1301 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:55:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 2155 flow [2024-06-14 11:55:16,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 184 transitions, 1905 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:16,270 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1349 flow [2024-06-14 11:55:16,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1349, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-14 11:55:16,271 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 11:55:16,271 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1349 flow [2024-06-14 11:55:16,271 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 11:55:16,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:16,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:16,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:55:16,272 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:16,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1346110193, now seen corresponding path program 7 times [2024-06-14 11:55:16,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:16,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285205464] [2024-06-14 11:55:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:17,247 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 11:55:17,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:17,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285205464] [2024-06-14 11:55:17,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285205464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:17,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:17,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:17,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786267109] [2024-06-14 11:55:17,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:17,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:17,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:17,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:17,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:17,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1349 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 11:55:17,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:17,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:17,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:18,255 INFO L124 PetriNetUnfolderBase]: 2146/3311 cut-off events. [2024-06-14 11:55:18,255 INFO L125 PetriNetUnfolderBase]: For 179756/179759 co-relation queries the response was YES. [2024-06-14 11:55:18,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23379 conditions, 3311 events. 2146/3311 cut-off events. For 179756/179759 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17099 event pairs, 591 based on Foata normal form. 4/3308 useless extension candidates. Maximal degree in co-relation 23319. Up to 2726 conditions per place. [2024-06-14 11:55:18,277 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 76 changer transitions 0/183 dead transitions. [2024-06-14 11:55:18,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 183 transitions, 1929 flow [2024-06-14 11:55:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:55:18,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:55:18,278 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1349 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:55:18,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 183 transitions, 1929 flow [2024-06-14 11:55:18,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1729 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:18,369 INFO L231 Difference]: Finished difference. Result has 135 places, 149 transitions, 1309 flow [2024-06-14 11:55:18,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=135, PETRI_TRANSITIONS=149} [2024-06-14 11:55:18,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-14 11:55:18,370 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 149 transitions, 1309 flow [2024-06-14 11:55:18,370 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 11:55:18,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:18,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:18,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:55:18,371 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 11:55:18,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1582292063, now seen corresponding path program 8 times [2024-06-14 11:55:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:18,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819806581] [2024-06-14 11:55:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:19,270 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 11:55:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:19,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819806581] [2024-06-14 11:55:19,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819806581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:19,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:19,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153427040] [2024-06-14 11:55:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:19,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:19,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 149 transitions, 1309 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 11:55:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:20,224 INFO L124 PetriNetUnfolderBase]: 2168/3348 cut-off events. [2024-06-14 11:55:20,225 INFO L125 PetriNetUnfolderBase]: For 188788/188791 co-relation queries the response was YES. [2024-06-14 11:55:20,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23674 conditions, 3348 events. 2168/3348 cut-off events. For 188788/188791 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17321 event pairs, 598 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 23613. Up to 2745 conditions per place. [2024-06-14 11:55:20,249 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 90 selfloop transitions, 89 changer transitions 0/184 dead transitions. [2024-06-14 11:55:20,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 184 transitions, 1952 flow [2024-06-14 11:55:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 11:55:20,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:55:20,251 INFO L175 Difference]: Start difference. First operand has 135 places, 149 transitions, 1309 flow. Second operand 9 states and 179 transitions. [2024-06-14 11:55:20,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 184 transitions, 1952 flow [2024-06-14 11:55:20,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 184 transitions, 1786 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:20,343 INFO L231 Difference]: Finished difference. Result has 136 places, 152 transitions, 1390 flow [2024-06-14 11:55:20,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1390, PETRI_PLACES=136, PETRI_TRANSITIONS=152} [2024-06-14 11:55:20,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-14 11:55:20,344 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 152 transitions, 1390 flow [2024-06-14 11:55:20,344 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 11:55:20,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:55:20,345 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 11:55:20,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1574011343, now seen corresponding path program 9 times [2024-06-14 11:55:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:20,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775541359] [2024-06-14 11:55:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:21,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:21,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775541359] [2024-06-14 11:55:21,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775541359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:21,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:21,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601996179] [2024-06-14 11:55:21,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:21,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:21,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 152 transitions, 1390 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 11:55:21,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:21,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:21,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:22,169 INFO L124 PetriNetUnfolderBase]: 2190/3390 cut-off events. [2024-06-14 11:55:22,170 INFO L125 PetriNetUnfolderBase]: For 198664/198667 co-relation queries the response was YES. [2024-06-14 11:55:22,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24210 conditions, 3390 events. 2190/3390 cut-off events. For 198664/198667 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17654 event pairs, 596 based on Foata normal form. 4/3387 useless extension candidates. Maximal degree in co-relation 24148. Up to 2764 conditions per place. [2024-06-14 11:55:22,194 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 97 selfloop transitions, 86 changer transitions 0/188 dead transitions. [2024-06-14 11:55:22,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 188 transitions, 2047 flow [2024-06-14 11:55:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:55:22,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-14 11:55:22,196 INFO L175 Difference]: Start difference. First operand has 136 places, 152 transitions, 1390 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:55:22,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 188 transitions, 2047 flow [2024-06-14 11:55:22,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 188 transitions, 1857 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:22,299 INFO L231 Difference]: Finished difference. Result has 139 places, 155 transitions, 1441 flow [2024-06-14 11:55:22,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1441, PETRI_PLACES=139, PETRI_TRANSITIONS=155} [2024-06-14 11:55:22,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:55:22,299 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 155 transitions, 1441 flow [2024-06-14 11:55:22,300 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 11:55:22,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:22,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:22,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:55:22,300 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 11:55:22,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1352372813, now seen corresponding path program 10 times [2024-06-14 11:55:22,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:22,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257226394] [2024-06-14 11:55:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:23,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257226394] [2024-06-14 11:55:23,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257226394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:23,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:23,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:23,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144222577] [2024-06-14 11:55:23,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:23,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:23,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:23,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:23,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 155 transitions, 1441 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 11:55:23,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:23,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:23,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:24,107 INFO L124 PetriNetUnfolderBase]: 2180/3376 cut-off events. [2024-06-14 11:55:24,107 INFO L125 PetriNetUnfolderBase]: For 204458/204461 co-relation queries the response was YES. [2024-06-14 11:55:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24083 conditions, 3376 events. 2180/3376 cut-off events. For 204458/204461 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17508 event pairs, 596 based on Foata normal form. 4/3373 useless extension candidates. Maximal degree in co-relation 24020. Up to 2756 conditions per place. [2024-06-14 11:55:24,132 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 85 changer transitions 0/186 dead transitions. [2024-06-14 11:55:24,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 1879 flow [2024-06-14 11:55:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 11:55:24,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:24,156 INFO L175 Difference]: Start difference. First operand has 139 places, 155 transitions, 1441 flow. Second operand 9 states and 180 transitions. [2024-06-14 11:55:24,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 1879 flow [2024-06-14 11:55:24,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 1607 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:24,261 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1347 flow [2024-06-14 11:55:24,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-14 11:55:24,263 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 11:55:24,263 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1347 flow [2024-06-14 11:55:24,263 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 11:55:24,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:24,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:24,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:55:24,264 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:24,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1059901725, now seen corresponding path program 2 times [2024-06-14 11:55:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116479656] [2024-06-14 11:55:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:24,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:24,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116479656] [2024-06-14 11:55:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116479656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:24,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:24,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:24,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88569146] [2024-06-14 11:55:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:24,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:24,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:25,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:25,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1347 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 11:55:25,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:25,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:25,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:25,473 INFO L124 PetriNetUnfolderBase]: 1853/3002 cut-off events. [2024-06-14 11:55:25,473 INFO L125 PetriNetUnfolderBase]: For 206732/206732 co-relation queries the response was YES. [2024-06-14 11:55:25,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22354 conditions, 3002 events. 1853/3002 cut-off events. For 206732/206732 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16550 event pairs, 602 based on Foata normal form. 1/2973 useless extension candidates. Maximal degree in co-relation 22290. Up to 2685 conditions per place. [2024-06-14 11:55:25,498 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 122 selfloop transitions, 18 changer transitions 0/167 dead transitions. [2024-06-14 11:55:25,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 167 transitions, 1687 flow [2024-06-14 11:55:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:55:25,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:25,499 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1347 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:55:25,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 167 transitions, 1687 flow [2024-06-14 11:55:25,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 167 transitions, 1463 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 11:55:25,624 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1209 flow [2024-06-14 11:55:25,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-14 11:55:25,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 11:55:25,625 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1209 flow [2024-06-14 11:55:25,625 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 11:55:25,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:25,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:25,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:55:25,626 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:25,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 338063487, now seen corresponding path program 1 times [2024-06-14 11:55:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:25,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818977535] [2024-06-14 11:55:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:25,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:26,267 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 11:55:26,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:26,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818977535] [2024-06-14 11:55:26,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818977535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:26,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853441751] [2024-06-14 11:55:26,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:26,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:26,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:26,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1209 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 11:55:26,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:26,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:26,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:26,809 INFO L124 PetriNetUnfolderBase]: 1831/3011 cut-off events. [2024-06-14 11:55:26,809 INFO L125 PetriNetUnfolderBase]: For 182967/182967 co-relation queries the response was YES. [2024-06-14 11:55:26,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20915 conditions, 3011 events. 1831/3011 cut-off events. For 182967/182967 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16661 event pairs, 523 based on Foata normal form. 1/3009 useless extension candidates. Maximal degree in co-relation 20850. Up to 2675 conditions per place. [2024-06-14 11:55:26,833 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 145 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-06-14 11:55:26,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1589 flow [2024-06-14 11:55:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 11:55:26,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 11:55:26,835 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1209 flow. Second operand 6 states and 121 transitions. [2024-06-14 11:55:26,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1589 flow [2024-06-14 11:55:26,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 173 transitions, 1525 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:26,937 INFO L231 Difference]: Finished difference. Result has 139 places, 161 transitions, 1217 flow [2024-06-14 11:55:26,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=139, PETRI_TRANSITIONS=161} [2024-06-14 11:55:26,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:55:26,938 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 161 transitions, 1217 flow [2024-06-14 11:55:26,938 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 11:55:26,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:26,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:26,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:55:26,939 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:26,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1046951103, now seen corresponding path program 2 times [2024-06-14 11:55:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:26,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348005647] [2024-06-14 11:55:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:26,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:27,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:27,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348005647] [2024-06-14 11:55:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348005647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:27,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:27,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:55:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233173944] [2024-06-14 11:55:27,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:27,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:55:27,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:55:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:55:27,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:27,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 161 transitions, 1217 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 11:55:27,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:27,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:27,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:28,279 INFO L124 PetriNetUnfolderBase]: 1828/3003 cut-off events. [2024-06-14 11:55:28,280 INFO L125 PetriNetUnfolderBase]: For 189431/189434 co-relation queries the response was YES. [2024-06-14 11:55:28,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21247 conditions, 3003 events. 1828/3003 cut-off events. For 189431/189434 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16518 event pairs, 527 based on Foata normal form. 3/3002 useless extension candidates. Maximal degree in co-relation 21181. Up to 2665 conditions per place. [2024-06-14 11:55:28,303 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 140 selfloop transitions, 16 changer transitions 0/173 dead transitions. [2024-06-14 11:55:28,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 1595 flow [2024-06-14 11:55:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:55:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:55:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:55:28,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:28,304 INFO L175 Difference]: Start difference. First operand has 139 places, 161 transitions, 1217 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:55:28,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 1595 flow [2024-06-14 11:55:28,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 173 transitions, 1545 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:28,405 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1255 flow [2024-06-14 11:55:28,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-14 11:55:28,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 11:55:28,406 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1255 flow [2024-06-14 11:55:28,406 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 11:55:28,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:28,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:28,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:55:28,407 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:28,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:28,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1691315277, now seen corresponding path program 1 times [2024-06-14 11:55:28,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:28,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763300789] [2024-06-14 11:55:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:29,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:29,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763300789] [2024-06-14 11:55:29,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763300789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:29,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:29,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540963161] [2024-06-14 11:55:29,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:29,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:29,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:29,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1255 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:29,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:29,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:29,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:30,171 INFO L124 PetriNetUnfolderBase]: 1927/3095 cut-off events. [2024-06-14 11:55:30,171 INFO L125 PetriNetUnfolderBase]: For 197083/197083 co-relation queries the response was YES. [2024-06-14 11:55:30,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21968 conditions, 3095 events. 1927/3095 cut-off events. For 197083/197083 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16581 event pairs, 508 based on Foata normal form. 4/3096 useless extension candidates. Maximal degree in co-relation 21901. Up to 2809 conditions per place. [2024-06-14 11:55:30,195 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 172 selfloop transitions, 19 changer transitions 0/197 dead transitions. [2024-06-14 11:55:30,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 1777 flow [2024-06-14 11:55:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:55:30,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:55:30,197 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1255 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:55:30,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 1777 flow [2024-06-14 11:55:30,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 1711 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:30,295 INFO L231 Difference]: Finished difference. Result has 147 places, 169 transitions, 1314 flow [2024-06-14 11:55:30,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=147, PETRI_TRANSITIONS=169} [2024-06-14 11:55:30,296 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-14 11:55:30,296 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 169 transitions, 1314 flow [2024-06-14 11:55:30,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:30,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:30,296 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 11:55:30,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:55:30,297 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:30,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash 221733423, now seen corresponding path program 1 times [2024-06-14 11:55:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247085289] [2024-06-14 11:55:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:30,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:31,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:31,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247085289] [2024-06-14 11:55:31,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247085289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:31,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:31,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989834870] [2024-06-14 11:55:31,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:31,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:31,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:31,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:31,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 169 transitions, 1314 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 11:55:31,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:31,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:32,264 INFO L124 PetriNetUnfolderBase]: 2210/3422 cut-off events. [2024-06-14 11:55:32,265 INFO L125 PetriNetUnfolderBase]: For 248230/248230 co-relation queries the response was YES. [2024-06-14 11:55:32,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25990 conditions, 3422 events. 2210/3422 cut-off events. For 248230/248230 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17723 event pairs, 413 based on Foata normal form. 4/3423 useless extension candidates. Maximal degree in co-relation 25921. Up to 3098 conditions per place. [2024-06-14 11:55:32,292 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 185 selfloop transitions, 25 changer transitions 0/215 dead transitions. [2024-06-14 11:55:32,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 215 transitions, 2106 flow [2024-06-14 11:55:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 11:55:32,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 11:55:32,293 INFO L175 Difference]: Start difference. First operand has 147 places, 169 transitions, 1314 flow. Second operand 10 states and 194 transitions. [2024-06-14 11:55:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 215 transitions, 2106 flow [2024-06-14 11:55:32,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 215 transitions, 2021 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:32,405 INFO L231 Difference]: Finished difference. Result has 151 places, 173 transitions, 1390 flow [2024-06-14 11:55:32,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1390, PETRI_PLACES=151, PETRI_TRANSITIONS=173} [2024-06-14 11:55:32,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-14 11:55:32,406 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 173 transitions, 1390 flow [2024-06-14 11:55:32,406 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 11:55:32,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:32,406 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 11:55:32,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:55:32,407 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:32,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1613724765, now seen corresponding path program 2 times [2024-06-14 11:55:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:32,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647990361] [2024-06-14 11:55:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:33,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647990361] [2024-06-14 11:55:33,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647990361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:33,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:33,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:33,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519104725] [2024-06-14 11:55:33,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:33,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:33,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:33,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:33,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 173 transitions, 1390 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 11:55:33,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:33,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:33,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:34,137 INFO L124 PetriNetUnfolderBase]: 2227/3449 cut-off events. [2024-06-14 11:55:34,138 INFO L125 PetriNetUnfolderBase]: For 260438/260438 co-relation queries the response was YES. [2024-06-14 11:55:34,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26485 conditions, 3449 events. 2227/3449 cut-off events. For 260438/260438 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17869 event pairs, 582 based on Foata normal form. 4/3450 useless extension candidates. Maximal degree in co-relation 26415. Up to 3235 conditions per place. [2024-06-14 11:55:34,163 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 185 selfloop transitions, 19 changer transitions 0/209 dead transitions. [2024-06-14 11:55:34,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 209 transitions, 1938 flow [2024-06-14 11:55:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:55:34,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 11:55:34,165 INFO L175 Difference]: Start difference. First operand has 151 places, 173 transitions, 1390 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:55:34,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 209 transitions, 1938 flow [2024-06-14 11:55:34,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 209 transitions, 1837 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:34,308 INFO L231 Difference]: Finished difference. Result has 154 places, 175 transitions, 1392 flow [2024-06-14 11:55:34,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=154, PETRI_TRANSITIONS=175} [2024-06-14 11:55:34,308 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-14 11:55:34,309 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 175 transitions, 1392 flow [2024-06-14 11:55:34,309 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 11:55:34,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:34,309 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 11:55:34,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:55:34,309 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:34,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash 998172199, now seen corresponding path program 3 times [2024-06-14 11:55:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:34,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900541474] [2024-06-14 11:55:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900541474] [2024-06-14 11:55:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900541474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:35,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214182838] [2024-06-14 11:55:35,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:35,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:35,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 175 transitions, 1392 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 11:55:35,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:35,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:35,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:36,204 INFO L124 PetriNetUnfolderBase]: 2219/3437 cut-off events. [2024-06-14 11:55:36,204 INFO L125 PetriNetUnfolderBase]: For 267335/267335 co-relation queries the response was YES. [2024-06-14 11:55:36,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26338 conditions, 3437 events. 2219/3437 cut-off events. For 267335/267335 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17808 event pairs, 575 based on Foata normal form. 4/3438 useless extension candidates. Maximal degree in co-relation 26266. Up to 3182 conditions per place. [2024-06-14 11:55:36,232 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 183 selfloop transitions, 22 changer transitions 0/210 dead transitions. [2024-06-14 11:55:36,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 210 transitions, 1890 flow [2024-06-14 11:55:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:55:36,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:55:36,234 INFO L175 Difference]: Start difference. First operand has 154 places, 175 transitions, 1392 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:55:36,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 210 transitions, 1890 flow [2024-06-14 11:55:36,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 210 transitions, 1799 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:36,409 INFO L231 Difference]: Finished difference. Result has 156 places, 175 transitions, 1352 flow [2024-06-14 11:55:36,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=156, PETRI_TRANSITIONS=175} [2024-06-14 11:55:36,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-14 11:55:36,410 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 175 transitions, 1352 flow [2024-06-14 11:55:36,410 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 11:55:36,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:36,410 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 11:55:36,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:55:36,410 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:36,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash 364070853, now seen corresponding path program 4 times [2024-06-14 11:55:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342928791] [2024-06-14 11:55:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:36,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:37,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342928791] [2024-06-14 11:55:37,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342928791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:37,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:37,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:37,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980786166] [2024-06-14 11:55:37,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:37,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:37,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 175 transitions, 1352 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 11:55:37,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:37,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:37,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:38,186 INFO L124 PetriNetUnfolderBase]: 2236/3465 cut-off events. [2024-06-14 11:55:38,186 INFO L125 PetriNetUnfolderBase]: For 278232/278235 co-relation queries the response was YES. [2024-06-14 11:55:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26665 conditions, 3465 events. 2236/3465 cut-off events. For 278232/278235 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18053 event pairs, 593 based on Foata normal form. 4/3465 useless extension candidates. Maximal degree in co-relation 26592. Up to 3124 conditions per place. [2024-06-14 11:55:38,215 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 51 changer transitions 0/208 dead transitions. [2024-06-14 11:55:38,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 208 transitions, 1890 flow [2024-06-14 11:55:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 11:55:38,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-14 11:55:38,217 INFO L175 Difference]: Start difference. First operand has 156 places, 175 transitions, 1352 flow. Second operand 9 states and 177 transitions. [2024-06-14 11:55:38,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 208 transitions, 1890 flow [2024-06-14 11:55:38,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 208 transitions, 1831 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:38,376 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1460 flow [2024-06-14 11:55:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1460, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-14 11:55:38,377 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 11:55:38,377 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1460 flow [2024-06-14 11:55:38,377 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 11:55:38,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:38,377 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 11:55:38,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:55:38,378 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:38,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:38,378 INFO L85 PathProgramCache]: Analyzing trace with hash 363922983, now seen corresponding path program 5 times [2024-06-14 11:55:38,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:38,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066191656] [2024-06-14 11:55:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:38,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:39,337 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 11:55:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066191656] [2024-06-14 11:55:39,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066191656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:39,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:39,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:39,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760351296] [2024-06-14 11:55:39,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:39,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:39,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:39,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:39,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1460 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 11:55:39,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:39,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:39,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:40,258 INFO L124 PetriNetUnfolderBase]: 2278/3531 cut-off events. [2024-06-14 11:55:40,259 INFO L125 PetriNetUnfolderBase]: For 296357/296360 co-relation queries the response was YES. [2024-06-14 11:55:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27797 conditions, 3531 events. 2278/3531 cut-off events. For 296357/296360 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18473 event pairs, 590 based on Foata normal form. 4/3531 useless extension candidates. Maximal degree in co-relation 27723. Up to 3125 conditions per place. [2024-06-14 11:55:40,290 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 154 selfloop transitions, 56 changer transitions 0/215 dead transitions. [2024-06-14 11:55:40,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 215 transitions, 2264 flow [2024-06-14 11:55:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 11:55:40,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:40,292 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1460 flow. Second operand 9 states and 180 transitions. [2024-06-14 11:55:40,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 215 transitions, 2264 flow [2024-06-14 11:55:40,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2115 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:40,461 INFO L231 Difference]: Finished difference. Result has 159 places, 181 transitions, 1550 flow [2024-06-14 11:55:40,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1550, PETRI_PLACES=159, PETRI_TRANSITIONS=181} [2024-06-14 11:55:40,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-14 11:55:40,462 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 181 transitions, 1550 flow [2024-06-14 11:55:40,462 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 11:55:40,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:40,462 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 11:55:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:55:40,462 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1072605581, now seen corresponding path program 6 times [2024-06-14 11:55:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:40,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815101204] [2024-06-14 11:55:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:41,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:41,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815101204] [2024-06-14 11:55:41,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815101204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:41,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664223709] [2024-06-14 11:55:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:41,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:41,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 181 transitions, 1550 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 11:55:41,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:41,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:41,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:42,461 INFO L124 PetriNetUnfolderBase]: 2270/3519 cut-off events. [2024-06-14 11:55:42,462 INFO L125 PetriNetUnfolderBase]: For 303809/303812 co-relation queries the response was YES. [2024-06-14 11:55:42,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27827 conditions, 3519 events. 2270/3519 cut-off events. For 303809/303812 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18364 event pairs, 593 based on Foata normal form. 4/3519 useless extension candidates. Maximal degree in co-relation 27752. Up to 3178 conditions per place. [2024-06-14 11:55:42,494 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 155 selfloop transitions, 52 changer transitions 0/212 dead transitions. [2024-06-14 11:55:42,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 212 transitions, 2042 flow [2024-06-14 11:55:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:55:42,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:55:42,501 INFO L175 Difference]: Start difference. First operand has 159 places, 181 transitions, 1550 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:55:42,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 212 transitions, 2042 flow [2024-06-14 11:55:42,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 212 transitions, 1884 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:42,704 INFO L231 Difference]: Finished difference. Result has 163 places, 181 transitions, 1503 flow [2024-06-14 11:55:42,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1503, PETRI_PLACES=163, PETRI_TRANSITIONS=181} [2024-06-14 11:55:42,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-14 11:55:42,705 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 181 transitions, 1503 flow [2024-06-14 11:55:42,710 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 11:55:42,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:42,710 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 11:55:42,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:55:42,710 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:42,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1490764337, now seen corresponding path program 1 times [2024-06-14 11:55:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478313147] [2024-06-14 11:55:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:42,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:43,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:43,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478313147] [2024-06-14 11:55:43,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478313147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:43,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:43,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230880700] [2024-06-14 11:55:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:43,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:43,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 181 transitions, 1503 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 11:55:43,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:43,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:43,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:44,263 INFO L124 PetriNetUnfolderBase]: 1938/3157 cut-off events. [2024-06-14 11:55:44,263 INFO L125 PetriNetUnfolderBase]: For 308892/308898 co-relation queries the response was YES. [2024-06-14 11:55:44,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26048 conditions, 3157 events. 1938/3157 cut-off events. For 308892/308898 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17527 event pairs, 563 based on Foata normal form. 4/3139 useless extension candidates. Maximal degree in co-relation 25971. Up to 2782 conditions per place. [2024-06-14 11:55:44,292 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 151 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2024-06-14 11:55:44,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 200 transitions, 1915 flow [2024-06-14 11:55:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:55:44,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:55:44,294 INFO L175 Difference]: Start difference. First operand has 163 places, 181 transitions, 1503 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:55:44,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 200 transitions, 1915 flow [2024-06-14 11:55:44,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 200 transitions, 1799 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:44,459 INFO L231 Difference]: Finished difference. Result has 162 places, 184 transitions, 1469 flow [2024-06-14 11:55:44,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1469, PETRI_PLACES=162, PETRI_TRANSITIONS=184} [2024-06-14 11:55:44,460 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-14 11:55:44,460 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 184 transitions, 1469 flow [2024-06-14 11:55:44,460 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 11:55:44,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:44,460 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 11:55:44,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:55:44,461 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 11:55:44,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1225623611, now seen corresponding path program 7 times [2024-06-14 11:55:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:44,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055271735] [2024-06-14 11:55:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:45,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055271735] [2024-06-14 11:55:45,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055271735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:45,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:45,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:45,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495548521] [2024-06-14 11:55:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:45,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:45,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:45,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:45,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 184 transitions, 1469 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 11:55:45,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:45,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:45,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:46,439 INFO L124 PetriNetUnfolderBase]: 2297/3558 cut-off events. [2024-06-14 11:55:46,439 INFO L125 PetriNetUnfolderBase]: For 324737/324740 co-relation queries the response was YES. [2024-06-14 11:55:46,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28630 conditions, 3558 events. 2297/3558 cut-off events. For 324737/324740 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18549 event pairs, 605 based on Foata normal form. 4/3555 useless extension candidates. Maximal degree in co-relation 28552. Up to 3219 conditions per place. [2024-06-14 11:55:46,468 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 157 selfloop transitions, 52 changer transitions 0/214 dead transitions. [2024-06-14 11:55:46,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 214 transitions, 2019 flow [2024-06-14 11:55:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 11:55:46,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 11:55:46,470 INFO L175 Difference]: Start difference. First operand has 162 places, 184 transitions, 1469 flow. Second operand 9 states and 173 transitions. [2024-06-14 11:55:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 214 transitions, 2019 flow [2024-06-14 11:55:46,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 214 transitions, 1959 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:46,689 INFO L231 Difference]: Finished difference. Result has 166 places, 186 transitions, 1586 flow [2024-06-14 11:55:46,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1586, PETRI_PLACES=166, PETRI_TRANSITIONS=186} [2024-06-14 11:55:46,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-14 11:55:46,690 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 186 transitions, 1586 flow [2024-06-14 11:55:46,690 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 11:55:46,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:46,690 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 11:55:46,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:55:46,691 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 11:55:46,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1732481727, now seen corresponding path program 8 times [2024-06-14 11:55:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:46,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150626858] [2024-06-14 11:55:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:46,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:47,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150626858] [2024-06-14 11:55:47,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150626858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:47,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:47,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:47,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626410878] [2024-06-14 11:55:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:47,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:47,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:47,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:47,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 186 transitions, 1586 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 11:55:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:48,609 INFO L124 PetriNetUnfolderBase]: 2314/3585 cut-off events. [2024-06-14 11:55:48,609 INFO L125 PetriNetUnfolderBase]: For 338719/338722 co-relation queries the response was YES. [2024-06-14 11:55:48,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29353 conditions, 3585 events. 2314/3585 cut-off events. For 338719/338722 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18739 event pairs, 600 based on Foata normal form. 4/3582 useless extension candidates. Maximal degree in co-relation 29274. Up to 3176 conditions per place. [2024-06-14 11:55:48,640 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 159 selfloop transitions, 57 changer transitions 0/221 dead transitions. [2024-06-14 11:55:48,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 221 transitions, 2424 flow [2024-06-14 11:55:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:55:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:55:48,642 INFO L175 Difference]: Start difference. First operand has 166 places, 186 transitions, 1586 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:55:48,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 221 transitions, 2424 flow [2024-06-14 11:55:48,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 221 transitions, 2265 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:48,890 INFO L231 Difference]: Finished difference. Result has 168 places, 190 transitions, 1684 flow [2024-06-14 11:55:48,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1684, PETRI_PLACES=168, PETRI_TRANSITIONS=190} [2024-06-14 11:55:48,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-14 11:55:48,891 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 190 transitions, 1684 flow [2024-06-14 11:55:48,891 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 11:55:48,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:48,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:55:48,892 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 11:55:48,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1220261231, now seen corresponding path program 9 times [2024-06-14 11:55:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:48,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811153808] [2024-06-14 11:55:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:48,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:49,833 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 11:55:49,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:49,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811153808] [2024-06-14 11:55:49,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811153808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:49,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:49,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:49,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558978011] [2024-06-14 11:55:49,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:49,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:49,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:49,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:49,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 190 transitions, 1684 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 11:55:49,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:49,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:49,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:50,735 INFO L124 PetriNetUnfolderBase]: 2331/3612 cut-off events. [2024-06-14 11:55:50,736 INFO L125 PetriNetUnfolderBase]: For 352670/352673 co-relation queries the response was YES. [2024-06-14 11:55:50,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29859 conditions, 3612 events. 2331/3612 cut-off events. For 352670/352673 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18882 event pairs, 605 based on Foata normal form. 4/3609 useless extension candidates. Maximal degree in co-relation 29779. Up to 3273 conditions per place. [2024-06-14 11:55:50,770 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 164 selfloop transitions, 51 changer transitions 0/220 dead transitions. [2024-06-14 11:55:50,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 220 transitions, 2254 flow [2024-06-14 11:55:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:55:50,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:55:50,772 INFO L175 Difference]: Start difference. First operand has 168 places, 190 transitions, 1684 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:55:50,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 220 transitions, 2254 flow [2024-06-14 11:55:51,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 220 transitions, 2082 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:51,017 INFO L231 Difference]: Finished difference. Result has 172 places, 192 transitions, 1695 flow [2024-06-14 11:55:51,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1695, PETRI_PLACES=172, PETRI_TRANSITIONS=192} [2024-06-14 11:55:51,018 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-14 11:55:51,018 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 192 transitions, 1695 flow [2024-06-14 11:55:51,018 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 11:55:51,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:51,018 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 11:55:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:55:51,019 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 11:55:51,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1931931387, now seen corresponding path program 10 times [2024-06-14 11:55:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449872070] [2024-06-14 11:55:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:51,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449872070] [2024-06-14 11:55:51,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449872070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:51,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:51,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:51,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806597818] [2024-06-14 11:55:51,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:51,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:51,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:51,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:52,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:52,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 192 transitions, 1695 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 11:55:52,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:52,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:52,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:52,900 INFO L124 PetriNetUnfolderBase]: 2323/3600 cut-off events. [2024-06-14 11:55:52,900 INFO L125 PetriNetUnfolderBase]: For 356892/356895 co-relation queries the response was YES. [2024-06-14 11:55:52,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29637 conditions, 3600 events. 2323/3600 cut-off events. For 356892/356895 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18850 event pairs, 603 based on Foata normal form. 4/3597 useless extension candidates. Maximal degree in co-relation 29555. Up to 3261 conditions per place. [2024-06-14 11:55:52,931 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 161 selfloop transitions, 54 changer transitions 0/220 dead transitions. [2024-06-14 11:55:52,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 220 transitions, 2195 flow [2024-06-14 11:55:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:55:52,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 11:55:52,933 INFO L175 Difference]: Start difference. First operand has 172 places, 192 transitions, 1695 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:55:52,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 220 transitions, 2195 flow [2024-06-14 11:55:53,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 220 transitions, 2030 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:53,206 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 1645 flow [2024-06-14 11:55:53,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1645, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2024-06-14 11:55:53,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-14 11:55:53,207 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 1645 flow [2024-06-14 11:55:53,207 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 11:55:53,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:53,207 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 11:55:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:55:53,207 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:53,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1904071217, now seen corresponding path program 2 times [2024-06-14 11:55:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:53,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234972192] [2024-06-14 11:55:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234972192] [2024-06-14 11:55:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234972192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:54,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:54,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:54,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613404298] [2024-06-14 11:55:54,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:54,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:54,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 1645 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 11:55:54,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:54,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:54,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:54,888 INFO L124 PetriNetUnfolderBase]: 1976/3215 cut-off events. [2024-06-14 11:55:54,888 INFO L125 PetriNetUnfolderBase]: For 360918/360938 co-relation queries the response was YES. [2024-06-14 11:55:54,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27581 conditions, 3215 events. 1976/3215 cut-off events. For 360918/360938 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17958 event pairs, 573 based on Foata normal form. 7/3193 useless extension candidates. Maximal degree in co-relation 27498. Up to 2829 conditions per place. [2024-06-14 11:55:54,915 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 147 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-06-14 11:55:54,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 205 transitions, 2049 flow [2024-06-14 11:55:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 11:55:54,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 11:55:54,916 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 1645 flow. Second operand 7 states and 136 transitions. [2024-06-14 11:55:54,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 205 transitions, 2049 flow [2024-06-14 11:55:55,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 205 transitions, 1922 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:55,112 INFO L231 Difference]: Finished difference. Result has 173 places, 195 transitions, 1616 flow [2024-06-14 11:55:55,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1616, PETRI_PLACES=173, PETRI_TRANSITIONS=195} [2024-06-14 11:55:55,112 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-14 11:55:55,112 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 195 transitions, 1616 flow [2024-06-14 11:55:55,112 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 11:55:55,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:55,113 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 11:55:55,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:55:55,113 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:55,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1904546447, now seen corresponding path program 3 times [2024-06-14 11:55:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433646110] [2024-06-14 11:55:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:55,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:56,238 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 11:55:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433646110] [2024-06-14 11:55:56,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433646110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:56,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:56,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809252484] [2024-06-14 11:55:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:56,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:56,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:56,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 195 transitions, 1616 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 11:55:56,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:56,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:56,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:56,861 INFO L124 PetriNetUnfolderBase]: 1973/3211 cut-off events. [2024-06-14 11:55:56,861 INFO L125 PetriNetUnfolderBase]: For 370732/370742 co-relation queries the response was YES. [2024-06-14 11:55:56,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27837 conditions, 3211 events. 1973/3211 cut-off events. For 370732/370742 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17913 event pairs, 573 based on Foata normal form. 11/3194 useless extension candidates. Maximal degree in co-relation 27753. Up to 2813 conditions per place. [2024-06-14 11:55:56,892 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 145 selfloop transitions, 29 changer transitions 0/211 dead transitions. [2024-06-14 11:55:56,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 211 transitions, 2052 flow [2024-06-14 11:55:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:55:56,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 11:55:56,894 INFO L175 Difference]: Start difference. First operand has 173 places, 195 transitions, 1616 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:55:56,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 211 transitions, 2052 flow [2024-06-14 11:55:57,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 211 transitions, 1976 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:57,162 INFO L231 Difference]: Finished difference. Result has 176 places, 201 transitions, 1690 flow [2024-06-14 11:55:57,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1690, PETRI_PLACES=176, PETRI_TRANSITIONS=201} [2024-06-14 11:55:57,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-14 11:55:57,163 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 201 transitions, 1690 flow [2024-06-14 11:55:57,163 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 11:55:57,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:57,163 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 11:55:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:55:57,163 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:57,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1668073611, now seen corresponding path program 1 times [2024-06-14 11:55:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:57,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347899831] [2024-06-14 11:55:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:57,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:57,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347899831] [2024-06-14 11:55:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347899831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:57,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092300725] [2024-06-14 11:55:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:55:57,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:55:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 201 transitions, 1690 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 11:55:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:55:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:58,538 INFO L124 PetriNetUnfolderBase]: 2191/3475 cut-off events. [2024-06-14 11:55:58,538 INFO L125 PetriNetUnfolderBase]: For 386856/386856 co-relation queries the response was YES. [2024-06-14 11:55:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29792 conditions, 3475 events. 2191/3475 cut-off events. For 386856/386856 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18715 event pairs, 539 based on Foata normal form. 1/3473 useless extension candidates. Maximal degree in co-relation 29706. Up to 3196 conditions per place. [2024-06-14 11:55:58,576 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 196 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-14 11:55:58,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 220 transitions, 2202 flow [2024-06-14 11:55:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:55:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:55:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:55:58,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 11:55:58,577 INFO L175 Difference]: Start difference. First operand has 176 places, 201 transitions, 1690 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:55:58,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 220 transitions, 2202 flow [2024-06-14 11:55:58,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 220 transitions, 2137 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:55:58,868 INFO L231 Difference]: Finished difference. Result has 180 places, 204 transitions, 1717 flow [2024-06-14 11:55:58,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1717, PETRI_PLACES=180, PETRI_TRANSITIONS=204} [2024-06-14 11:55:58,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-14 11:55:58,868 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 204 transitions, 1717 flow [2024-06-14 11:55:58,868 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 11:55:58,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:58,869 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 11:55:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:55:58,869 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 11:55:58,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1241295777, now seen corresponding path program 1 times [2024-06-14 11:55:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811896044] [2024-06-14 11:55:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:59,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:59,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811896044] [2024-06-14 11:55:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811896044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:59,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:55:59,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704003063] [2024-06-14 11:55:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:59,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:55:59,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:55:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:00,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:00,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 204 transitions, 1717 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 11:56:00,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:00,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:00,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:00,690 INFO L124 PetriNetUnfolderBase]: 2073/3361 cut-off events. [2024-06-14 11:56:00,691 INFO L125 PetriNetUnfolderBase]: For 398569/398569 co-relation queries the response was YES. [2024-06-14 11:56:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29430 conditions, 3361 events. 2073/3361 cut-off events. For 398569/398569 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18591 event pairs, 533 based on Foata normal form. 2/3360 useless extension candidates. Maximal degree in co-relation 29342. Up to 2924 conditions per place. [2024-06-14 11:56:00,723 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 174 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-14 11:56:00,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 220 transitions, 2169 flow [2024-06-14 11:56:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:56:00,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 11:56:00,724 INFO L175 Difference]: Start difference. First operand has 180 places, 204 transitions, 1717 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:56:00,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 220 transitions, 2169 flow [2024-06-14 11:56:00,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 220 transitions, 2099 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:00,972 INFO L231 Difference]: Finished difference. Result has 182 places, 207 transitions, 1731 flow [2024-06-14 11:56:00,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1731, PETRI_PLACES=182, PETRI_TRANSITIONS=207} [2024-06-14 11:56:00,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-14 11:56:00,974 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 207 transitions, 1731 flow [2024-06-14 11:56:00,975 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 11:56:00,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:00,975 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 11:56:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:56:00,975 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 11:56:00,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1668080121, now seen corresponding path program 2 times [2024-06-14 11:56:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:00,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041412303] [2024-06-14 11:56:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:00,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:01,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:01,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041412303] [2024-06-14 11:56:01,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041412303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:01,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:01,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812424595] [2024-06-14 11:56:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:01,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:01,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:01,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:01,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 207 transitions, 1731 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 11:56:01,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:01,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:01,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:02,523 INFO L124 PetriNetUnfolderBase]: 2201/3491 cut-off events. [2024-06-14 11:56:02,523 INFO L125 PetriNetUnfolderBase]: For 410591/410591 co-relation queries the response was YES. [2024-06-14 11:56:02,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30840 conditions, 3491 events. 2201/3491 cut-off events. For 410591/410591 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18770 event pairs, 538 based on Foata normal form. 1/3489 useless extension candidates. Maximal degree in co-relation 30751. Up to 3204 conditions per place. [2024-06-14 11:56:02,557 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 194 selfloop transitions, 19 changer transitions 0/223 dead transitions. [2024-06-14 11:56:02,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 223 transitions, 2249 flow [2024-06-14 11:56:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:56:02,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:56:02,558 INFO L175 Difference]: Start difference. First operand has 182 places, 207 transitions, 1731 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:56:02,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 223 transitions, 2249 flow [2024-06-14 11:56:02,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 223 transitions, 2187 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:02,838 INFO L231 Difference]: Finished difference. Result has 184 places, 210 transitions, 1779 flow [2024-06-14 11:56:02,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1779, PETRI_PLACES=184, PETRI_TRANSITIONS=210} [2024-06-14 11:56:02,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-14 11:56:02,838 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 210 transitions, 1779 flow [2024-06-14 11:56:02,839 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 11:56:02,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:02,839 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 11:56:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:56:02,839 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 11:56:02,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1904264099, now seen corresponding path program 2 times [2024-06-14 11:56:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637651150] [2024-06-14 11:56:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:03,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:03,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637651150] [2024-06-14 11:56:03,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637651150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:03,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:03,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796763278] [2024-06-14 11:56:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:03,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:03,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 210 transitions, 1779 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 11:56:03,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:03,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:03,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:04,580 INFO L124 PetriNetUnfolderBase]: 2088/3385 cut-off events. [2024-06-14 11:56:04,580 INFO L125 PetriNetUnfolderBase]: For 425077/425080 co-relation queries the response was YES. [2024-06-14 11:56:04,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30504 conditions, 3385 events. 2088/3385 cut-off events. For 425077/425080 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18769 event pairs, 535 based on Foata normal form. 5/3386 useless extension candidates. Maximal degree in co-relation 30414. Up to 2909 conditions per place. [2024-06-14 11:56:04,619 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 168 selfloop transitions, 28 changer transitions 0/229 dead transitions. [2024-06-14 11:56:04,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 229 transitions, 2431 flow [2024-06-14 11:56:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:56:04,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:56:04,621 INFO L175 Difference]: Start difference. First operand has 184 places, 210 transitions, 1779 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:56:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 229 transitions, 2431 flow [2024-06-14 11:56:04,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 229 transitions, 2343 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:04,886 INFO L231 Difference]: Finished difference. Result has 186 places, 216 transitions, 1864 flow [2024-06-14 11:56:04,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1864, PETRI_PLACES=186, PETRI_TRANSITIONS=216} [2024-06-14 11:56:04,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 11:56:04,886 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 216 transitions, 1864 flow [2024-06-14 11:56:04,887 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 11:56:04,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:04,887 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 11:56:04,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:56:04,887 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 11:56:04,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1904255729, now seen corresponding path program 3 times [2024-06-14 11:56:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:04,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913010371] [2024-06-14 11:56:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:06,001 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 11:56:06,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:06,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913010371] [2024-06-14 11:56:06,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913010371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:06,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:06,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224030363] [2024-06-14 11:56:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:06,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:06,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 216 transitions, 1864 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 11:56:06,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:06,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:06,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:06,729 INFO L124 PetriNetUnfolderBase]: 2087/3384 cut-off events. [2024-06-14 11:56:06,729 INFO L125 PetriNetUnfolderBase]: For 435475/435478 co-relation queries the response was YES. [2024-06-14 11:56:06,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30843 conditions, 3384 events. 2087/3384 cut-off events. For 435475/435478 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18806 event pairs, 536 based on Foata normal form. 5/3385 useless extension candidates. Maximal degree in co-relation 30752. Up to 2934 conditions per place. [2024-06-14 11:56:06,762 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 178 selfloop transitions, 19 changer transitions 0/230 dead transitions. [2024-06-14 11:56:06,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 230 transitions, 2344 flow [2024-06-14 11:56:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:56:06,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 11:56:06,763 INFO L175 Difference]: Start difference. First operand has 186 places, 216 transitions, 1864 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:56:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 230 transitions, 2344 flow [2024-06-14 11:56:07,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 230 transitions, 2272 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:07,019 INFO L231 Difference]: Finished difference. Result has 190 places, 219 transitions, 1900 flow [2024-06-14 11:56:07,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1900, PETRI_PLACES=190, PETRI_TRANSITIONS=219} [2024-06-14 11:56:07,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-14 11:56:07,020 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 219 transitions, 1900 flow [2024-06-14 11:56:07,020 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 11:56:07,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:07,020 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 11:56:07,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:56:07,020 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 11:56:07,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1904255481, now seen corresponding path program 3 times [2024-06-14 11:56:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:07,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979666605] [2024-06-14 11:56:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979666605] [2024-06-14 11:56:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979666605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903932301] [2024-06-14 11:56:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:07,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:08,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:08,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 219 transitions, 1900 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 11:56:08,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:08,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:08,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:08,604 INFO L124 PetriNetUnfolderBase]: 2207/3503 cut-off events. [2024-06-14 11:56:08,605 INFO L125 PetriNetUnfolderBase]: For 444023/444026 co-relation queries the response was YES. [2024-06-14 11:56:08,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31850 conditions, 3503 events. 2207/3503 cut-off events. For 444023/444026 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18966 event pairs, 545 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 31757. Up to 3205 conditions per place. [2024-06-14 11:56:08,640 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 196 selfloop transitions, 26 changer transitions 0/232 dead transitions. [2024-06-14 11:56:08,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 232 transitions, 2436 flow [2024-06-14 11:56:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:56:08,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:56:08,641 INFO L175 Difference]: Start difference. First operand has 190 places, 219 transitions, 1900 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:56:08,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 232 transitions, 2436 flow [2024-06-14 11:56:08,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 232 transitions, 2366 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:08,949 INFO L231 Difference]: Finished difference. Result has 192 places, 222 transitions, 1962 flow [2024-06-14 11:56:08,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1962, PETRI_PLACES=192, PETRI_TRANSITIONS=222} [2024-06-14 11:56:08,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-14 11:56:08,950 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 222 transitions, 1962 flow [2024-06-14 11:56:08,950 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 11:56:08,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:08,950 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 11:56:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:56:08,950 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 11:56:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1211940462, now seen corresponding path program 1 times [2024-06-14 11:56:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12729123] [2024-06-14 11:56:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:09,957 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 11:56:09,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:09,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12729123] [2024-06-14 11:56:09,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12729123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:09,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:09,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:09,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232666072] [2024-06-14 11:56:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:09,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:09,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:10,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:10,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 222 transitions, 1962 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 11:56:10,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:10,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:11,034 INFO L124 PetriNetUnfolderBase]: 2527/3948 cut-off events. [2024-06-14 11:56:11,035 INFO L125 PetriNetUnfolderBase]: For 531063/531063 co-relation queries the response was YES. [2024-06-14 11:56:11,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36304 conditions, 3948 events. 2527/3948 cut-off events. For 531063/531063 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21366 event pairs, 481 based on Foata normal form. 16/3961 useless extension candidates. Maximal degree in co-relation 36210. Up to 3303 conditions per place. [2024-06-14 11:56:11,077 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 245 selfloop transitions, 29 changer transitions 0/279 dead transitions. [2024-06-14 11:56:11,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 279 transitions, 3014 flow [2024-06-14 11:56:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:56:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:56:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-14 11:56:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-14 11:56:11,079 INFO L175 Difference]: Start difference. First operand has 192 places, 222 transitions, 1962 flow. Second operand 11 states and 219 transitions. [2024-06-14 11:56:11,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 279 transitions, 3014 flow [2024-06-14 11:56:11,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 279 transitions, 2904 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:11,351 INFO L231 Difference]: Finished difference. Result has 198 places, 224 transitions, 2018 flow [2024-06-14 11:56:11,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2018, PETRI_PLACES=198, PETRI_TRANSITIONS=224} [2024-06-14 11:56:11,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-14 11:56:11,352 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 224 transitions, 2018 flow [2024-06-14 11:56:11,352 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 11:56:11,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:11,353 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 11:56:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:56:11,353 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 11:56:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -724368452, now seen corresponding path program 2 times [2024-06-14 11:56:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272486728] [2024-06-14 11:56:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272486728] [2024-06-14 11:56:12,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272486728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802066] [2024-06-14 11:56:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:12,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:12,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 224 transitions, 2018 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 11:56:12,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:12,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:13,606 INFO L124 PetriNetUnfolderBase]: 2671/4194 cut-off events. [2024-06-14 11:56:13,607 INFO L125 PetriNetUnfolderBase]: For 579705/579705 co-relation queries the response was YES. [2024-06-14 11:56:13,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39212 conditions, 4194 events. 2671/4194 cut-off events. For 579705/579705 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 23098 event pairs, 675 based on Foata normal form. 16/4207 useless extension candidates. Maximal degree in co-relation 39117. Up to 3680 conditions per place. [2024-06-14 11:56:13,648 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 247 selfloop transitions, 23 changer transitions 0/275 dead transitions. [2024-06-14 11:56:13,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 275 transitions, 3056 flow [2024-06-14 11:56:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:56:13,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 11:56:13,650 INFO L175 Difference]: Start difference. First operand has 198 places, 224 transitions, 2018 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:56:13,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 275 transitions, 3056 flow [2024-06-14 11:56:14,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 275 transitions, 2964 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:14,055 INFO L231 Difference]: Finished difference. Result has 201 places, 226 transitions, 2084 flow [2024-06-14 11:56:14,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2084, PETRI_PLACES=201, PETRI_TRANSITIONS=226} [2024-06-14 11:56:14,055 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-14 11:56:14,056 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 226 transitions, 2084 flow [2024-06-14 11:56:14,056 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 11:56:14,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:14,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:14,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:56:14,056 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 11:56:14,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1093675152, now seen corresponding path program 3 times [2024-06-14 11:56:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:14,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717595377] [2024-06-14 11:56:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717595377] [2024-06-14 11:56:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717595377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:15,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:15,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:15,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566104320] [2024-06-14 11:56:15,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:15,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:15,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:15,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:15,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 226 transitions, 2084 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 11:56:15,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:15,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:15,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:16,342 INFO L124 PetriNetUnfolderBase]: 2635/4138 cut-off events. [2024-06-14 11:56:16,343 INFO L125 PetriNetUnfolderBase]: For 565343/565343 co-relation queries the response was YES. [2024-06-14 11:56:16,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37444 conditions, 4138 events. 2635/4138 cut-off events. For 565343/565343 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22727 event pairs, 677 based on Foata normal form. 20/4155 useless extension candidates. Maximal degree in co-relation 37347. Up to 3780 conditions per place. [2024-06-14 11:56:16,386 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 243 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2024-06-14 11:56:16,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 269 transitions, 2754 flow [2024-06-14 11:56:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 11:56:16,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-14 11:56:16,388 INFO L175 Difference]: Start difference. First operand has 201 places, 226 transitions, 2084 flow. Second operand 10 states and 193 transitions. [2024-06-14 11:56:16,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 269 transitions, 2754 flow [2024-06-14 11:56:16,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 269 transitions, 2678 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:16,940 INFO L231 Difference]: Finished difference. Result has 205 places, 226 transitions, 2057 flow [2024-06-14 11:56:16,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2057, PETRI_PLACES=205, PETRI_TRANSITIONS=226} [2024-06-14 11:56:16,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-14 11:56:16,941 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 226 transitions, 2057 flow [2024-06-14 11:56:16,941 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 11:56:16,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:16,941 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 11:56:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:56:16,942 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 11:56:16,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 878568764, now seen corresponding path program 4 times [2024-06-14 11:56:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033817277] [2024-06-14 11:56:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:17,976 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 11:56:17,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:17,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033817277] [2024-06-14 11:56:17,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033817277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:17,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:17,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525883947] [2024-06-14 11:56:17,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:17,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:17,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:18,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:18,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 226 transitions, 2057 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 11:56:18,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:18,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:18,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:19,099 INFO L124 PetriNetUnfolderBase]: 2607/4094 cut-off events. [2024-06-14 11:56:19,099 INFO L125 PetriNetUnfolderBase]: For 539442/539442 co-relation queries the response was YES. [2024-06-14 11:56:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36094 conditions, 4094 events. 2607/4094 cut-off events. For 539442/539442 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 22462 event pairs, 632 based on Foata normal form. 16/4107 useless extension candidates. Maximal degree in co-relation 35995. Up to 3493 conditions per place. [2024-06-14 11:56:19,141 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 243 selfloop transitions, 26 changer transitions 0/274 dead transitions. [2024-06-14 11:56:19,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 274 transitions, 2757 flow [2024-06-14 11:56:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:56:19,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 11:56:19,143 INFO L175 Difference]: Start difference. First operand has 205 places, 226 transitions, 2057 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:56:19,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 274 transitions, 2757 flow [2024-06-14 11:56:19,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 274 transitions, 2694 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:56:19,476 INFO L231 Difference]: Finished difference. Result has 206 places, 226 transitions, 2052 flow [2024-06-14 11:56:19,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2052, PETRI_PLACES=206, PETRI_TRANSITIONS=226} [2024-06-14 11:56:19,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 11:56:19,476 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 226 transitions, 2052 flow [2024-06-14 11:56:19,477 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 11:56:19,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:19,477 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 11:56:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:56:19,477 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 11:56:19,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1094269798, now seen corresponding path program 5 times [2024-06-14 11:56:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:19,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85317071] [2024-06-14 11:56:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:19,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:20,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85317071] [2024-06-14 11:56:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85317071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:20,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526248609] [2024-06-14 11:56:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:20,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:20,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:20,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 226 transitions, 2052 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 11:56:20,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:20,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:20,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:21,951 INFO L124 PetriNetUnfolderBase]: 2682/4228 cut-off events. [2024-06-14 11:56:21,951 INFO L125 PetriNetUnfolderBase]: For 565001/565004 co-relation queries the response was YES. [2024-06-14 11:56:21,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37183 conditions, 4228 events. 2682/4228 cut-off events. For 565001/565004 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23538 event pairs, 630 based on Foata normal form. 20/4244 useless extension candidates. Maximal degree in co-relation 37083. Up to 3458 conditions per place. [2024-06-14 11:56:22,015 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 180 selfloop transitions, 85 changer transitions 0/270 dead transitions. [2024-06-14 11:56:22,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 270 transitions, 2780 flow [2024-06-14 11:56:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 11:56:22,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 11:56:22,017 INFO L175 Difference]: Start difference. First operand has 206 places, 226 transitions, 2052 flow. Second operand 10 states and 206 transitions. [2024-06-14 11:56:22,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 270 transitions, 2780 flow [2024-06-14 11:56:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 270 transitions, 2685 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 11:56:22,487 INFO L231 Difference]: Finished difference. Result has 206 places, 227 transitions, 2188 flow [2024-06-14 11:56:22,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2188, PETRI_PLACES=206, PETRI_TRANSITIONS=227} [2024-06-14 11:56:22,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 11:56:22,488 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 227 transitions, 2188 flow [2024-06-14 11:56:22,488 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 11:56:22,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:22,488 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 11:56:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:56:22,489 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 11:56:22,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1598703778, now seen corresponding path program 6 times [2024-06-14 11:56:22,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:22,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357181368] [2024-06-14 11:56:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:23,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:23,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357181368] [2024-06-14 11:56:23,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357181368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:23,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:23,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:23,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834510545] [2024-06-14 11:56:23,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:23,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:23,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:23,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:23,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 227 transitions, 2188 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 11:56:23,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:23,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:23,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:24,813 INFO L124 PetriNetUnfolderBase]: 2740/4336 cut-off events. [2024-06-14 11:56:24,813 INFO L125 PetriNetUnfolderBase]: For 577869/577872 co-relation queries the response was YES. [2024-06-14 11:56:24,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38157 conditions, 4336 events. 2740/4336 cut-off events. For 577869/577872 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24449 event pairs, 630 based on Foata normal form. 16/4348 useless extension candidates. Maximal degree in co-relation 38057. Up to 3446 conditions per place. [2024-06-14 11:56:24,859 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 183 selfloop transitions, 87 changer transitions 0/275 dead transitions. [2024-06-14 11:56:24,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 275 transitions, 2946 flow [2024-06-14 11:56:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 11:56:24,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:56:24,864 INFO L175 Difference]: Start difference. First operand has 206 places, 227 transitions, 2188 flow. Second operand 10 states and 210 transitions. [2024-06-14 11:56:24,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 275 transitions, 2946 flow [2024-06-14 11:56:25,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 275 transitions, 2747 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:25,366 INFO L231 Difference]: Finished difference. Result has 208 places, 228 transitions, 2225 flow [2024-06-14 11:56:25,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2225, PETRI_PLACES=208, PETRI_TRANSITIONS=228} [2024-06-14 11:56:25,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-14 11:56:25,367 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 228 transitions, 2225 flow [2024-06-14 11:56:25,367 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 11:56:25,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:25,367 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 11:56:25,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:56:25,368 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 11:56:25,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:25,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1279781440, now seen corresponding path program 7 times [2024-06-14 11:56:25,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:25,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345670154] [2024-06-14 11:56:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345670154] [2024-06-14 11:56:26,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345670154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:26,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:26,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:26,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386231818] [2024-06-14 11:56:26,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:26,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:26,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:26,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:26,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:26,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 228 transitions, 2225 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 11:56:26,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:26,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:26,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:27,684 INFO L124 PetriNetUnfolderBase]: 2909/4620 cut-off events. [2024-06-14 11:56:27,684 INFO L125 PetriNetUnfolderBase]: For 642720/642723 co-relation queries the response was YES. [2024-06-14 11:56:27,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41531 conditions, 4620 events. 2909/4620 cut-off events. For 642720/642723 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26636 event pairs, 668 based on Foata normal form. 16/4632 useless extension candidates. Maximal degree in co-relation 41430. Up to 3383 conditions per place. [2024-06-14 11:56:27,728 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 182 selfloop transitions, 92 changer transitions 0/279 dead transitions. [2024-06-14 11:56:27,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 279 transitions, 3301 flow [2024-06-14 11:56:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 11:56:27,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-14 11:56:27,729 INFO L175 Difference]: Start difference. First operand has 208 places, 228 transitions, 2225 flow. Second operand 10 states and 211 transitions. [2024-06-14 11:56:27,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 279 transitions, 3301 flow [2024-06-14 11:56:28,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 3085 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:28,223 INFO L231 Difference]: Finished difference. Result has 210 places, 230 transitions, 2313 flow [2024-06-14 11:56:28,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2313, PETRI_PLACES=210, PETRI_TRANSITIONS=230} [2024-06-14 11:56:28,225 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 11:56:28,225 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 230 transitions, 2313 flow [2024-06-14 11:56:28,225 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 11:56:28,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:28,225 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 11:56:28,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:56:28,226 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:28,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1108786060, now seen corresponding path program 8 times [2024-06-14 11:56:28,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:28,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461948526] [2024-06-14 11:56:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:29,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461948526] [2024-06-14 11:56:29,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461948526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:29,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:29,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332484990] [2024-06-14 11:56:29,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:29,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:29,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:29,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 230 transitions, 2313 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 11:56:29,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:29,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:29,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:30,645 INFO L124 PetriNetUnfolderBase]: 2984/4745 cut-off events. [2024-06-14 11:56:30,646 INFO L125 PetriNetUnfolderBase]: For 672769/672772 co-relation queries the response was YES. [2024-06-14 11:56:30,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42547 conditions, 4745 events. 2984/4745 cut-off events. For 672769/672772 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27574 event pairs, 703 based on Foata normal form. 20/4761 useless extension candidates. Maximal degree in co-relation 42445. Up to 3960 conditions per place. [2024-06-14 11:56:30,694 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 183 selfloop transitions, 86 changer transitions 0/274 dead transitions. [2024-06-14 11:56:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 274 transitions, 3055 flow [2024-06-14 11:56:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 11:56:30,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 11:56:30,696 INFO L175 Difference]: Start difference. First operand has 210 places, 230 transitions, 2313 flow. Second operand 10 states and 205 transitions. [2024-06-14 11:56:30,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 274 transitions, 3055 flow [2024-06-14 11:56:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 274 transitions, 2889 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:31,244 INFO L231 Difference]: Finished difference. Result has 214 places, 231 transitions, 2386 flow [2024-06-14 11:56:31,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2386, PETRI_PLACES=214, PETRI_TRANSITIONS=231} [2024-06-14 11:56:31,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-14 11:56:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 231 transitions, 2386 flow [2024-06-14 11:56:31,245 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 11:56:31,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:31,245 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 11:56:31,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:56:31,245 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:31,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1102529950, now seen corresponding path program 9 times [2024-06-14 11:56:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763061130] [2024-06-14 11:56:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:31,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:32,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763061130] [2024-06-14 11:56:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763061130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:32,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:32,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228535995] [2024-06-14 11:56:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:32,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:32,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:32,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 231 transitions, 2386 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 11:56:32,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:32,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:32,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:33,803 INFO L124 PetriNetUnfolderBase]: 3034/4841 cut-off events. [2024-06-14 11:56:33,803 INFO L125 PetriNetUnfolderBase]: For 674866/674869 co-relation queries the response was YES. [2024-06-14 11:56:33,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42788 conditions, 4841 events. 3034/4841 cut-off events. For 674866/674869 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 28350 event pairs, 725 based on Foata normal form. 20/4857 useless extension candidates. Maximal degree in co-relation 42684. Up to 4046 conditions per place. [2024-06-14 11:56:33,857 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 88 changer transitions 0/274 dead transitions. [2024-06-14 11:56:33,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 274 transitions, 3114 flow [2024-06-14 11:56:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:56:33,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 11:56:33,858 INFO L175 Difference]: Start difference. First operand has 214 places, 231 transitions, 2386 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:56:33,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 274 transitions, 3114 flow [2024-06-14 11:56:34,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 274 transitions, 2921 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:34,364 INFO L231 Difference]: Finished difference. Result has 216 places, 232 transitions, 2426 flow [2024-06-14 11:56:34,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2426, PETRI_PLACES=216, PETRI_TRANSITIONS=232} [2024-06-14 11:56:34,364 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-14 11:56:34,364 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 232 transitions, 2426 flow [2024-06-14 11:56:34,365 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 11:56:34,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:34,365 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 11:56:34,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:56:34,365 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:34,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1432469998, now seen corresponding path program 10 times [2024-06-14 11:56:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:34,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052059528] [2024-06-14 11:56:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:34,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052059528] [2024-06-14 11:56:35,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052059528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:35,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:35,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194164666] [2024-06-14 11:56:35,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:35,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:35,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:35,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 232 transitions, 2426 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 11:56:35,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:35,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:35,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:36,618 INFO L124 PetriNetUnfolderBase]: 3006/4797 cut-off events. [2024-06-14 11:56:36,618 INFO L125 PetriNetUnfolderBase]: For 646256/646259 co-relation queries the response was YES. [2024-06-14 11:56:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41508 conditions, 4797 events. 3006/4797 cut-off events. For 646256/646259 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 28016 event pairs, 685 based on Foata normal form. 16/4809 useless extension candidates. Maximal degree in co-relation 41403. Up to 3772 conditions per place. [2024-06-14 11:56:36,670 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 89 changer transitions 0/278 dead transitions. [2024-06-14 11:56:36,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 278 transitions, 3132 flow [2024-06-14 11:56:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 11:56:36,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-14 11:56:36,672 INFO L175 Difference]: Start difference. First operand has 216 places, 232 transitions, 2426 flow. Second operand 10 states and 207 transitions. [2024-06-14 11:56:36,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 278 transitions, 3132 flow [2024-06-14 11:56:37,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 2919 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:37,346 INFO L231 Difference]: Finished difference. Result has 218 places, 232 transitions, 2397 flow [2024-06-14 11:56:37,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2397, PETRI_PLACES=218, PETRI_TRANSITIONS=232} [2024-06-14 11:56:37,346 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-14 11:56:37,346 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 232 transitions, 2397 flow [2024-06-14 11:56:37,347 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 11:56:37,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:37,347 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 11:56:37,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:56:37,347 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 11:56:37,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash -898464728, now seen corresponding path program 1 times [2024-06-14 11:56:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:37,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055396114] [2024-06-14 11:56:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:37,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:38,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055396114] [2024-06-14 11:56:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055396114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:38,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:38,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846968422] [2024-06-14 11:56:38,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:38,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:38,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:38,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 232 transitions, 2397 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 11:56:38,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:38,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:38,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:39,051 INFO L124 PetriNetUnfolderBase]: 2828/4591 cut-off events. [2024-06-14 11:56:39,051 INFO L125 PetriNetUnfolderBase]: For 621153/621156 co-relation queries the response was YES. [2024-06-14 11:56:39,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40190 conditions, 4591 events. 2828/4591 cut-off events. For 621153/621156 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27559 event pairs, 757 based on Foata normal form. 3/4554 useless extension candidates. Maximal degree in co-relation 40084. Up to 4192 conditions per place. [2024-06-14 11:56:39,103 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 206 selfloop transitions, 19 changer transitions 0/254 dead transitions. [2024-06-14 11:56:39,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 254 transitions, 2945 flow [2024-06-14 11:56:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:56:39,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:56:39,104 INFO L175 Difference]: Start difference. First operand has 218 places, 232 transitions, 2397 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:56:39,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 254 transitions, 2945 flow [2024-06-14 11:56:39,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 254 transitions, 2727 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:56:39,676 INFO L231 Difference]: Finished difference. Result has 216 places, 235 transitions, 2279 flow [2024-06-14 11:56:39,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2279, PETRI_PLACES=216, PETRI_TRANSITIONS=235} [2024-06-14 11:56:39,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-14 11:56:39,677 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 235 transitions, 2279 flow [2024-06-14 11:56:39,678 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 11:56:39,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:39,678 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 11:56:39,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:56:39,678 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 11:56:39,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1030954144, now seen corresponding path program 2 times [2024-06-14 11:56:39,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:39,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971818539] [2024-06-14 11:56:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:39,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:40,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:40,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971818539] [2024-06-14 11:56:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971818539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:56:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350963732] [2024-06-14 11:56:40,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:56:40,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:56:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:56:40,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:56:40,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 235 transitions, 2279 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 11:56:40,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:40,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:56:40,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:41,505 INFO L124 PetriNetUnfolderBase]: 2841/4619 cut-off events. [2024-06-14 11:56:41,505 INFO L125 PetriNetUnfolderBase]: For 635342/635345 co-relation queries the response was YES. [2024-06-14 11:56:41,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40326 conditions, 4619 events. 2841/4619 cut-off events. For 635342/635345 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27787 event pairs, 757 based on Foata normal form. 3/4582 useless extension candidates. Maximal degree in co-relation 40219. Up to 4200 conditions per place. [2024-06-14 11:56:41,559 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 26 changer transitions 0/260 dead transitions. [2024-06-14 11:56:41,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 260 transitions, 3058 flow [2024-06-14 11:56:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:56:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:56:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:56:41,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:56:41,560 INFO L175 Difference]: Start difference. First operand has 216 places, 235 transitions, 2279 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:56:41,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 260 transitions, 3058 flow [2024-06-14 11:56:42,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 260 transitions, 2980 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:42,135 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2405 flow [2024-06-14 11:56:42,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2405, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-14 11:56:42,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-14 11:56:42,136 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2405 flow [2024-06-14 11:56:42,136 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 11:56:42,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:42,136 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 11:56:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:56:42,136 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1102283686, now seen corresponding path program 1 times [2024-06-14 11:56:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129125654] [2024-06-14 11:56:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:43,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:43,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129125654] [2024-06-14 11:56:43,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129125654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:43,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:43,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:43,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672409139] [2024-06-14 11:56:43,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:43,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:43,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:43,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:43,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:43,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2405 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 11:56:43,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:43,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:43,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:44,354 INFO L124 PetriNetUnfolderBase]: 3041/4871 cut-off events. [2024-06-14 11:56:44,354 INFO L125 PetriNetUnfolderBase]: For 666075/666078 co-relation queries the response was YES. [2024-06-14 11:56:44,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42379 conditions, 4871 events. 3041/4871 cut-off events. For 666075/666078 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28714 event pairs, 739 based on Foata normal form. 4/4871 useless extension candidates. Maximal degree in co-relation 42270. Up to 4452 conditions per place. [2024-06-14 11:56:44,407 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 45 changer transitions 0/284 dead transitions. [2024-06-14 11:56:44,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 284 transitions, 3143 flow [2024-06-14 11:56:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 11:56:44,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 11:56:44,410 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2405 flow. Second operand 10 states and 194 transitions. [2024-06-14 11:56:44,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 284 transitions, 3143 flow [2024-06-14 11:56:45,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 284 transitions, 3061 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 11:56:45,068 INFO L231 Difference]: Finished difference. Result has 227 places, 248 transitions, 2518 flow [2024-06-14 11:56:45,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2518, PETRI_PLACES=227, PETRI_TRANSITIONS=248} [2024-06-14 11:56:45,069 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 11:56:45,069 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 248 transitions, 2518 flow [2024-06-14 11:56:45,069 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 11:56:45,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:45,069 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 11:56:45,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:56:45,069 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 11:56:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1030944224, now seen corresponding path program 1 times [2024-06-14 11:56:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:45,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586165731] [2024-06-14 11:56:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:46,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:46,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586165731] [2024-06-14 11:56:46,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586165731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:46,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:46,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:46,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382290899] [2024-06-14 11:56:46,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:46,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:46,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:46,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:46,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:56:46,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 248 transitions, 2518 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 11:56:46,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:46,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:56:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:47,163 INFO L124 PetriNetUnfolderBase]: 2708/4471 cut-off events. [2024-06-14 11:56:47,163 INFO L125 PetriNetUnfolderBase]: For 675284/675300 co-relation queries the response was YES. [2024-06-14 11:56:47,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40983 conditions, 4471 events. 2708/4471 cut-off events. For 675284/675300 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27287 event pairs, 696 based on Foata normal form. 6/4416 useless extension candidates. Maximal degree in co-relation 40871. Up to 3918 conditions per place. [2024-06-14 11:56:47,215 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 202 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-14 11:56:47,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 268 transitions, 3058 flow [2024-06-14 11:56:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:56:47,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:56:47,216 INFO L175 Difference]: Start difference. First operand has 227 places, 248 transitions, 2518 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:56:47,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 268 transitions, 3058 flow [2024-06-14 11:56:47,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 268 transitions, 2905 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:47,890 INFO L231 Difference]: Finished difference. Result has 228 places, 251 transitions, 2471 flow [2024-06-14 11:56:47,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2471, PETRI_PLACES=228, PETRI_TRANSITIONS=251} [2024-06-14 11:56:47,890 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-14 11:56:47,890 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 251 transitions, 2471 flow [2024-06-14 11:56:47,891 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 11:56:47,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:47,891 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 11:56:47,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:56:47,891 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:47,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash 833042910, now seen corresponding path program 11 times [2024-06-14 11:56:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674817333] [2024-06-14 11:56:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:48,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:48,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674817333] [2024-06-14 11:56:48,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674817333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:48,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:48,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:48,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458767797] [2024-06-14 11:56:48,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:48,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:49,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:49,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 251 transitions, 2471 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 11:56:49,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:49,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:49,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:50,454 INFO L124 PetriNetUnfolderBase]: 3126/4991 cut-off events. [2024-06-14 11:56:50,455 INFO L125 PetriNetUnfolderBase]: For 741327/741330 co-relation queries the response was YES. [2024-06-14 11:56:50,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44594 conditions, 4991 events. 3126/4991 cut-off events. For 741327/741330 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 29372 event pairs, 702 based on Foata normal form. 20/5004 useless extension candidates. Maximal degree in co-relation 44481. Up to 4193 conditions per place. [2024-06-14 11:56:50,505 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 200 selfloop transitions, 87 changer transitions 0/292 dead transitions. [2024-06-14 11:56:50,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 292 transitions, 3255 flow [2024-06-14 11:56:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 11:56:50,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 11:56:50,506 INFO L175 Difference]: Start difference. First operand has 228 places, 251 transitions, 2471 flow. Second operand 10 states and 201 transitions. [2024-06-14 11:56:50,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 292 transitions, 3255 flow [2024-06-14 11:56:51,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 292 transitions, 3171 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:51,064 INFO L231 Difference]: Finished difference. Result has 232 places, 252 transitions, 2630 flow [2024-06-14 11:56:51,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2630, PETRI_PLACES=232, PETRI_TRANSITIONS=252} [2024-06-14 11:56:51,064 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 11:56:51,064 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 252 transitions, 2630 flow [2024-06-14 11:56:51,064 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 11:56:51,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:51,065 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 11:56:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:56:51,065 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 11:56:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 645863778, now seen corresponding path program 12 times [2024-06-14 11:56:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551908587] [2024-06-14 11:56:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:52,079 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 11:56:52,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:52,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551908587] [2024-06-14 11:56:52,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551908587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:52,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:52,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:52,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215821681] [2024-06-14 11:56:52,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:52,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:52,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:52,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 252 transitions, 2630 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 11:56:52,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:52,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:52,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:53,483 INFO L124 PetriNetUnfolderBase]: 3201/5126 cut-off events. [2024-06-14 11:56:53,484 INFO L125 PetriNetUnfolderBase]: For 770677/770680 co-relation queries the response was YES. [2024-06-14 11:56:53,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46229 conditions, 5126 events. 3201/5126 cut-off events. For 770677/770680 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30396 event pairs, 726 based on Foata normal form. 20/5139 useless extension candidates. Maximal degree in co-relation 46115. Up to 4318 conditions per place. [2024-06-14 11:56:53,541 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 203 selfloop transitions, 86 changer transitions 0/294 dead transitions. [2024-06-14 11:56:53,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 294 transitions, 3426 flow [2024-06-14 11:56:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:56:53,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 11:56:53,542 INFO L175 Difference]: Start difference. First operand has 232 places, 252 transitions, 2630 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:56:53,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 294 transitions, 3426 flow [2024-06-14 11:56:54,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 294 transitions, 3215 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:54,230 INFO L231 Difference]: Finished difference. Result has 234 places, 253 transitions, 2662 flow [2024-06-14 11:56:54,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2662, PETRI_PLACES=234, PETRI_TRANSITIONS=253} [2024-06-14 11:56:54,230 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 11:56:54,230 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2662 flow [2024-06-14 11:56:54,230 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 11:56:54,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:54,231 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 11:56:54,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:56:54,231 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 11:56:54,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:54,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1956821894, now seen corresponding path program 13 times [2024-06-14 11:56:54,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:54,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829168208] [2024-06-14 11:56:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:54,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:55,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829168208] [2024-06-14 11:56:55,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829168208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:55,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:55,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705064136] [2024-06-14 11:56:55,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:55,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:55,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:55,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:55,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 253 transitions, 2662 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 11:56:55,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:55,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:55,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:56,754 INFO L124 PetriNetUnfolderBase]: 3259/5234 cut-off events. [2024-06-14 11:56:56,755 INFO L125 PetriNetUnfolderBase]: For 779960/779963 co-relation queries the response was YES. [2024-06-14 11:56:56,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46897 conditions, 5234 events. 3259/5234 cut-off events. For 779960/779963 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31286 event pairs, 726 based on Foata normal form. 16/5243 useless extension candidates. Maximal degree in co-relation 46782. Up to 4186 conditions per place. [2024-06-14 11:56:56,826 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 204 selfloop transitions, 89 changer transitions 0/298 dead transitions. [2024-06-14 11:56:56,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 298 transitions, 3482 flow [2024-06-14 11:56:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 11:56:56,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 11:56:56,828 INFO L175 Difference]: Start difference. First operand has 234 places, 253 transitions, 2662 flow. Second operand 10 states and 205 transitions. [2024-06-14 11:56:56,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 298 transitions, 3482 flow [2024-06-14 11:56:57,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 298 transitions, 3271 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:57,534 INFO L231 Difference]: Finished difference. Result has 236 places, 254 transitions, 2701 flow [2024-06-14 11:56:57,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2701, PETRI_PLACES=236, PETRI_TRANSITIONS=254} [2024-06-14 11:56:57,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-14 11:56:57,534 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 254 transitions, 2701 flow [2024-06-14 11:56:57,534 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 11:56:57,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:57,535 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 11:56:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:56:57,535 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 11:56:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2127524324, now seen corresponding path program 14 times [2024-06-14 11:56:57,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:57,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497265333] [2024-06-14 11:56:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:58,615 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 11:56:58,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497265333] [2024-06-14 11:56:58,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497265333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:58,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:58,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:56:58,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708693583] [2024-06-14 11:56:58,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:58,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:56:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:58,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:56:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:56:58,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:58,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 254 transitions, 2701 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 11:56:58,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:58,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:58,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:00,191 INFO L124 PetriNetUnfolderBase]: 3428/5523 cut-off events. [2024-06-14 11:57:00,192 INFO L125 PetriNetUnfolderBase]: For 863673/863676 co-relation queries the response was YES. [2024-06-14 11:57:00,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50655 conditions, 5523 events. 3428/5523 cut-off events. For 863673/863676 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33611 event pairs, 769 based on Foata normal form. 16/5532 useless extension candidates. Maximal degree in co-relation 50539. Up to 4539 conditions per place. [2024-06-14 11:57:00,259 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 206 selfloop transitions, 91 changer transitions 0/302 dead transitions. [2024-06-14 11:57:00,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 302 transitions, 3889 flow [2024-06-14 11:57:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 11:57:00,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 11:57:00,261 INFO L175 Difference]: Start difference. First operand has 236 places, 254 transitions, 2701 flow. Second operand 10 states and 206 transitions. [2024-06-14 11:57:00,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 302 transitions, 3889 flow [2024-06-14 11:57:01,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 302 transitions, 3659 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:01,121 INFO L231 Difference]: Finished difference. Result has 238 places, 256 transitions, 2793 flow [2024-06-14 11:57:01,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2793, PETRI_PLACES=238, PETRI_TRANSITIONS=256} [2024-06-14 11:57:01,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-14 11:57:01,122 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 256 transitions, 2793 flow [2024-06-14 11:57:01,122 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 11:57:01,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:01,122 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 11:57:01,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:57:01,122 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 11:57:01,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1333108326, now seen corresponding path program 15 times [2024-06-14 11:57:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:01,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759446417] [2024-06-14 11:57:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:02,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:02,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759446417] [2024-06-14 11:57:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759446417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:02,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270266138] [2024-06-14 11:57:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:02,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:02,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:02,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 256 transitions, 2793 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 11:57:02,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:02,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:02,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:03,540 INFO L124 PetriNetUnfolderBase]: 3392/5467 cut-off events. [2024-06-14 11:57:03,540 INFO L125 PetriNetUnfolderBase]: For 833750/833753 co-relation queries the response was YES. [2024-06-14 11:57:03,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48566 conditions, 5467 events. 3392/5467 cut-off events. For 833750/833753 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33233 event pairs, 771 based on Foata normal form. 20/5480 useless extension candidates. Maximal degree in co-relation 48449. Up to 4639 conditions per place. [2024-06-14 11:57:03,606 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 202 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2024-06-14 11:57:03,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3525 flow [2024-06-14 11:57:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 11:57:03,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:57:03,607 INFO L175 Difference]: Start difference. First operand has 238 places, 256 transitions, 2793 flow. Second operand 10 states and 200 transitions. [2024-06-14 11:57:03,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3525 flow [2024-06-14 11:57:04,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 296 transitions, 3325 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:04,564 INFO L231 Difference]: Finished difference. Result has 242 places, 256 transitions, 2778 flow [2024-06-14 11:57:04,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2778, PETRI_PLACES=242, PETRI_TRANSITIONS=256} [2024-06-14 11:57:04,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 11:57:04,565 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 256 transitions, 2778 flow [2024-06-14 11:57:04,565 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 11:57:04,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:04,565 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 11:57:04,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:57:04,566 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 11:57:04,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 655791420, now seen corresponding path program 16 times [2024-06-14 11:57:04,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:04,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519650403] [2024-06-14 11:57:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:05,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:05,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519650403] [2024-06-14 11:57:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519650403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:05,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296586777] [2024-06-14 11:57:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:05,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:05,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 256 transitions, 2778 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 11:57:05,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:05,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:05,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:07,035 INFO L124 PetriNetUnfolderBase]: 3511/5668 cut-off events. [2024-06-14 11:57:07,035 INFO L125 PetriNetUnfolderBase]: For 874079/874082 co-relation queries the response was YES. [2024-06-14 11:57:07,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50976 conditions, 5668 events. 3511/5668 cut-off events. For 874079/874082 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34724 event pairs, 776 based on Foata normal form. 16/5677 useless extension candidates. Maximal degree in co-relation 50857. Up to 4023 conditions per place. [2024-06-14 11:57:07,104 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 199 selfloop transitions, 100 changer transitions 0/304 dead transitions. [2024-06-14 11:57:07,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 304 transitions, 3978 flow [2024-06-14 11:57:07,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 11:57:07,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 11:57:07,109 INFO L175 Difference]: Start difference. First operand has 242 places, 256 transitions, 2778 flow. Second operand 10 states and 205 transitions. [2024-06-14 11:57:07,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 304 transitions, 3978 flow [2024-06-14 11:57:07,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 304 transitions, 3793 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:57:07,877 INFO L231 Difference]: Finished difference. Result has 243 places, 258 transitions, 2937 flow [2024-06-14 11:57:07,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2937, PETRI_PLACES=243, PETRI_TRANSITIONS=258} [2024-06-14 11:57:07,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-14 11:57:07,878 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 258 transitions, 2937 flow [2024-06-14 11:57:07,878 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 11:57:07,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:07,878 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 11:57:07,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:57:07,879 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 11:57:07,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 796459854, now seen corresponding path program 17 times [2024-06-14 11:57:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:07,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872864609] [2024-06-14 11:57:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:07,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872864609] [2024-06-14 11:57:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872864609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:08,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:08,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:08,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988917378] [2024-06-14 11:57:08,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:08,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:08,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:08,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:09,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:09,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 258 transitions, 2937 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 11:57:09,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:09,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:09,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:10,672 INFO L124 PetriNetUnfolderBase]: 3586/5803 cut-off events. [2024-06-14 11:57:10,672 INFO L125 PetriNetUnfolderBase]: For 919066/919069 co-relation queries the response was YES. [2024-06-14 11:57:10,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52505 conditions, 5803 events. 3586/5803 cut-off events. For 919066/919069 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 35929 event pairs, 830 based on Foata normal form. 20/5816 useless extension candidates. Maximal degree in co-relation 52385. Up to 4965 conditions per place. [2024-06-14 11:57:10,738 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 204 selfloop transitions, 90 changer transitions 0/299 dead transitions. [2024-06-14 11:57:10,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 299 transitions, 3745 flow [2024-06-14 11:57:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:57:10,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 11:57:10,740 INFO L175 Difference]: Start difference. First operand has 243 places, 258 transitions, 2937 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:57:10,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 299 transitions, 3745 flow [2024-06-14 11:57:11,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 299 transitions, 3554 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:11,614 INFO L231 Difference]: Finished difference. Result has 247 places, 259 transitions, 3005 flow [2024-06-14 11:57:11,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3005, PETRI_PLACES=247, PETRI_TRANSITIONS=259} [2024-06-14 11:57:11,614 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-14 11:57:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 259 transitions, 3005 flow [2024-06-14 11:57:11,614 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 11:57:11,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:11,615 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 11:57:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:57:11,615 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 11:57:11,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 796282224, now seen corresponding path program 18 times [2024-06-14 11:57:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:11,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268382882] [2024-06-14 11:57:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:12,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:12,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268382882] [2024-06-14 11:57:12,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268382882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:12,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:12,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:12,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306794675] [2024-06-14 11:57:12,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:12,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:12,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:12,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:12,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 259 transitions, 3005 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 11:57:12,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:12,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:12,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:14,173 INFO L124 PetriNetUnfolderBase]: 3644/5901 cut-off events. [2024-06-14 11:57:14,174 INFO L125 PetriNetUnfolderBase]: For 916863/916866 co-relation queries the response was YES. [2024-06-14 11:57:14,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53020 conditions, 5901 events. 3644/5901 cut-off events. For 916863/916866 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36684 event pairs, 816 based on Foata normal form. 16/5910 useless extension candidates. Maximal degree in co-relation 52898. Up to 4772 conditions per place. [2024-06-14 11:57:14,245 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 207 selfloop transitions, 93 changer transitions 0/305 dead transitions. [2024-06-14 11:57:14,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 305 transitions, 4135 flow [2024-06-14 11:57:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:57:14,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 11:57:14,247 INFO L175 Difference]: Start difference. First operand has 247 places, 259 transitions, 3005 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:57:14,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 305 transitions, 4135 flow [2024-06-14 11:57:14,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 305 transitions, 3924 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:14,966 INFO L231 Difference]: Finished difference. Result has 249 places, 260 transitions, 3044 flow [2024-06-14 11:57:14,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3044, PETRI_PLACES=249, PETRI_TRANSITIONS=260} [2024-06-14 11:57:14,966 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-14 11:57:14,967 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 260 transitions, 3044 flow [2024-06-14 11:57:14,967 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 11:57:14,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:14,967 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 11:57:14,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:57:14,967 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 11:57:14,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 802715964, now seen corresponding path program 19 times [2024-06-14 11:57:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:14,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130557010] [2024-06-14 11:57:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:15,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130557010] [2024-06-14 11:57:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130557010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214748189] [2024-06-14 11:57:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:16,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:16,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 260 transitions, 3044 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 11:57:16,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:16,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:17,638 INFO L124 PetriNetUnfolderBase]: 3719/6026 cut-off events. [2024-06-14 11:57:17,638 INFO L125 PetriNetUnfolderBase]: For 952896/952899 co-relation queries the response was YES. [2024-06-14 11:57:17,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54042 conditions, 6026 events. 3719/6026 cut-off events. For 952896/952899 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37770 event pairs, 846 based on Foata normal form. 20/6039 useless extension candidates. Maximal degree in co-relation 53919. Up to 5188 conditions per place. [2024-06-14 11:57:17,713 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 207 selfloop transitions, 89 changer transitions 0/301 dead transitions. [2024-06-14 11:57:17,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 301 transitions, 3846 flow [2024-06-14 11:57:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 11:57:17,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:57:17,715 INFO L175 Difference]: Start difference. First operand has 249 places, 260 transitions, 3044 flow. Second operand 10 states and 200 transitions. [2024-06-14 11:57:17,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 301 transitions, 3846 flow [2024-06-14 11:57:18,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 301 transitions, 3520 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 11:57:18,539 INFO L231 Difference]: Finished difference. Result has 250 places, 261 transitions, 2965 flow [2024-06-14 11:57:18,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2965, PETRI_PLACES=250, PETRI_TRANSITIONS=261} [2024-06-14 11:57:18,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-14 11:57:18,540 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 261 transitions, 2965 flow [2024-06-14 11:57:18,540 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 11:57:18,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:18,540 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 11:57:18,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:57:18,540 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 11:57:18,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash 164297182, now seen corresponding path program 20 times [2024-06-14 11:57:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:18,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173002595] [2024-06-14 11:57:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173002595] [2024-06-14 11:57:19,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173002595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:19,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:19,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217070114] [2024-06-14 11:57:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:19,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:19,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:19,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:19,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:19,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:19,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 261 transitions, 2965 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 11:57:19,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:19,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:19,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:21,172 INFO L124 PetriNetUnfolderBase]: 3683/5970 cut-off events. [2024-06-14 11:57:21,173 INFO L125 PetriNetUnfolderBase]: For 904742/904745 co-relation queries the response was YES. [2024-06-14 11:57:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51400 conditions, 5970 events. 3683/5970 cut-off events. For 904742/904745 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37294 event pairs, 833 based on Foata normal form. 20/5983 useless extension candidates. Maximal degree in co-relation 51277. Up to 5132 conditions per place. [2024-06-14 11:57:21,253 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 199 selfloop transitions, 96 changer transitions 0/300 dead transitions. [2024-06-14 11:57:21,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 300 transitions, 3699 flow [2024-06-14 11:57:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:57:21,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:57:21,255 INFO L175 Difference]: Start difference. First operand has 250 places, 261 transitions, 2965 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:57:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 300 transitions, 3699 flow [2024-06-14 11:57:22,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 300 transitions, 3460 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:22,217 INFO L231 Difference]: Finished difference. Result has 252 places, 261 transitions, 2925 flow [2024-06-14 11:57:22,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2925, PETRI_PLACES=252, PETRI_TRANSITIONS=261} [2024-06-14 11:57:22,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-14 11:57:22,218 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 261 transitions, 2925 flow [2024-06-14 11:57:22,218 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 11:57:22,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:22,218 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 11:57:22,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:57:22,219 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:22,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -699162938, now seen corresponding path program 3 times [2024-06-14 11:57:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:22,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874306103] [2024-06-14 11:57:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:22,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874306103] [2024-06-14 11:57:22,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874306103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:22,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:22,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49112637] [2024-06-14 11:57:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:22,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:23,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:23,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 261 transitions, 2925 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 11:57:23,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:23,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:23,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:24,115 INFO L124 PetriNetUnfolderBase]: 3470/5709 cut-off events. [2024-06-14 11:57:24,115 INFO L125 PetriNetUnfolderBase]: For 847288/847294 co-relation queries the response was YES. [2024-06-14 11:57:24,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49626 conditions, 5709 events. 3470/5709 cut-off events. For 847288/847294 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36560 event pairs, 874 based on Foata normal form. 5/5637 useless extension candidates. Maximal degree in co-relation 49502. Up to 5259 conditions per place. [2024-06-14 11:57:24,186 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 230 selfloop transitions, 19 changer transitions 0/278 dead transitions. [2024-06-14 11:57:24,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 278 transitions, 3470 flow [2024-06-14 11:57:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 11:57:24,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 11:57:24,187 INFO L175 Difference]: Start difference. First operand has 252 places, 261 transitions, 2925 flow. Second operand 7 states and 136 transitions. [2024-06-14 11:57:24,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 278 transitions, 3470 flow [2024-06-14 11:57:25,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 278 transitions, 3235 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 11:57:25,021 INFO L231 Difference]: Finished difference. Result has 250 places, 262 transitions, 2743 flow [2024-06-14 11:57:25,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2743, PETRI_PLACES=250, PETRI_TRANSITIONS=262} [2024-06-14 11:57:25,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-14 11:57:25,022 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 262 transitions, 2743 flow [2024-06-14 11:57:25,022 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 11:57:25,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:25,022 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 11:57:25,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:57:25,023 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:25,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash -685830458, now seen corresponding path program 4 times [2024-06-14 11:57:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327407211] [2024-06-14 11:57:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:25,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327407211] [2024-06-14 11:57:25,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327407211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:25,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:25,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:25,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902137139] [2024-06-14 11:57:25,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:25,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:25,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:25,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:25,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:25,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 262 transitions, 2743 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 11:57:25,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:25,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:25,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:26,980 INFO L124 PetriNetUnfolderBase]: 3475/5716 cut-off events. [2024-06-14 11:57:26,980 INFO L125 PetriNetUnfolderBase]: For 863595/863601 co-relation queries the response was YES. [2024-06-14 11:57:27,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49393 conditions, 5716 events. 3475/5716 cut-off events. For 863595/863601 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36603 event pairs, 874 based on Foata normal form. 5/5644 useless extension candidates. Maximal degree in co-relation 49268. Up to 5257 conditions per place. [2024-06-14 11:57:27,050 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 222 selfloop transitions, 27 changer transitions 0/278 dead transitions. [2024-06-14 11:57:27,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 278 transitions, 3337 flow [2024-06-14 11:57:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:57:27,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 11:57:27,051 INFO L175 Difference]: Start difference. First operand has 250 places, 262 transitions, 2743 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:57:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 278 transitions, 3337 flow [2024-06-14 11:57:27,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 278 transitions, 3295 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:27,803 INFO L231 Difference]: Finished difference. Result has 252 places, 265 transitions, 2831 flow [2024-06-14 11:57:27,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2831, PETRI_PLACES=252, PETRI_TRANSITIONS=265} [2024-06-14 11:57:27,803 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-14 11:57:27,803 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 265 transitions, 2831 flow [2024-06-14 11:57:27,804 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 11:57:27,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:27,804 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 11:57:27,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:57:27,804 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 11:57:27,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1097628832, now seen corresponding path program 5 times [2024-06-14 11:57:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:27,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622845912] [2024-06-14 11:57:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:28,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:28,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622845912] [2024-06-14 11:57:28,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622845912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:28,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:28,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674325667] [2024-06-14 11:57:28,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:28,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:28,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:28,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:28,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 265 transitions, 2831 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 11:57:28,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:28,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:28,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:29,691 INFO L124 PetriNetUnfolderBase]: 3480/5727 cut-off events. [2024-06-14 11:57:29,691 INFO L125 PetriNetUnfolderBase]: For 881713/881722 co-relation queries the response was YES. [2024-06-14 11:57:29,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50007 conditions, 5727 events. 3480/5727 cut-off events. For 881713/881722 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36716 event pairs, 884 based on Foata normal form. 7/5655 useless extension candidates. Maximal degree in co-relation 49881. Up to 5242 conditions per place. [2024-06-14 11:57:29,759 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 212 selfloop transitions, 44 changer transitions 0/285 dead transitions. [2024-06-14 11:57:29,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 285 transitions, 3718 flow [2024-06-14 11:57:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:57:29,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 11:57:29,760 INFO L175 Difference]: Start difference. First operand has 252 places, 265 transitions, 2831 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:57:29,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 285 transitions, 3718 flow [2024-06-14 11:57:30,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 285 transitions, 3610 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:30,618 INFO L231 Difference]: Finished difference. Result has 255 places, 274 transitions, 3020 flow [2024-06-14 11:57:30,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3020, PETRI_PLACES=255, PETRI_TRANSITIONS=274} [2024-06-14 11:57:30,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-14 11:57:30,619 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 274 transitions, 3020 flow [2024-06-14 11:57:30,619 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 11:57:30,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:30,619 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 11:57:30,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:57:30,619 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 11:57:30,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1097836222, now seen corresponding path program 6 times [2024-06-14 11:57:30,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:30,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042887162] [2024-06-14 11:57:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:31,503 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 11:57:31,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:31,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042887162] [2024-06-14 11:57:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042887162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:31,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:31,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:57:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278322853] [2024-06-14 11:57:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:31,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:57:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:57:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:57:31,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:57:31,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 274 transitions, 3020 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 11:57:31,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:31,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:57:31,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:32,594 INFO L124 PetriNetUnfolderBase]: 3477/5721 cut-off events. [2024-06-14 11:57:32,594 INFO L125 PetriNetUnfolderBase]: For 897974/897983 co-relation queries the response was YES. [2024-06-14 11:57:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50403 conditions, 5721 events. 3477/5721 cut-off events. For 897974/897983 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36649 event pairs, 881 based on Foata normal form. 7/5649 useless extension candidates. Maximal degree in co-relation 50275. Up to 5239 conditions per place. [2024-06-14 11:57:32,661 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 211 selfloop transitions, 44 changer transitions 0/284 dead transitions. [2024-06-14 11:57:32,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 284 transitions, 3554 flow [2024-06-14 11:57:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:57:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:57:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:57:32,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:57:32,662 INFO L175 Difference]: Start difference. First operand has 255 places, 274 transitions, 3020 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:57:32,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 284 transitions, 3554 flow [2024-06-14 11:57:33,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 284 transitions, 3410 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-14 11:57:33,492 INFO L231 Difference]: Finished difference. Result has 260 places, 274 transitions, 2970 flow [2024-06-14 11:57:33,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2970, PETRI_PLACES=260, PETRI_TRANSITIONS=274} [2024-06-14 11:57:33,492 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 215 predicate places. [2024-06-14 11:57:33,493 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 274 transitions, 2970 flow [2024-06-14 11:57:33,493 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 11:57:33,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:33,493 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 11:57:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:57:33,493 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:33,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:33,494 INFO L85 PathProgramCache]: Analyzing trace with hash 234025890, now seen corresponding path program 2 times [2024-06-14 11:57:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845106734] [2024-06-14 11:57:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:34,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:34,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845106734] [2024-06-14 11:57:34,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845106734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:34,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:34,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621631723] [2024-06-14 11:57:34,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:34,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:34,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:34,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 274 transitions, 2970 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 11:57:34,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:34,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:34,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:36,064 INFO L124 PetriNetUnfolderBase]: 3704/6026 cut-off events. [2024-06-14 11:57:36,064 INFO L125 PetriNetUnfolderBase]: For 927256/927262 co-relation queries the response was YES. [2024-06-14 11:57:36,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51877 conditions, 6026 events. 3704/6026 cut-off events. For 927256/927262 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37959 event pairs, 899 based on Foata normal form. 8/6029 useless extension candidates. Maximal degree in co-relation 51747. Up to 5563 conditions per place. [2024-06-14 11:57:36,139 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 260 selfloop transitions, 48 changer transitions 0/313 dead transitions. [2024-06-14 11:57:36,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 313 transitions, 3783 flow [2024-06-14 11:57:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 11:57:36,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:57:36,140 INFO L175 Difference]: Start difference. First operand has 260 places, 274 transitions, 2970 flow. Second operand 10 states and 190 transitions. [2024-06-14 11:57:36,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 313 transitions, 3783 flow [2024-06-14 11:57:37,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 313 transitions, 3663 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:37,135 INFO L231 Difference]: Finished difference. Result has 265 places, 279 transitions, 3068 flow [2024-06-14 11:57:37,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3068, PETRI_PLACES=265, PETRI_TRANSITIONS=279} [2024-06-14 11:57:37,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 11:57:37,136 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 279 transitions, 3068 flow [2024-06-14 11:57:37,136 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 11:57:37,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:37,136 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 11:57:37,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:57:37,137 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:37,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash 172587016, now seen corresponding path program 3 times [2024-06-14 11:57:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:37,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737046870] [2024-06-14 11:57:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:38,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:38,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737046870] [2024-06-14 11:57:38,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737046870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:38,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:38,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:38,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717541852] [2024-06-14 11:57:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:38,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:38,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:38,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:38,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 279 transitions, 3068 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 11:57:38,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:38,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:38,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:39,884 INFO L124 PetriNetUnfolderBase]: 3732/6064 cut-off events. [2024-06-14 11:57:39,884 INFO L125 PetriNetUnfolderBase]: For 951603/951609 co-relation queries the response was YES. [2024-06-14 11:57:39,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53017 conditions, 6064 events. 3732/6064 cut-off events. For 951603/951609 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38152 event pairs, 894 based on Foata normal form. 8/6067 useless extension candidates. Maximal degree in co-relation 52886. Up to 5602 conditions per place. [2024-06-14 11:57:39,965 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 257 selfloop transitions, 59 changer transitions 0/321 dead transitions. [2024-06-14 11:57:39,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 321 transitions, 3943 flow [2024-06-14 11:57:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 11:57:39,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 11:57:39,967 INFO L175 Difference]: Start difference. First operand has 265 places, 279 transitions, 3068 flow. Second operand 10 states and 188 transitions. [2024-06-14 11:57:39,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 321 transitions, 3943 flow [2024-06-14 11:57:41,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 321 transitions, 3754 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:41,016 INFO L231 Difference]: Finished difference. Result has 269 places, 289 transitions, 3190 flow [2024-06-14 11:57:41,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3190, PETRI_PLACES=269, PETRI_TRANSITIONS=289} [2024-06-14 11:57:41,017 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-14 11:57:41,017 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 289 transitions, 3190 flow [2024-06-14 11:57:41,017 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 11:57:41,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:41,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:41,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:57:41,017 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:41,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 786769382, now seen corresponding path program 4 times [2024-06-14 11:57:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:41,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577540521] [2024-06-14 11:57:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:41,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:42,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577540521] [2024-06-14 11:57:42,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577540521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:42,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:42,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424916875] [2024-06-14 11:57:42,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:42,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:42,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 289 transitions, 3190 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 11:57:42,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:42,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:43,585 INFO L124 PetriNetUnfolderBase]: 3749/6091 cut-off events. [2024-06-14 11:57:43,585 INFO L125 PetriNetUnfolderBase]: For 973813/973819 co-relation queries the response was YES. [2024-06-14 11:57:43,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53915 conditions, 6091 events. 3749/6091 cut-off events. For 973813/973819 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38387 event pairs, 842 based on Foata normal form. 8/6094 useless extension candidates. Maximal degree in co-relation 53782. Up to 5523 conditions per place. [2024-06-14 11:57:43,663 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 255 selfloop transitions, 68 changer transitions 0/328 dead transitions. [2024-06-14 11:57:43,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 328 transitions, 4438 flow [2024-06-14 11:57:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 11:57:43,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-14 11:57:43,665 INFO L175 Difference]: Start difference. First operand has 269 places, 289 transitions, 3190 flow. Second operand 10 states and 191 transitions. [2024-06-14 11:57:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 328 transitions, 4438 flow [2024-06-14 11:57:44,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 328 transitions, 4273 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:44,792 INFO L231 Difference]: Finished difference. Result has 274 places, 293 transitions, 3356 flow [2024-06-14 11:57:44,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3356, PETRI_PLACES=274, PETRI_TRANSITIONS=293} [2024-06-14 11:57:44,793 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-14 11:57:44,793 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 293 transitions, 3356 flow [2024-06-14 11:57:44,793 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 11:57:44,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:44,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:44,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:57:44,794 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:44,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash 164543446, now seen corresponding path program 5 times [2024-06-14 11:57:44,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:44,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054264566] [2024-06-14 11:57:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:44,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:45,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054264566] [2024-06-14 11:57:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054264566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:45,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:45,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770022104] [2024-06-14 11:57:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:45,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:45,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 293 transitions, 3356 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 11:57:45,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:45,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:45,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:47,518 INFO L124 PetriNetUnfolderBase]: 3766/6128 cut-off events. [2024-06-14 11:57:47,518 INFO L125 PetriNetUnfolderBase]: For 993476/993482 co-relation queries the response was YES. [2024-06-14 11:57:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53488 conditions, 6128 events. 3766/6128 cut-off events. For 993476/993482 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38718 event pairs, 904 based on Foata normal form. 8/6131 useless extension candidates. Maximal degree in co-relation 53354. Up to 5656 conditions per place. [2024-06-14 11:57:47,589 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 266 selfloop transitions, 57 changer transitions 0/328 dead transitions. [2024-06-14 11:57:47,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 328 transitions, 4191 flow [2024-06-14 11:57:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 11:57:47,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-14 11:57:47,590 INFO L175 Difference]: Start difference. First operand has 274 places, 293 transitions, 3356 flow. Second operand 10 states and 189 transitions. [2024-06-14 11:57:47,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 328 transitions, 4191 flow [2024-06-14 11:57:48,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 328 transitions, 3963 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:48,773 INFO L231 Difference]: Finished difference. Result has 279 places, 296 transitions, 3372 flow [2024-06-14 11:57:48,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3372, PETRI_PLACES=279, PETRI_TRANSITIONS=296} [2024-06-14 11:57:48,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 11:57:48,774 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 296 transitions, 3372 flow [2024-06-14 11:57:48,774 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 11:57:48,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:48,774 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 11:57:48,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:57:48,774 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:48,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash 833289174, now seen corresponding path program 6 times [2024-06-14 11:57:48,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:48,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865695391] [2024-06-14 11:57:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:48,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:49,863 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 11:57:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865695391] [2024-06-14 11:57:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865695391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:49,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:49,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:57:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173371308] [2024-06-14 11:57:49,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:49,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:57:49,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:57:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:57:49,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:57:49,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 296 transitions, 3372 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 11:57:49,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:49,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:57:49,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:51,558 INFO L124 PetriNetUnfolderBase]: 3758/6126 cut-off events. [2024-06-14 11:57:51,559 INFO L125 PetriNetUnfolderBase]: For 992877/992883 co-relation queries the response was YES. [2024-06-14 11:57:51,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53033 conditions, 6126 events. 3758/6126 cut-off events. For 992877/992883 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38813 event pairs, 912 based on Foata normal form. 8/6129 useless extension candidates. Maximal degree in co-relation 52896. Up to 5644 conditions per place. [2024-06-14 11:57:51,634 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 269 selfloop transitions, 54 changer transitions 0/328 dead transitions. [2024-06-14 11:57:51,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 328 transitions, 4098 flow [2024-06-14 11:57:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:57:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:57:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 11:57:51,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-14 11:57:51,635 INFO L175 Difference]: Start difference. First operand has 279 places, 296 transitions, 3372 flow. Second operand 10 states and 191 transitions. [2024-06-14 11:57:51,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 328 transitions, 4098 flow [2024-06-14 11:57:53,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 328 transitions, 3889 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:53,027 INFO L231 Difference]: Finished difference. Result has 282 places, 296 transitions, 3278 flow [2024-06-14 11:57:53,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3278, PETRI_PLACES=282, PETRI_TRANSITIONS=296} [2024-06-14 11:57:53,027 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-14 11:57:53,027 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 296 transitions, 3278 flow [2024-06-14 11:57:53,028 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 11:57:53,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:53,028 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 11:57:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:57:53,028 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 11:57:53,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1103332832, now seen corresponding path program 2 times [2024-06-14 11:57:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149774456] [2024-06-14 11:57:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149774456] [2024-06-14 11:57:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149774456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:54,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:54,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:54,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244006351] [2024-06-14 11:57:54,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:54,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:54,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:54,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:57:54,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 296 transitions, 3278 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 11:57:54,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:54,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:57:54,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:55,311 INFO L124 PetriNetUnfolderBase]: 3402/5683 cut-off events. [2024-06-14 11:57:55,312 INFO L125 PetriNetUnfolderBase]: For 1011351/1011363 co-relation queries the response was YES. [2024-06-14 11:57:55,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50548 conditions, 5683 events. 3402/5683 cut-off events. For 1011351/1011363 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 37358 event pairs, 848 based on Foata normal form. 4/5596 useless extension candidates. Maximal degree in co-relation 50410. Up to 5045 conditions per place. [2024-06-14 11:57:55,388 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 224 selfloop transitions, 28 changer transitions 0/311 dead transitions. [2024-06-14 11:57:55,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 311 transitions, 3872 flow [2024-06-14 11:57:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:57:55,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:57:55,389 INFO L175 Difference]: Start difference. First operand has 282 places, 296 transitions, 3278 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:57:55,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 311 transitions, 3872 flow [2024-06-14 11:57:56,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 311 transitions, 3685 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-14 11:57:56,841 INFO L231 Difference]: Finished difference. Result has 277 places, 299 transitions, 3217 flow [2024-06-14 11:57:56,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=277, PETRI_TRANSITIONS=299} [2024-06-14 11:57:56,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-14 11:57:56,842 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 299 transitions, 3217 flow [2024-06-14 11:57:56,842 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 11:57:56,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:56,842 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 11:57:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:57:56,842 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 11:57:56,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1088600702, now seen corresponding path program 3 times [2024-06-14 11:57:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:56,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725531151] [2024-06-14 11:57:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:57,918 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 11:57:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:57,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725531151] [2024-06-14 11:57:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725531151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:57,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:57,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:57,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455131581] [2024-06-14 11:57:57,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:57,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:58,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:57:58,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 299 transitions, 3217 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 11:57:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:57:58,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:59,147 INFO L124 PetriNetUnfolderBase]: 3407/5713 cut-off events. [2024-06-14 11:57:59,148 INFO L125 PetriNetUnfolderBase]: For 1042902/1042922 co-relation queries the response was YES. [2024-06-14 11:57:59,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51183 conditions, 5713 events. 3407/5713 cut-off events. For 1042902/1042922 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37884 event pairs, 857 based on Foata normal form. 6/5629 useless extension candidates. Maximal degree in co-relation 51048. Up to 5027 conditions per place. [2024-06-14 11:57:59,222 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 218 selfloop transitions, 47 changer transitions 0/324 dead transitions. [2024-06-14 11:57:59,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 324 transitions, 4379 flow [2024-06-14 11:57:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:57:59,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:57:59,224 INFO L175 Difference]: Start difference. First operand has 277 places, 299 transitions, 3217 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:57:59,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 324 transitions, 4379 flow [2024-06-14 11:58:00,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 324 transitions, 4279 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:00,905 INFO L231 Difference]: Finished difference. Result has 279 places, 308 transitions, 3415 flow [2024-06-14 11:58:00,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3415, PETRI_PLACES=279, PETRI_TRANSITIONS=308} [2024-06-14 11:58:00,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 11:58:00,905 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 308 transitions, 3415 flow [2024-06-14 11:58:00,906 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 11:58:00,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:00,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:00,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:58:00,906 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 11:58:00,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1088095712, now seen corresponding path program 4 times [2024-06-14 11:58:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:00,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233123395] [2024-06-14 11:58:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:00,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:02,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:02,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233123395] [2024-06-14 11:58:02,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233123395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:02,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:02,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014551995] [2024-06-14 11:58:02,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:02,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:58:02,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 308 transitions, 3415 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 11:58:02,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:02,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:58:02,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:03,367 INFO L124 PetriNetUnfolderBase]: 3395/5709 cut-off events. [2024-06-14 11:58:03,367 INFO L125 PetriNetUnfolderBase]: For 1046906/1046914 co-relation queries the response was YES. [2024-06-14 11:58:03,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51225 conditions, 5709 events. 3395/5709 cut-off events. For 1046906/1046914 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37819 event pairs, 850 based on Foata normal form. 6/5631 useless extension candidates. Maximal degree in co-relation 51089. Up to 5090 conditions per place. [2024-06-14 11:58:03,444 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 245 selfloop transitions, 17 changer transitions 0/321 dead transitions. [2024-06-14 11:58:03,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 321 transitions, 3977 flow [2024-06-14 11:58:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:58:03,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:58:03,445 INFO L175 Difference]: Start difference. First operand has 279 places, 308 transitions, 3415 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:58:03,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 321 transitions, 3977 flow [2024-06-14 11:58:04,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 321 transitions, 3842 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 11:58:04,512 INFO L231 Difference]: Finished difference. Result has 284 places, 308 transitions, 3320 flow [2024-06-14 11:58:04,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3320, PETRI_PLACES=284, PETRI_TRANSITIONS=308} [2024-06-14 11:58:04,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-14 11:58:04,515 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 308 transitions, 3320 flow [2024-06-14 11:58:04,515 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 11:58:04,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:04,515 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 11:58:04,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:58:04,516 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 11:58:04,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash -691536442, now seen corresponding path program 1 times [2024-06-14 11:58:04,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904157381] [2024-06-14 11:58:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:05,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904157381] [2024-06-14 11:58:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904157381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:05,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964120203] [2024-06-14 11:58:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:05,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:05,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:05,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 308 transitions, 3320 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 11:58:05,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:05,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:06,852 INFO L124 PetriNetUnfolderBase]: 3674/6068 cut-off events. [2024-06-14 11:58:06,853 INFO L125 PetriNetUnfolderBase]: For 1060775/1060775 co-relation queries the response was YES. [2024-06-14 11:58:06,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53331 conditions, 6068 events. 3674/6068 cut-off events. For 1060775/1060775 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39190 event pairs, 878 based on Foata normal form. 2/6063 useless extension candidates. Maximal degree in co-relation 53193. Up to 5631 conditions per place. [2024-06-14 11:58:06,923 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 305 selfloop transitions, 17 changer transitions 0/332 dead transitions. [2024-06-14 11:58:06,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 332 transitions, 4082 flow [2024-06-14 11:58:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:58:06,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:58:06,925 INFO L175 Difference]: Start difference. First operand has 284 places, 308 transitions, 3320 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:58:06,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 332 transitions, 4082 flow [2024-06-14 11:58:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 332 transitions, 4006 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:08,080 INFO L231 Difference]: Finished difference. Result has 284 places, 311 transitions, 3354 flow [2024-06-14 11:58:08,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3354, PETRI_PLACES=284, PETRI_TRANSITIONS=311} [2024-06-14 11:58:08,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-14 11:58:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 311 transitions, 3354 flow [2024-06-14 11:58:08,081 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 11:58:08,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:08,081 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 11:58:08,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:58:08,081 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 11:58:08,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash 165313346, now seen corresponding path program 2 times [2024-06-14 11:58:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915372449] [2024-06-14 11:58:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:08,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915372449] [2024-06-14 11:58:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915372449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:08,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:08,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:08,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787576873] [2024-06-14 11:58:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:08,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:09,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:09,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 311 transitions, 3354 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 11:58:09,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:09,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:09,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:10,519 INFO L124 PetriNetUnfolderBase]: 3679/6089 cut-off events. [2024-06-14 11:58:10,519 INFO L125 PetriNetUnfolderBase]: For 1081506/1081506 co-relation queries the response was YES. [2024-06-14 11:58:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54084 conditions, 6089 events. 3679/6089 cut-off events. For 1081506/1081506 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39442 event pairs, 886 based on Foata normal form. 2/6084 useless extension candidates. Maximal degree in co-relation 53946. Up to 5631 conditions per place. [2024-06-14 11:58:10,601 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 301 selfloop transitions, 22 changer transitions 0/333 dead transitions. [2024-06-14 11:58:10,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 333 transitions, 4120 flow [2024-06-14 11:58:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:58:10,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:58:10,603 INFO L175 Difference]: Start difference. First operand has 284 places, 311 transitions, 3354 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:58:10,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 333 transitions, 4120 flow [2024-06-14 11:58:12,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 333 transitions, 4032 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:12,347 INFO L231 Difference]: Finished difference. Result has 286 places, 314 transitions, 3392 flow [2024-06-14 11:58:12,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3392, PETRI_PLACES=286, PETRI_TRANSITIONS=314} [2024-06-14 11:58:12,348 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-14 11:58:12,348 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 314 transitions, 3392 flow [2024-06-14 11:58:12,348 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 11:58:12,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:12,348 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 11:58:12,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:58:12,349 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 11:58:12,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash -691386495, now seen corresponding path program 1 times [2024-06-14 11:58:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:12,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848876974] [2024-06-14 11:58:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:12,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:13,371 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 11:58:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:13,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848876974] [2024-06-14 11:58:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848876974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:13,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:13,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:13,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936186363] [2024-06-14 11:58:13,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:13,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:13,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:13,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:13,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:13,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 314 transitions, 3392 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 11:58:13,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:13,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:13,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:14,807 INFO L124 PetriNetUnfolderBase]: 3682/6094 cut-off events. [2024-06-14 11:58:14,807 INFO L125 PetriNetUnfolderBase]: For 1102534/1102536 co-relation queries the response was YES. [2024-06-14 11:58:14,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54699 conditions, 6094 events. 3682/6094 cut-off events. For 1102534/1102536 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39515 event pairs, 885 based on Foata normal form. 2/6088 useless extension candidates. Maximal degree in co-relation 54560. Up to 5654 conditions per place. [2024-06-14 11:58:14,887 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-14 11:58:14,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 334 transitions, 4148 flow [2024-06-14 11:58:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:58:14,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 11:58:14,889 INFO L175 Difference]: Start difference. First operand has 286 places, 314 transitions, 3392 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:58:14,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 334 transitions, 4148 flow [2024-06-14 11:58:16,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 334 transitions, 4044 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:16,511 INFO L231 Difference]: Finished difference. Result has 288 places, 317 transitions, 3400 flow [2024-06-14 11:58:16,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3400, PETRI_PLACES=288, PETRI_TRANSITIONS=317} [2024-06-14 11:58:16,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-14 11:58:16,512 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 317 transitions, 3400 flow [2024-06-14 11:58:16,512 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 11:58:16,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:16,513 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 11:58:16,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:58:16,513 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 11:58:16,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash -685814865, now seen corresponding path program 2 times [2024-06-14 11:58:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:16,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751928119] [2024-06-14 11:58:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751928119] [2024-06-14 11:58:17,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751928119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:17,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:17,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:17,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068137646] [2024-06-14 11:58:17,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:17,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:17,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:17,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 317 transitions, 3400 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 11:58:17,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:17,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:17,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:18,977 INFO L124 PetriNetUnfolderBase]: 3713/6129 cut-off events. [2024-06-14 11:58:18,977 INFO L125 PetriNetUnfolderBase]: For 1141669/1141673 co-relation queries the response was YES. [2024-06-14 11:58:19,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55839 conditions, 6129 events. 3713/6129 cut-off events. For 1141669/1141673 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39641 event pairs, 877 based on Foata normal form. 2/6123 useless extension candidates. Maximal degree in co-relation 55699. Up to 5662 conditions per place. [2024-06-14 11:58:19,054 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 299 selfloop transitions, 31 changer transitions 0/340 dead transitions. [2024-06-14 11:58:19,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 340 transitions, 4466 flow [2024-06-14 11:58:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:58:19,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:58:19,056 INFO L175 Difference]: Start difference. First operand has 288 places, 317 transitions, 3400 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:58:19,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 340 transitions, 4466 flow [2024-06-14 11:58:20,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 340 transitions, 4376 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:20,874 INFO L231 Difference]: Finished difference. Result has 290 places, 323 transitions, 3533 flow [2024-06-14 11:58:20,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3533, PETRI_PLACES=290, PETRI_TRANSITIONS=323} [2024-06-14 11:58:20,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-14 11:58:20,874 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 323 transitions, 3533 flow [2024-06-14 11:58:20,875 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 11:58:20,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:20,875 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 11:58:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:58:20,875 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:20,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash 174530226, now seen corresponding path program 3 times [2024-06-14 11:58:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:20,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065083134] [2024-06-14 11:58:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:21,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:21,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065083134] [2024-06-14 11:58:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065083134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:21,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:21,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:21,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434336436] [2024-06-14 11:58:21,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:21,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:21,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:21,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 323 transitions, 3533 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 11:58:21,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:21,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:21,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:23,117 INFO L124 PetriNetUnfolderBase]: 3723/6145 cut-off events. [2024-06-14 11:58:23,118 INFO L125 PetriNetUnfolderBase]: For 1161698/1161700 co-relation queries the response was YES. [2024-06-14 11:58:23,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56470 conditions, 6145 events. 3723/6145 cut-off events. For 1161698/1161700 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39761 event pairs, 879 based on Foata normal form. 2/6139 useless extension candidates. Maximal degree in co-relation 56329. Up to 5680 conditions per place. [2024-06-14 11:58:23,207 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 303 selfloop transitions, 29 changer transitions 0/342 dead transitions. [2024-06-14 11:58:23,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 342 transitions, 4319 flow [2024-06-14 11:58:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:58:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:58:23,209 INFO L175 Difference]: Start difference. First operand has 290 places, 323 transitions, 3533 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:58:23,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 342 transitions, 4319 flow [2024-06-14 11:58:25,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 342 transitions, 4223 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:25,292 INFO L231 Difference]: Finished difference. Result has 294 places, 326 transitions, 3587 flow [2024-06-14 11:58:25,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3587, PETRI_PLACES=294, PETRI_TRANSITIONS=326} [2024-06-14 11:58:25,293 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 11:58:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 326 transitions, 3587 flow [2024-06-14 11:58:25,293 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 11:58:25,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:25,293 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 11:58:25,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:58:25,294 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash 170877753, now seen corresponding path program 3 times [2024-06-14 11:58:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923022256] [2024-06-14 11:58:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923022256] [2024-06-14 11:58:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923022256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:26,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:26,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106087304] [2024-06-14 11:58:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:26,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:26,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 326 transitions, 3587 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 11:58:26,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:26,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:27,857 INFO L124 PetriNetUnfolderBase]: 3717/6137 cut-off events. [2024-06-14 11:58:27,857 INFO L125 PetriNetUnfolderBase]: For 1170912/1170914 co-relation queries the response was YES. [2024-06-14 11:58:27,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56749 conditions, 6137 events. 3717/6137 cut-off events. For 1170912/1170914 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39680 event pairs, 878 based on Foata normal form. 2/6131 useless extension candidates. Maximal degree in co-relation 56606. Up to 5697 conditions per place. [2024-06-14 11:58:27,939 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 311 selfloop transitions, 22 changer transitions 0/343 dead transitions. [2024-06-14 11:58:27,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 343 transitions, 4353 flow [2024-06-14 11:58:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:58:27,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 11:58:27,941 INFO L175 Difference]: Start difference. First operand has 294 places, 326 transitions, 3587 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:58:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 343 transitions, 4353 flow [2024-06-14 11:58:29,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 343 transitions, 4225 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:29,633 INFO L231 Difference]: Finished difference. Result has 296 places, 329 transitions, 3581 flow [2024-06-14 11:58:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3581, PETRI_PLACES=296, PETRI_TRANSITIONS=329} [2024-06-14 11:58:29,634 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-14 11:58:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 329 transitions, 3581 flow [2024-06-14 11:58:29,634 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 11:58:29,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:29,634 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 11:58:29,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:58:29,635 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:29,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1088416469, now seen corresponding path program 4 times [2024-06-14 11:58:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:29,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512115199] [2024-06-14 11:58:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512115199] [2024-06-14 11:58:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512115199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136400828] [2024-06-14 11:58:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:30,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 329 transitions, 3581 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 11:58:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:32,108 INFO L124 PetriNetUnfolderBase]: 3727/6152 cut-off events. [2024-06-14 11:58:32,108 INFO L125 PetriNetUnfolderBase]: For 1194550/1194557 co-relation queries the response was YES. [2024-06-14 11:58:32,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57093 conditions, 6152 events. 3727/6152 cut-off events. For 1194550/1194557 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39805 event pairs, 878 based on Foata normal form. 2/6145 useless extension candidates. Maximal degree in co-relation 56949. Up to 5633 conditions per place. [2024-06-14 11:58:32,197 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 53 changer transitions 0/350 dead transitions. [2024-06-14 11:58:32,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 350 transitions, 4695 flow [2024-06-14 11:58:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:58:32,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:58:32,198 INFO L175 Difference]: Start difference. First operand has 296 places, 329 transitions, 3581 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:58:32,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 350 transitions, 4695 flow [2024-06-14 11:58:34,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 350 transitions, 4599 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:34,541 INFO L231 Difference]: Finished difference. Result has 298 places, 335 transitions, 3767 flow [2024-06-14 11:58:34,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3767, PETRI_PLACES=298, PETRI_TRANSITIONS=335} [2024-06-14 11:58:34,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-14 11:58:34,541 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 335 transitions, 3767 flow [2024-06-14 11:58:34,541 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 11:58:34,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:34,542 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 11:58:34,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:58:34,542 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:34,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1097613239, now seen corresponding path program 5 times [2024-06-14 11:58:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:34,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570339420] [2024-06-14 11:58:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:34,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:35,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570339420] [2024-06-14 11:58:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570339420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:35,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:35,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159044887] [2024-06-14 11:58:35,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:35,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:35,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 335 transitions, 3767 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 11:58:35,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:35,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:35,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:37,252 INFO L124 PetriNetUnfolderBase]: 3742/6173 cut-off events. [2024-06-14 11:58:37,252 INFO L125 PetriNetUnfolderBase]: For 1213075/1213080 co-relation queries the response was YES. [2024-06-14 11:58:37,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57837 conditions, 6173 events. 3742/6173 cut-off events. For 1213075/1213080 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39955 event pairs, 887 based on Foata normal form. 1/6166 useless extension candidates. Maximal degree in co-relation 57692. Up to 5713 conditions per place. [2024-06-14 11:58:37,344 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 312 selfloop transitions, 33 changer transitions 0/355 dead transitions. [2024-06-14 11:58:37,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 355 transitions, 4885 flow [2024-06-14 11:58:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:58:37,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:58:37,346 INFO L175 Difference]: Start difference. First operand has 298 places, 335 transitions, 3767 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:58:37,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 355 transitions, 4885 flow [2024-06-14 11:58:39,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 355 transitions, 4746 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:39,219 INFO L231 Difference]: Finished difference. Result has 303 places, 343 transitions, 3903 flow [2024-06-14 11:58:39,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3903, PETRI_PLACES=303, PETRI_TRANSITIONS=343} [2024-06-14 11:58:39,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-14 11:58:39,219 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 343 transitions, 3903 flow [2024-06-14 11:58:39,219 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 11:58:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:39,220 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 11:58:39,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:58:39,220 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 11:58:39,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1097620896, now seen corresponding path program 4 times [2024-06-14 11:58:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018423127] [2024-06-14 11:58:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:40,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:40,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018423127] [2024-06-14 11:58:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018423127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:40,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:40,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527745284] [2024-06-14 11:58:40,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:40,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:40,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:40,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 343 transitions, 3903 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 11:58:40,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:40,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:40,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:41,566 INFO L124 PetriNetUnfolderBase]: 3744/6178 cut-off events. [2024-06-14 11:58:41,567 INFO L125 PetriNetUnfolderBase]: For 1226492/1226495 co-relation queries the response was YES. [2024-06-14 11:58:41,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57726 conditions, 6178 events. 3744/6178 cut-off events. For 1226492/1226495 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40002 event pairs, 891 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 57578. Up to 5694 conditions per place. [2024-06-14 11:58:41,659 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 311 selfloop transitions, 38 changer transitions 0/359 dead transitions. [2024-06-14 11:58:41,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 359 transitions, 4721 flow [2024-06-14 11:58:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:58:41,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 11:58:41,661 INFO L175 Difference]: Start difference. First operand has 303 places, 343 transitions, 3903 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:58:41,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 359 transitions, 4721 flow [2024-06-14 11:58:43,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 359 transitions, 4623 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:43,835 INFO L231 Difference]: Finished difference. Result has 307 places, 346 transitions, 3979 flow [2024-06-14 11:58:43,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3979, PETRI_PLACES=307, PETRI_TRANSITIONS=346} [2024-06-14 11:58:43,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-14 11:58:43,835 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 346 transitions, 3979 flow [2024-06-14 11:58:43,836 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 11:58:43,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:43,836 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 11:58:43,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:58:43,836 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 11:58:43,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1281960939, now seen corresponding path program 6 times [2024-06-14 11:58:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:43,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190345960] [2024-06-14 11:58:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:44,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190345960] [2024-06-14 11:58:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190345960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:44,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:44,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821696531] [2024-06-14 11:58:44,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:45,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:45,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 346 transitions, 3979 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 11:58:45,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:45,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:45,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:46,345 INFO L124 PetriNetUnfolderBase]: 3738/6180 cut-off events. [2024-06-14 11:58:46,345 INFO L125 PetriNetUnfolderBase]: For 1236884/1236887 co-relation queries the response was YES. [2024-06-14 11:58:46,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58112 conditions, 6180 events. 3738/6180 cut-off events. For 1236884/1236887 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40185 event pairs, 896 based on Foata normal form. 2/6174 useless extension candidates. Maximal degree in co-relation 57962. Up to 5717 conditions per place. [2024-06-14 11:58:46,432 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 319 selfloop transitions, 29 changer transitions 0/358 dead transitions. [2024-06-14 11:58:46,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 358 transitions, 4714 flow [2024-06-14 11:58:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:58:46,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 11:58:46,433 INFO L175 Difference]: Start difference. First operand has 307 places, 346 transitions, 3979 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:58:46,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 358 transitions, 4714 flow [2024-06-14 11:58:48,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 358 transitions, 4492 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:48,928 INFO L231 Difference]: Finished difference. Result has 309 places, 347 transitions, 3836 flow [2024-06-14 11:58:48,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=309, PETRI_TRANSITIONS=347} [2024-06-14 11:58:48,928 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-14 11:58:48,928 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 347 transitions, 3836 flow [2024-06-14 11:58:48,929 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 11:58:48,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:48,929 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 11:58:48,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:58:48,929 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 11:58:48,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1088077856, now seen corresponding path program 1 times [2024-06-14 11:58:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:48,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207285018] [2024-06-14 11:58:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:48,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:50,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207285018] [2024-06-14 11:58:50,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207285018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:50,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:50,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562136438] [2024-06-14 11:58:50,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:50,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:50,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:50,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:58:50,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 347 transitions, 3836 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 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 11:58:50,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:50,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:58:50,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:51,791 INFO L124 PetriNetUnfolderBase]: 3503/5862 cut-off events. [2024-06-14 11:58:51,791 INFO L125 PetriNetUnfolderBase]: For 1243524/1243528 co-relation queries the response was YES. [2024-06-14 11:58:51,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56286 conditions, 5862 events. 3503/5862 cut-off events. For 1243524/1243528 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38648 event pairs, 850 based on Foata normal form. 2/5780 useless extension candidates. Maximal degree in co-relation 56135. Up to 5191 conditions per place. [2024-06-14 11:58:51,882 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 279 selfloop transitions, 16 changer transitions 0/362 dead transitions. [2024-06-14 11:58:51,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 362 transitions, 4536 flow [2024-06-14 11:58:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:58:51,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 11:58:51,883 INFO L175 Difference]: Start difference. First operand has 309 places, 347 transitions, 3836 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:58:51,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 362 transitions, 4536 flow [2024-06-14 11:58:54,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 362 transitions, 4476 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:54,118 INFO L231 Difference]: Finished difference. Result has 311 places, 349 transitions, 3887 flow [2024-06-14 11:58:54,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3887, PETRI_PLACES=311, PETRI_TRANSITIONS=349} [2024-06-14 11:58:54,118 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 11:58:54,118 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 349 transitions, 3887 flow [2024-06-14 11:58:54,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 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 11:58:54,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:54,119 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 11:58:54,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:58:54,119 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 11:58:54,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash -675568666, now seen corresponding path program 1 times [2024-06-14 11:58:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746932820] [2024-06-14 11:58:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746932820] [2024-06-14 11:58:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746932820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:55,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:55,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524667008] [2024-06-14 11:58:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:55,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:55,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:55,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 349 transitions, 3887 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 11:58:55,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:55,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:55,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:56,585 INFO L124 PetriNetUnfolderBase]: 3696/6071 cut-off events. [2024-06-14 11:58:56,586 INFO L125 PetriNetUnfolderBase]: For 1261451/1261451 co-relation queries the response was YES. [2024-06-14 11:58:56,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58195 conditions, 6071 events. 3696/6071 cut-off events. For 1261451/1261451 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39219 event pairs, 866 based on Foata normal form. 1/5997 useless extension candidates. Maximal degree in co-relation 58043. Up to 5552 conditions per place. [2024-06-14 11:58:56,671 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 324 selfloop transitions, 17 changer transitions 0/378 dead transitions. [2024-06-14 11:58:56,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 378 transitions, 4729 flow [2024-06-14 11:58:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:58:56,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:58:56,673 INFO L175 Difference]: Start difference. First operand has 311 places, 349 transitions, 3887 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:58:56,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 378 transitions, 4729 flow [2024-06-14 11:58:58,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 378 transitions, 4634 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:58,892 INFO L231 Difference]: Finished difference. Result has 313 places, 352 transitions, 3932 flow [2024-06-14 11:58:58,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3932, PETRI_PLACES=313, PETRI_TRANSITIONS=352} [2024-06-14 11:58:58,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-14 11:58:58,892 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 352 transitions, 3932 flow [2024-06-14 11:58:58,892 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 11:58:58,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:58,893 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 11:58:58,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:58:58,893 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 11:58:58,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -667950106, now seen corresponding path program 2 times [2024-06-14 11:58:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:58,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387332926] [2024-06-14 11:58:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:58,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:59,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387332926] [2024-06-14 11:58:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387332926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:59,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:59,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226960006] [2024-06-14 11:58:59,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:59,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:59,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:59,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:59,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:59,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:58:59,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 352 transitions, 3932 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 11:58:59,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:59,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:58:59,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:01,265 INFO L124 PetriNetUnfolderBase]: 3706/6087 cut-off events. [2024-06-14 11:59:01,265 INFO L125 PetriNetUnfolderBase]: For 1283894/1283894 co-relation queries the response was YES. [2024-06-14 11:59:01,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58820 conditions, 6087 events. 3706/6087 cut-off events. For 1283894/1283894 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39340 event pairs, 866 based on Foata normal form. 1/6013 useless extension candidates. Maximal degree in co-relation 58667. Up to 5560 conditions per place. [2024-06-14 11:59:01,361 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 325 selfloop transitions, 23 changer transitions 0/385 dead transitions. [2024-06-14 11:59:01,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 385 transitions, 4819 flow [2024-06-14 11:59:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:59:01,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:59:01,362 INFO L175 Difference]: Start difference. First operand has 313 places, 352 transitions, 3932 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:59:01,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 385 transitions, 4819 flow [2024-06-14 11:59:03,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 385 transitions, 4701 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:03,293 INFO L231 Difference]: Finished difference. Result has 317 places, 358 transitions, 4009 flow [2024-06-14 11:59:03,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4009, PETRI_PLACES=317, PETRI_TRANSITIONS=358} [2024-06-14 11:59:03,294 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-14 11:59:03,294 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 358 transitions, 4009 flow [2024-06-14 11:59:03,294 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 11:59:03,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:03,294 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 11:59:03,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:59:03,295 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 11:59:03,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2045476508, now seen corresponding path program 1 times [2024-06-14 11:59:03,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:03,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534998066] [2024-06-14 11:59:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:03,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:04,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534998066] [2024-06-14 11:59:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534998066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:04,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:04,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645285854] [2024-06-14 11:59:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:04,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 358 transitions, 4009 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 11:59:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:05,555 INFO L124 PetriNetUnfolderBase]: 3714/6099 cut-off events. [2024-06-14 11:59:05,555 INFO L125 PetriNetUnfolderBase]: For 1316023/1316023 co-relation queries the response was YES. [2024-06-14 11:59:05,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59504 conditions, 6099 events. 3714/6099 cut-off events. For 1316023/1316023 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39367 event pairs, 714 based on Foata normal form. 2/6056 useless extension candidates. Maximal degree in co-relation 59349. Up to 5552 conditions per place. [2024-06-14 11:59:05,641 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 336 selfloop transitions, 15 changer transitions 0/388 dead transitions. [2024-06-14 11:59:05,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 388 transitions, 4847 flow [2024-06-14 11:59:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:59:05,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:59:05,642 INFO L175 Difference]: Start difference. First operand has 317 places, 358 transitions, 4009 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:59:05,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 388 transitions, 4847 flow [2024-06-14 11:59:07,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 388 transitions, 4715 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:07,768 INFO L231 Difference]: Finished difference. Result has 319 places, 360 transitions, 3982 flow [2024-06-14 11:59:07,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3982, PETRI_PLACES=319, PETRI_TRANSITIONS=360} [2024-06-14 11:59:07,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 11:59:07,769 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 360 transitions, 3982 flow [2024-06-14 11:59:07,769 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 11:59:07,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:07,769 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 11:59:07,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:59:07,769 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 11:59:07,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2055952028, now seen corresponding path program 2 times [2024-06-14 11:59:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:07,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729836886] [2024-06-14 11:59:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:07,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729836886] [2024-06-14 11:59:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729836886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:08,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:08,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:08,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387710594] [2024-06-14 11:59:08,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:08,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:08,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:08,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 360 transitions, 3982 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 11:59:08,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:08,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:08,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:10,112 INFO L124 PetriNetUnfolderBase]: 3722/6111 cut-off events. [2024-06-14 11:59:10,113 INFO L125 PetriNetUnfolderBase]: For 1337225/1337225 co-relation queries the response was YES. [2024-06-14 11:59:10,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59898 conditions, 6111 events. 3722/6111 cut-off events. For 1337225/1337225 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39502 event pairs, 864 based on Foata normal form. 2/6038 useless extension candidates. Maximal degree in co-relation 59742. Up to 5593 conditions per place. [2024-06-14 11:59:10,210 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 333 selfloop transitions, 16 changer transitions 0/386 dead transitions. [2024-06-14 11:59:10,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 386 transitions, 4810 flow [2024-06-14 11:59:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:59:10,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:59:10,211 INFO L175 Difference]: Start difference. First operand has 319 places, 360 transitions, 3982 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:59:10,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 386 transitions, 4810 flow [2024-06-14 11:59:12,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 386 transitions, 4721 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:12,821 INFO L231 Difference]: Finished difference. Result has 321 places, 362 transitions, 4004 flow [2024-06-14 11:59:12,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4004, PETRI_PLACES=321, PETRI_TRANSITIONS=362} [2024-06-14 11:59:12,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-14 11:59:12,822 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 362 transitions, 4004 flow [2024-06-14 11:59:12,822 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 11:59:12,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:12,822 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 11:59:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:59:12,822 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 11:59:12,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2131339682, now seen corresponding path program 3 times [2024-06-14 11:59:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858233182] [2024-06-14 11:59:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858233182] [2024-06-14 11:59:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858233182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:13,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100925468] [2024-06-14 11:59:13,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:13,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:13,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:13,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 362 transitions, 4004 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 11:59:13,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:13,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:13,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:15,138 INFO L124 PetriNetUnfolderBase]: 3727/6121 cut-off events. [2024-06-14 11:59:15,138 INFO L125 PetriNetUnfolderBase]: For 1355286/1355289 co-relation queries the response was YES. [2024-06-14 11:59:15,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60229 conditions, 6121 events. 3727/6121 cut-off events. For 1355286/1355289 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39628 event pairs, 868 based on Foata normal form. 3/6048 useless extension candidates. Maximal degree in co-relation 60072. Up to 5552 conditions per place. [2024-06-14 11:59:15,233 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 322 selfloop transitions, 29 changer transitions 0/388 dead transitions. [2024-06-14 11:59:15,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 388 transitions, 4874 flow [2024-06-14 11:59:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:59:15,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:59:15,238 INFO L175 Difference]: Start difference. First operand has 321 places, 362 transitions, 4004 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:59:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 388 transitions, 4874 flow [2024-06-14 11:59:17,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 388 transitions, 4775 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:17,321 INFO L231 Difference]: Finished difference. Result has 323 places, 365 transitions, 4085 flow [2024-06-14 11:59:17,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3905, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4085, PETRI_PLACES=323, PETRI_TRANSITIONS=365} [2024-06-14 11:59:17,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-14 11:59:17,322 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 365 transitions, 4085 flow [2024-06-14 11:59:17,322 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 11:59:17,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:17,322 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 11:59:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:59:17,323 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 11:59:17,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2131160936, now seen corresponding path program 1 times [2024-06-14 11:59:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:17,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501309265] [2024-06-14 11:59:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:18,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501309265] [2024-06-14 11:59:18,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501309265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:18,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:18,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:18,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192803644] [2024-06-14 11:59:18,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:18,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:18,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:18,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:18,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 365 transitions, 4085 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 11:59:18,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:18,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:18,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:19,662 INFO L124 PetriNetUnfolderBase]: 3934/6390 cut-off events. [2024-06-14 11:59:19,663 INFO L125 PetriNetUnfolderBase]: For 1381443/1381446 co-relation queries the response was YES. [2024-06-14 11:59:19,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62032 conditions, 6390 events. 3934/6390 cut-off events. For 1381443/1381446 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40625 event pairs, 921 based on Foata normal form. 1/6387 useless extension candidates. Maximal degree in co-relation 61874. Up to 6007 conditions per place. [2024-06-14 11:59:19,758 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 357 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-14 11:59:19,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 391 transitions, 5009 flow [2024-06-14 11:59:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:59:19,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:59:19,759 INFO L175 Difference]: Start difference. First operand has 323 places, 365 transitions, 4085 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:59:19,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 391 transitions, 5009 flow [2024-06-14 11:59:22,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 391 transitions, 4851 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:22,272 INFO L231 Difference]: Finished difference. Result has 325 places, 368 transitions, 4091 flow [2024-06-14 11:59:22,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4091, PETRI_PLACES=325, PETRI_TRANSITIONS=368} [2024-06-14 11:59:22,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 11:59:22,273 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 368 transitions, 4091 flow [2024-06-14 11:59:22,273 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 11:59:22,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:22,274 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 11:59:22,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:59:22,274 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 11:59:22,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:22,274 INFO L85 PathProgramCache]: Analyzing trace with hash 282526622, now seen corresponding path program 4 times [2024-06-14 11:59:22,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704577545] [2024-06-14 11:59:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:22,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704577545] [2024-06-14 11:59:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704577545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:23,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:23,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:23,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340195003] [2024-06-14 11:59:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:23,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:23,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:23,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:23,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 368 transitions, 4091 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 11:59:23,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:23,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:23,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:24,645 INFO L124 PetriNetUnfolderBase]: 3737/6137 cut-off events. [2024-06-14 11:59:24,645 INFO L125 PetriNetUnfolderBase]: For 1402214/1402217 co-relation queries the response was YES. [2024-06-14 11:59:24,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61337 conditions, 6137 events. 3737/6137 cut-off events. For 1402214/1402217 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39777 event pairs, 867 based on Foata normal form. 3/6064 useless extension candidates. Maximal degree in co-relation 61178. Up to 5555 conditions per place. [2024-06-14 11:59:24,735 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 316 selfloop transitions, 37 changer transitions 0/391 dead transitions. [2024-06-14 11:59:24,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 391 transitions, 4965 flow [2024-06-14 11:59:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:59:24,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:59:24,744 INFO L175 Difference]: Start difference. First operand has 325 places, 368 transitions, 4091 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:59:24,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 391 transitions, 4965 flow [2024-06-14 11:59:27,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 391 transitions, 4823 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:27,388 INFO L231 Difference]: Finished difference. Result has 327 places, 371 transitions, 4153 flow [2024-06-14 11:59:27,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3949, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4153, PETRI_PLACES=327, PETRI_TRANSITIONS=371} [2024-06-14 11:59:27,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-14 11:59:27,388 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 371 transitions, 4153 flow [2024-06-14 11:59:27,388 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 11:59:27,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:27,389 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 11:59:27,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:59:27,389 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 11:59:27,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash -559919260, now seen corresponding path program 2 times [2024-06-14 11:59:27,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:27,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237678759] [2024-06-14 11:59:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:28,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237678759] [2024-06-14 11:59:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237678759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:28,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:28,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348403546] [2024-06-14 11:59:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:28,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:28,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:28,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 371 transitions, 4153 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 11:59:28,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:28,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:28,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:29,856 INFO L124 PetriNetUnfolderBase]: 3944/6406 cut-off events. [2024-06-14 11:59:29,856 INFO L125 PetriNetUnfolderBase]: For 1432496/1432499 co-relation queries the response was YES. [2024-06-14 11:59:29,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63186 conditions, 6406 events. 3944/6406 cut-off events. For 1432496/1432499 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40758 event pairs, 921 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 63026. Up to 6015 conditions per place. [2024-06-14 11:59:29,948 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 355 selfloop transitions, 34 changer transitions 0/394 dead transitions. [2024-06-14 11:59:29,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 394 transitions, 5083 flow [2024-06-14 11:59:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:59:29,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 11:59:29,966 INFO L175 Difference]: Start difference. First operand has 327 places, 371 transitions, 4153 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:59:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 394 transitions, 5083 flow [2024-06-14 11:59:32,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 394 transitions, 4901 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:32,398 INFO L231 Difference]: Finished difference. Result has 329 places, 374 transitions, 4153 flow [2024-06-14 11:59:32,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4153, PETRI_PLACES=329, PETRI_TRANSITIONS=374} [2024-06-14 11:59:32,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 11:59:32,398 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 374 transitions, 4153 flow [2024-06-14 11:59:32,399 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 11:59:32,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:32,399 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 11:59:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:59:32,399 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 11:59:32,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash -559919012, now seen corresponding path program 1 times [2024-06-14 11:59:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:32,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138720764] [2024-06-14 11:59:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138720764] [2024-06-14 11:59:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138720764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:33,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:33,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190903157] [2024-06-14 11:59:33,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:33,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:33,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 374 transitions, 4153 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 11:59:33,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:33,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:33,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:34,881 INFO L124 PetriNetUnfolderBase]: 3747/6151 cut-off events. [2024-06-14 11:59:34,881 INFO L125 PetriNetUnfolderBase]: For 1452917/1452920 co-relation queries the response was YES. [2024-06-14 11:59:34,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62404 conditions, 6151 events. 3747/6151 cut-off events. For 1452917/1452920 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39830 event pairs, 866 based on Foata normal form. 3/6078 useless extension candidates. Maximal degree in co-relation 62243. Up to 5615 conditions per place. [2024-06-14 11:59:34,976 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 336 selfloop transitions, 22 changer transitions 0/397 dead transitions. [2024-06-14 11:59:34,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 397 transitions, 4991 flow [2024-06-14 11:59:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:59:34,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:59:34,977 INFO L175 Difference]: Start difference. First operand has 329 places, 374 transitions, 4153 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:59:34,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 397 transitions, 4991 flow [2024-06-14 11:59:37,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 397 transitions, 4831 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:37,320 INFO L231 Difference]: Finished difference. Result has 331 places, 377 transitions, 4121 flow [2024-06-14 11:59:37,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4121, PETRI_PLACES=331, PETRI_TRANSITIONS=377} [2024-06-14 11:59:37,321 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-14 11:59:37,321 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 377 transitions, 4121 flow [2024-06-14 11:59:37,321 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 11:59:37,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:37,321 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 11:59:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:59:37,321 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:37,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash -323446982, now seen corresponding path program 2 times [2024-06-14 11:59:37,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:37,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667650917] [2024-06-14 11:59:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:38,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:38,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667650917] [2024-06-14 11:59:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667650917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:38,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:38,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461299063] [2024-06-14 11:59:38,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:38,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:38,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:38,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 377 transitions, 4121 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 11:59:38,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:38,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:38,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:39,884 INFO L124 PetriNetUnfolderBase]: 3760/6169 cut-off events. [2024-06-14 11:59:39,884 INFO L125 PetriNetUnfolderBase]: For 1481915/1481918 co-relation queries the response was YES. [2024-06-14 11:59:39,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63128 conditions, 6169 events. 3760/6169 cut-off events. For 1481915/1481918 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39922 event pairs, 866 based on Foata normal form. 3/6096 useless extension candidates. Maximal degree in co-relation 62966. Up to 5612 conditions per place. [2024-06-14 11:59:39,986 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 327 selfloop transitions, 37 changer transitions 0/403 dead transitions. [2024-06-14 11:59:39,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 403 transitions, 5303 flow [2024-06-14 11:59:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:59:39,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:59:39,988 INFO L175 Difference]: Start difference. First operand has 331 places, 377 transitions, 4121 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:59:39,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 403 transitions, 5303 flow [2024-06-14 11:59:42,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 403 transitions, 5197 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:59:42,825 INFO L231 Difference]: Finished difference. Result has 334 places, 385 transitions, 4287 flow [2024-06-14 11:59:42,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4287, PETRI_PLACES=334, PETRI_TRANSITIONS=385} [2024-06-14 11:59:42,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 11:59:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 385 transitions, 4287 flow [2024-06-14 11:59:42,826 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 11:59:42,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:42,826 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 11:59:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:59:42,826 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:42,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -323744086, now seen corresponding path program 5 times [2024-06-14 11:59:42,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:42,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413099435] [2024-06-14 11:59:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:42,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413099435] [2024-06-14 11:59:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413099435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:43,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:43,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:43,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786449460] [2024-06-14 11:59:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:43,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:43,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:43,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 385 transitions, 4287 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 11:59:43,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:43,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:43,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:45,392 INFO L124 PetriNetUnfolderBase]: 3781/6200 cut-off events. [2024-06-14 11:59:45,392 INFO L125 PetriNetUnfolderBase]: For 1525832/1525835 co-relation queries the response was YES. [2024-06-14 11:59:45,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64440 conditions, 6200 events. 3781/6200 cut-off events. For 1525832/1525835 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40168 event pairs, 866 based on Foata normal form. 3/6127 useless extension candidates. Maximal degree in co-relation 64276. Up to 5583 conditions per place. [2024-06-14 11:59:45,495 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 315 selfloop transitions, 59 changer transitions 0/413 dead transitions. [2024-06-14 11:59:45,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 413 transitions, 5955 flow [2024-06-14 11:59:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:59:45,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:59:45,496 INFO L175 Difference]: Start difference. First operand has 334 places, 385 transitions, 4287 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:59:45,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 413 transitions, 5955 flow [2024-06-14 11:59:48,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 413 transitions, 5831 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:48,667 INFO L231 Difference]: Finished difference. Result has 338 places, 394 transitions, 4683 flow [2024-06-14 11:59:48,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4683, PETRI_PLACES=338, PETRI_TRANSITIONS=394} [2024-06-14 11:59:48,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 11:59:48,668 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 394 transitions, 4683 flow [2024-06-14 11:59:48,668 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 11:59:48,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:48,668 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 11:59:48,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:59:48,668 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:48,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -323864056, now seen corresponding path program 6 times [2024-06-14 11:59:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:48,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015338396] [2024-06-14 11:59:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015338396] [2024-06-14 11:59:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015338396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898814372] [2024-06-14 11:59:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:49,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 11:59:49,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 394 transitions, 4683 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 11:59:49,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:49,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 11:59:49,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:51,362 INFO L124 PetriNetUnfolderBase]: 3778/6195 cut-off events. [2024-06-14 11:59:51,363 INFO L125 PetriNetUnfolderBase]: For 1547432/1547432 co-relation queries the response was YES. [2024-06-14 11:59:51,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64870 conditions, 6195 events. 3778/6195 cut-off events. For 1547432/1547432 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40137 event pairs, 862 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 64704. Up to 5664 conditions per place. [2024-06-14 11:59:51,461 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 22 changer transitions 0/411 dead transitions. [2024-06-14 11:59:51,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 411 transitions, 5469 flow [2024-06-14 11:59:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:59:51,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 11:59:51,463 INFO L175 Difference]: Start difference. First operand has 338 places, 394 transitions, 4683 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:59:51,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 411 transitions, 5469 flow [2024-06-14 11:59:55,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 411 transitions, 5193 flow, removed 125 selfloop flow, removed 3 redundant places. [2024-06-14 11:59:55,029 INFO L231 Difference]: Finished difference. Result has 343 places, 394 transitions, 4457 flow [2024-06-14 11:59:55,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4457, PETRI_PLACES=343, PETRI_TRANSITIONS=394} [2024-06-14 11:59:55,030 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 11:59:55,030 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 394 transitions, 4457 flow [2024-06-14 11:59:55,030 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 11:59:55,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:55,030 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 11:59:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:59:55,031 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:55,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1894806086, now seen corresponding path program 3 times [2024-06-14 11:59:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108075739] [2024-06-14 11:59:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:55,994 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 11:59:55,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:55,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108075739] [2024-06-14 11:59:55,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108075739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:55,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:55,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122158075] [2024-06-14 11:59:55,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:55,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:55,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:56,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:59:56,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 394 transitions, 4457 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 11:59:56,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:56,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:59:56,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:57,584 INFO L124 PetriNetUnfolderBase]: 3993/6476 cut-off events. [2024-06-14 11:59:57,585 INFO L125 PetriNetUnfolderBase]: For 1580458/1580461 co-relation queries the response was YES. [2024-06-14 11:59:57,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66544 conditions, 6476 events. 3993/6476 cut-off events. For 1580458/1580461 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 41256 event pairs, 920 based on Foata normal form. 1/6473 useless extension candidates. Maximal degree in co-relation 66376. Up to 6063 conditions per place. [2024-06-14 11:59:57,689 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 367 selfloop transitions, 46 changer transitions 0/418 dead transitions. [2024-06-14 11:59:57,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 418 transitions, 5801 flow [2024-06-14 11:59:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:59:57,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 11:59:57,690 INFO L175 Difference]: Start difference. First operand has 343 places, 394 transitions, 4457 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:59:57,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 418 transitions, 5801 flow [2024-06-14 12:00:01,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 418 transitions, 5705 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:01,031 INFO L231 Difference]: Finished difference. Result has 343 places, 400 transitions, 4693 flow [2024-06-14 12:00:01,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4693, PETRI_PLACES=343, PETRI_TRANSITIONS=400} [2024-06-14 12:00:01,031 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 12:00:01,031 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 400 transitions, 4693 flow [2024-06-14 12:00:01,032 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 12:00:01,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:01,032 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 12:00:01,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:00:01,032 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:01,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash -323743652, now seen corresponding path program 3 times [2024-06-14 12:00:01,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:01,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295376346] [2024-06-14 12:00:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:01,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:02,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:02,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295376346] [2024-06-14 12:00:02,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295376346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:02,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:02,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927014320] [2024-06-14 12:00:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:02,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:02,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:02,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:02,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 400 transitions, 4693 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 12:00:02,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:02,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:02,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:03,724 INFO L124 PetriNetUnfolderBase]: 3796/6221 cut-off events. [2024-06-14 12:00:03,724 INFO L125 PetriNetUnfolderBase]: For 1605724/1605727 co-relation queries the response was YES. [2024-06-14 12:00:03,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65864 conditions, 6221 events. 3796/6221 cut-off events. For 1605724/1605727 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40319 event pairs, 866 based on Foata normal form. 3/6148 useless extension candidates. Maximal degree in co-relation 65697. Up to 5669 conditions per place. [2024-06-14 12:00:03,808 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 30 changer transitions 0/420 dead transitions. [2024-06-14 12:00:03,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 420 transitions, 5560 flow [2024-06-14 12:00:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:00:03,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:00:03,810 INFO L175 Difference]: Start difference. First operand has 343 places, 400 transitions, 4693 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:00:03,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 420 transitions, 5560 flow [2024-06-14 12:00:06,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 420 transitions, 5400 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:06,715 INFO L231 Difference]: Finished difference. Result has 347 places, 403 transitions, 4672 flow [2024-06-14 12:00:06,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4672, PETRI_PLACES=347, PETRI_TRANSITIONS=403} [2024-06-14 12:00:06,716 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-14 12:00:06,716 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 403 transitions, 4672 flow [2024-06-14 12:00:06,716 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 12:00:06,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:06,716 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 12:00:06,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:00:06,717 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 12:00:06,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash 188945552, now seen corresponding path program 1 times [2024-06-14 12:00:06,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:06,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571634465] [2024-06-14 12:00:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:06,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:08,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571634465] [2024-06-14 12:00:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571634465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:08,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:08,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:00:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342884812] [2024-06-14 12:00:08,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:08,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:00:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:00:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:00:08,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:08,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 403 transitions, 4672 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 12:00:08,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:08,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:11,036 INFO L124 PetriNetUnfolderBase]: 4203/6858 cut-off events. [2024-06-14 12:00:11,036 INFO L125 PetriNetUnfolderBase]: For 1697370/1697373 co-relation queries the response was YES. [2024-06-14 12:00:11,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69555 conditions, 6858 events. 4203/6858 cut-off events. For 1697370/1697373 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44566 event pairs, 886 based on Foata normal form. 12/6866 useless extension candidates. Maximal degree in co-relation 69386. Up to 5599 conditions per place. [2024-06-14 12:00:11,198 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 349 selfloop transitions, 109 changer transitions 0/463 dead transitions. [2024-06-14 12:00:11,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 463 transitions, 6030 flow [2024-06-14 12:00:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:00:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:00:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 12:00:11,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:00:11,200 INFO L175 Difference]: Start difference. First operand has 347 places, 403 transitions, 4672 flow. Second operand 11 states and 220 transitions. [2024-06-14 12:00:11,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 463 transitions, 6030 flow [2024-06-14 12:00:16,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 463 transitions, 5922 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:16,013 INFO L231 Difference]: Finished difference. Result has 354 places, 417 transitions, 5062 flow [2024-06-14 12:00:16,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5062, PETRI_PLACES=354, PETRI_TRANSITIONS=417} [2024-06-14 12:00:16,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-14 12:00:16,014 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 417 transitions, 5062 flow [2024-06-14 12:00:16,014 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 12:00:16,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:16,014 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 12:00:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:00:16,014 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 12:00:16,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1894929218, now seen corresponding path program 3 times [2024-06-14 12:00:16,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:16,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297929716] [2024-06-14 12:00:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:16,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297929716] [2024-06-14 12:00:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297929716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:17,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4178372] [2024-06-14 12:00:17,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:17,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:17,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:17,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 417 transitions, 5062 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 12:00:17,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:17,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:17,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:18,998 INFO L124 PetriNetUnfolderBase]: 4009/6637 cut-off events. [2024-06-14 12:00:18,998 INFO L125 PetriNetUnfolderBase]: For 1678776/1678776 co-relation queries the response was YES. [2024-06-14 12:00:19,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69644 conditions, 6637 events. 4009/6637 cut-off events. For 1678776/1678776 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44099 event pairs, 899 based on Foata normal form. 2/6564 useless extension candidates. Maximal degree in co-relation 69472. Up to 6048 conditions per place. [2024-06-14 12:00:19,117 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 375 selfloop transitions, 21 changer transitions 0/437 dead transitions. [2024-06-14 12:00:19,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 437 transitions, 5984 flow [2024-06-14 12:00:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:00:19,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:00:19,119 INFO L175 Difference]: Start difference. First operand has 354 places, 417 transitions, 5062 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:00:19,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 437 transitions, 5984 flow [2024-06-14 12:00:22,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 437 transitions, 5756 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:22,577 INFO L231 Difference]: Finished difference. Result has 356 places, 419 transitions, 4971 flow [2024-06-14 12:00:22,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4971, PETRI_PLACES=356, PETRI_TRANSITIONS=419} [2024-06-14 12:00:22,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-14 12:00:22,578 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 419 transitions, 4971 flow [2024-06-14 12:00:22,578 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 12:00:22,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:22,578 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 12:00:22,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:00:22,578 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 12:00:22,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1649253454, now seen corresponding path program 1 times [2024-06-14 12:00:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:22,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752170277] [2024-06-14 12:00:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:22,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:24,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752170277] [2024-06-14 12:00:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752170277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:24,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:24,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585277139] [2024-06-14 12:00:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:24,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:24,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:24,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:00:24,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 419 transitions, 4971 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 12:00:24,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:24,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:00:24,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:26,277 INFO L124 PetriNetUnfolderBase]: 3818/6410 cut-off events. [2024-06-14 12:00:26,278 INFO L125 PetriNetUnfolderBase]: For 1676494/1676498 co-relation queries the response was YES. [2024-06-14 12:00:26,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67219 conditions, 6410 events. 3818/6410 cut-off events. For 1676494/1676498 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43321 event pairs, 871 based on Foata normal form. 2/6321 useless extension candidates. Maximal degree in co-relation 67046. Up to 5632 conditions per place. [2024-06-14 12:00:26,398 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 329 selfloop transitions, 29 changer transitions 0/437 dead transitions. [2024-06-14 12:00:26,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 437 transitions, 5731 flow [2024-06-14 12:00:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:00:26,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 12:00:26,400 INFO L175 Difference]: Start difference. First operand has 356 places, 419 transitions, 4971 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:00:26,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 437 transitions, 5731 flow [2024-06-14 12:00:30,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 437 transitions, 5582 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:30,206 INFO L231 Difference]: Finished difference. Result has 359 places, 419 transitions, 4886 flow [2024-06-14 12:00:30,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=359, PETRI_TRANSITIONS=419} [2024-06-14 12:00:30,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-14 12:00:30,207 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 419 transitions, 4886 flow [2024-06-14 12:00:30,207 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 12:00:30,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:30,208 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 12:00:30,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:00:30,208 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 12:00:30,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash -199571528, now seen corresponding path program 7 times [2024-06-14 12:00:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:30,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757631919] [2024-06-14 12:00:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757631919] [2024-06-14 12:00:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757631919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140202921] [2024-06-14 12:00:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:31,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:00:31,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 419 transitions, 4886 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 12:00:31,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:31,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:00:31,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:32,957 INFO L124 PetriNetUnfolderBase]: 4008/6627 cut-off events. [2024-06-14 12:00:32,957 INFO L125 PetriNetUnfolderBase]: For 1694946/1694949 co-relation queries the response was YES. [2024-06-14 12:00:33,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69094 conditions, 6627 events. 4008/6627 cut-off events. For 1694946/1694949 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43932 event pairs, 901 based on Foata normal form. 1/6549 useless extension candidates. Maximal degree in co-relation 68920. Up to 6005 conditions per place. [2024-06-14 12:00:33,065 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 372 selfloop transitions, 29 changer transitions 0/442 dead transitions. [2024-06-14 12:00:33,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 442 transitions, 5860 flow [2024-06-14 12:00:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:00:33,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:00:33,067 INFO L175 Difference]: Start difference. First operand has 359 places, 419 transitions, 4886 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:00:33,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 442 transitions, 5860 flow [2024-06-14 12:00:36,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 442 transitions, 5758 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:00:36,252 INFO L231 Difference]: Finished difference. Result has 359 places, 422 transitions, 4976 flow [2024-06-14 12:00:36,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4976, PETRI_PLACES=359, PETRI_TRANSITIONS=422} [2024-06-14 12:00:36,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-14 12:00:36,253 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 422 transitions, 4976 flow [2024-06-14 12:00:36,253 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 12:00:36,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:36,253 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 12:00:36,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:00:36,253 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 12:00:36,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -394459616, now seen corresponding path program 4 times [2024-06-14 12:00:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456813327] [2024-06-14 12:00:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:37,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:37,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456813327] [2024-06-14 12:00:37,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456813327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:37,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:37,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899095682] [2024-06-14 12:00:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:37,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:37,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:37,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 422 transitions, 4976 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 12:00:37,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:37,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:39,814 INFO L124 PetriNetUnfolderBase]: 4215/6899 cut-off events. [2024-06-14 12:00:39,814 INFO L125 PetriNetUnfolderBase]: For 1723830/1723836 co-relation queries the response was YES. [2024-06-14 12:00:39,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70664 conditions, 6899 events. 4215/6899 cut-off events. For 1723830/1723836 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45045 event pairs, 944 based on Foata normal form. 5/6899 useless extension candidates. Maximal degree in co-relation 70489. Up to 6469 conditions per place. [2024-06-14 12:00:39,977 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 411 selfloop transitions, 29 changer transitions 0/445 dead transitions. [2024-06-14 12:00:39,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 445 transitions, 6006 flow [2024-06-14 12:00:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:00:39,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 12:00:39,979 INFO L175 Difference]: Start difference. First operand has 359 places, 422 transitions, 4976 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:00:39,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 445 transitions, 6006 flow [2024-06-14 12:00:46,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 445 transitions, 5842 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:46,189 INFO L231 Difference]: Finished difference. Result has 361 places, 425 transitions, 4982 flow [2024-06-14 12:00:46,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4982, PETRI_PLACES=361, PETRI_TRANSITIONS=425} [2024-06-14 12:00:46,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 12:00:46,190 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 425 transitions, 4982 flow [2024-06-14 12:00:46,190 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 12:00:46,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:46,190 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 12:00:46,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:00:46,190 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 12:00:46,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 816406390, now seen corresponding path program 5 times [2024-06-14 12:00:46,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:46,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374196820] [2024-06-14 12:00:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:46,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374196820] [2024-06-14 12:00:47,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374196820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:47,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:47,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:47,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924553869] [2024-06-14 12:00:47,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:47,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:47,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 425 transitions, 4982 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 12:00:47,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:47,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:47,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:49,773 INFO L124 PetriNetUnfolderBase]: 4220/6906 cut-off events. [2024-06-14 12:00:49,774 INFO L125 PetriNetUnfolderBase]: For 1748642/1748648 co-relation queries the response was YES. [2024-06-14 12:00:49,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70884 conditions, 6906 events. 4220/6906 cut-off events. For 1748642/1748648 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45093 event pairs, 944 based on Foata normal form. 5/6906 useless extension candidates. Maximal degree in co-relation 70708. Up to 6476 conditions per place. [2024-06-14 12:00:49,929 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 30 changer transitions 0/448 dead transitions. [2024-06-14 12:00:49,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 448 transitions, 6024 flow [2024-06-14 12:00:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:00:49,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:00:49,930 INFO L175 Difference]: Start difference. First operand has 361 places, 425 transitions, 4982 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:00:49,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 448 transitions, 6024 flow [2024-06-14 12:00:54,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 448 transitions, 5882 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:54,393 INFO L231 Difference]: Finished difference. Result has 363 places, 428 transitions, 5018 flow [2024-06-14 12:00:54,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5018, PETRI_PLACES=363, PETRI_TRANSITIONS=428} [2024-06-14 12:00:54,394 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-14 12:00:54,394 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 428 transitions, 5018 flow [2024-06-14 12:00:54,394 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 12:00:54,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:54,394 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 12:00:54,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:00:54,394 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 12:00:54,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash 816794200, now seen corresponding path program 6 times [2024-06-14 12:00:54,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:54,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143516672] [2024-06-14 12:00:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:54,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:55,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:55,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143516672] [2024-06-14 12:00:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143516672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:55,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:00:55,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225332609] [2024-06-14 12:00:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:55,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:00:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:00:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:00:55,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:00:55,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 428 transitions, 5018 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 12:00:55,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:55,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:00:55,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:57,408 INFO L124 PetriNetUnfolderBase]: 4225/6913 cut-off events. [2024-06-14 12:00:57,408 INFO L125 PetriNetUnfolderBase]: For 1774279/1774285 co-relation queries the response was YES. [2024-06-14 12:00:57,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71147 conditions, 6913 events. 4225/6913 cut-off events. For 1774279/1774285 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45076 event pairs, 944 based on Foata normal form. 5/6913 useless extension candidates. Maximal degree in co-relation 70970. Up to 6471 conditions per place. [2024-06-14 12:00:57,521 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 402 selfloop transitions, 41 changer transitions 0/448 dead transitions. [2024-06-14 12:00:57,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 448 transitions, 6068 flow [2024-06-14 12:00:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:00:57,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:00:57,522 INFO L175 Difference]: Start difference. First operand has 363 places, 428 transitions, 5018 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:00:57,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 448 transitions, 6068 flow [2024-06-14 12:01:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 448 transitions, 5918 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:02,427 INFO L231 Difference]: Finished difference. Result has 365 places, 431 transitions, 5084 flow [2024-06-14 12:01:02,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4868, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5084, PETRI_PLACES=365, PETRI_TRANSITIONS=431} [2024-06-14 12:01:02,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-14 12:01:02,428 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 431 transitions, 5084 flow [2024-06-14 12:01:02,429 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 12:01:02,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:02,429 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 12:01:02,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:01:02,429 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 12:01:02,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash -394280126, now seen corresponding path program 7 times [2024-06-14 12:01:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716335258] [2024-06-14 12:01:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:02,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:03,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:03,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716335258] [2024-06-14 12:01:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716335258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:03,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839953698] [2024-06-14 12:01:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:03,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 431 transitions, 5084 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 12:01:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:05,449 INFO L124 PetriNetUnfolderBase]: 4222/6909 cut-off events. [2024-06-14 12:01:05,449 INFO L125 PetriNetUnfolderBase]: For 1791293/1791299 co-relation queries the response was YES. [2024-06-14 12:01:05,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71379 conditions, 6909 events. 4222/6909 cut-off events. For 1791293/1791299 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45102 event pairs, 944 based on Foata normal form. 5/6909 useless extension candidates. Maximal degree in co-relation 71201. Up to 6470 conditions per place. [2024-06-14 12:01:05,546 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 406 selfloop transitions, 37 changer transitions 0/448 dead transitions. [2024-06-14 12:01:05,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 448 transitions, 6012 flow [2024-06-14 12:01:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:01:05,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 12:01:05,548 INFO L175 Difference]: Start difference. First operand has 365 places, 431 transitions, 5084 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:01:05,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 448 transitions, 6012 flow [2024-06-14 12:01:09,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 448 transitions, 5756 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:09,386 INFO L231 Difference]: Finished difference. Result has 367 places, 431 transitions, 4908 flow [2024-06-14 12:01:09,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4908, PETRI_PLACES=367, PETRI_TRANSITIONS=431} [2024-06-14 12:01:09,386 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-14 12:01:09,386 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 431 transitions, 4908 flow [2024-06-14 12:01:09,386 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 12:01:09,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:09,387 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 12:01:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:01:09,387 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 12:01:09,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash -394279878, now seen corresponding path program 4 times [2024-06-14 12:01:09,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:09,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257022346] [2024-06-14 12:01:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:10,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:10,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257022346] [2024-06-14 12:01:10,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257022346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:10,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194918618] [2024-06-14 12:01:10,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:10,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:10,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 431 transitions, 4908 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 12:01:10,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:10,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:10,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:12,135 INFO L124 PetriNetUnfolderBase]: 4017/6643 cut-off events. [2024-06-14 12:01:12,135 INFO L125 PetriNetUnfolderBase]: For 1802711/1802717 co-relation queries the response was YES. [2024-06-14 12:01:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69918 conditions, 6643 events. 4017/6643 cut-off events. For 1802711/1802717 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44068 event pairs, 894 based on Foata normal form. 5/6571 useless extension candidates. Maximal degree in co-relation 69739. Up to 6052 conditions per place. [2024-06-14 12:01:12,257 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 383 selfloop transitions, 22 changer transitions 0/449 dead transitions. [2024-06-14 12:01:12,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 449 transitions, 5783 flow [2024-06-14 12:01:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:01:12,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:01:12,259 INFO L175 Difference]: Start difference. First operand has 367 places, 431 transitions, 4908 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:01:12,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 449 transitions, 5783 flow [2024-06-14 12:01:15,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 449 transitions, 5591 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:15,935 INFO L231 Difference]: Finished difference. Result has 368 places, 432 transitions, 4791 flow [2024-06-14 12:01:15,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4730, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4791, PETRI_PLACES=368, PETRI_TRANSITIONS=432} [2024-06-14 12:01:15,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 12:01:15,936 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 432 transitions, 4791 flow [2024-06-14 12:01:15,937 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 12:01:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:15,937 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 12:01:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:01:15,937 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 12:01:15,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -199213478, now seen corresponding path program 8 times [2024-06-14 12:01:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:15,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292925521] [2024-06-14 12:01:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:17,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:17,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292925521] [2024-06-14 12:01:17,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292925521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:17,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:17,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:17,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725227112] [2024-06-14 12:01:17,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:17,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:17,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:17,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:17,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:17,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:17,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 432 transitions, 4791 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 12:01:17,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:17,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:17,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:19,386 INFO L124 PetriNetUnfolderBase]: 4014/6636 cut-off events. [2024-06-14 12:01:19,387 INFO L125 PetriNetUnfolderBase]: For 1818648/1818651 co-relation queries the response was YES. [2024-06-14 12:01:19,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69768 conditions, 6636 events. 4014/6636 cut-off events. For 1818648/1818651 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43991 event pairs, 901 based on Foata normal form. 1/6558 useless extension candidates. Maximal degree in co-relation 69588. Up to 6003 conditions per place. [2024-06-14 12:01:19,579 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 371 selfloop transitions, 34 changer transitions 0/449 dead transitions. [2024-06-14 12:01:19,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 449 transitions, 5643 flow [2024-06-14 12:01:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:01:19,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:01:19,581 INFO L175 Difference]: Start difference. First operand has 368 places, 432 transitions, 4791 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:01:19,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 449 transitions, 5643 flow [2024-06-14 12:01:25,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 449 transitions, 5511 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:25,331 INFO L231 Difference]: Finished difference. Result has 370 places, 432 transitions, 4733 flow [2024-06-14 12:01:25,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4659, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4733, PETRI_PLACES=370, PETRI_TRANSITIONS=432} [2024-06-14 12:01:25,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-14 12:01:25,332 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 432 transitions, 4733 flow [2024-06-14 12:01:25,332 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 12:01:25,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:25,333 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 12:01:25,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:01:25,333 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 12:01:25,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:25,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1115225000, now seen corresponding path program 8 times [2024-06-14 12:01:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441758577] [2024-06-14 12:01:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:25,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441758577] [2024-06-14 12:01:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441758577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:26,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:26,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630629824] [2024-06-14 12:01:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:26,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:26,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:26,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:26,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 432 transitions, 4733 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 12:01:26,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:26,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:26,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:28,880 INFO L124 PetriNetUnfolderBase]: 4229/6919 cut-off events. [2024-06-14 12:01:28,880 INFO L125 PetriNetUnfolderBase]: For 1858185/1858191 co-relation queries the response was YES. [2024-06-14 12:01:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71700 conditions, 6919 events. 4229/6919 cut-off events. For 1858185/1858191 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45148 event pairs, 944 based on Foata normal form. 5/6919 useless extension candidates. Maximal degree in co-relation 71519. Up to 6449 conditions per place. [2024-06-14 12:01:29,096 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 62 changer transitions 0/453 dead transitions. [2024-06-14 12:01:29,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 453 transitions, 6191 flow [2024-06-14 12:01:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:01:29,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:01:29,098 INFO L175 Difference]: Start difference. First operand has 370 places, 432 transitions, 4733 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:01:29,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 453 transitions, 6191 flow [2024-06-14 12:01:34,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 453 transitions, 6053 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:34,555 INFO L231 Difference]: Finished difference. Result has 371 places, 438 transitions, 4987 flow [2024-06-14 12:01:34,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4987, PETRI_PLACES=371, PETRI_TRANSITIONS=438} [2024-06-14 12:01:34,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-14 12:01:34,556 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 438 transitions, 4987 flow [2024-06-14 12:01:34,556 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 12:01:34,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:34,556 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 12:01:34,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:01:34,556 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 12:01:34,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash 214093402, now seen corresponding path program 9 times [2024-06-14 12:01:34,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:34,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684170432] [2024-06-14 12:01:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:34,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:35,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:35,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684170432] [2024-06-14 12:01:35,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684170432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:35,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:35,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:35,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735402016] [2024-06-14 12:01:35,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:35,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:35,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:35,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 438 transitions, 4987 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 12:01:35,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:35,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:35,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:38,216 INFO L124 PetriNetUnfolderBase]: 4032/6661 cut-off events. [2024-06-14 12:01:38,217 INFO L125 PetriNetUnfolderBase]: For 1886124/1886127 co-relation queries the response was YES. [2024-06-14 12:01:38,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71016 conditions, 6661 events. 4032/6661 cut-off events. For 1886124/1886127 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44117 event pairs, 901 based on Foata normal form. 1/6583 useless extension candidates. Maximal degree in co-relation 70834. Up to 6002 conditions per place. [2024-06-14 12:01:38,322 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 357 selfloop transitions, 52 changer transitions 0/455 dead transitions. [2024-06-14 12:01:38,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 455 transitions, 5983 flow [2024-06-14 12:01:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:01:38,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:01:38,324 INFO L175 Difference]: Start difference. First operand has 371 places, 438 transitions, 4987 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:01:38,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 455 transitions, 5983 flow [2024-06-14 12:01:42,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 455 transitions, 5771 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 12:01:42,232 INFO L231 Difference]: Finished difference. Result has 375 places, 441 transitions, 5035 flow [2024-06-14 12:01:42,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5035, PETRI_PLACES=375, PETRI_TRANSITIONS=441} [2024-06-14 12:01:42,233 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-14 12:01:42,233 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 441 transitions, 5035 flow [2024-06-14 12:01:42,233 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 12:01:42,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:42,233 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 12:01:42,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:01:42,233 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 12:01:42,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:42,234 INFO L85 PathProgramCache]: Analyzing trace with hash 214330738, now seen corresponding path program 9 times [2024-06-14 12:01:42,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:42,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599516398] [2024-06-14 12:01:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:43,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:43,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599516398] [2024-06-14 12:01:43,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599516398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:43,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:43,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968793887] [2024-06-14 12:01:43,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:01:43,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 441 transitions, 5035 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 12:01:43,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:43,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:01:43,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:45,580 INFO L124 PetriNetUnfolderBase]: 4231/6922 cut-off events. [2024-06-14 12:01:45,580 INFO L125 PetriNetUnfolderBase]: For 1908653/1908659 co-relation queries the response was YES. [2024-06-14 12:01:45,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72707 conditions, 6922 events. 4231/6922 cut-off events. For 1908653/1908659 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45212 event pairs, 944 based on Foata normal form. 5/6922 useless extension candidates. Maximal degree in co-relation 72523. Up to 6453 conditions per place. [2024-06-14 12:01:45,756 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 387 selfloop transitions, 63 changer transitions 0/455 dead transitions. [2024-06-14 12:01:45,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 455 transitions, 5969 flow [2024-06-14 12:01:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:01:45,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 12:01:45,758 INFO L175 Difference]: Start difference. First operand has 375 places, 441 transitions, 5035 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:01:45,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 455 transitions, 5969 flow [2024-06-14 12:01:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 455 transitions, 5653 flow, removed 108 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:51,365 INFO L231 Difference]: Finished difference. Result has 377 places, 441 transitions, 4851 flow [2024-06-14 12:01:51,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4851, PETRI_PLACES=377, PETRI_TRANSITIONS=441} [2024-06-14 12:01:51,366 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-14 12:01:51,366 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 441 transitions, 4851 flow [2024-06-14 12:01:51,366 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 12:01:51,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:51,367 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 12:01:51,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:01:51,367 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 12:01:51,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1002467088, now seen corresponding path program 5 times [2024-06-14 12:01:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:51,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180835349] [2024-06-14 12:01:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:52,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180835349] [2024-06-14 12:01:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180835349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:52,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731385574] [2024-06-14 12:01:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:52,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:52,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:52,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 441 transitions, 4851 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 12:01:52,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:52,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:52,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:54,257 INFO L124 PetriNetUnfolderBase]: 4040/6676 cut-off events. [2024-06-14 12:01:54,257 INFO L125 PetriNetUnfolderBase]: For 1939840/1939846 co-relation queries the response was YES. [2024-06-14 12:01:54,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71771 conditions, 6676 events. 4040/6676 cut-off events. For 1939840/1939846 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44308 event pairs, 892 based on Foata normal form. 5/6604 useless extension candidates. Maximal degree in co-relation 71586. Up to 6061 conditions per place. [2024-06-14 12:01:54,389 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 378 selfloop transitions, 40 changer transitions 0/464 dead transitions. [2024-06-14 12:01:54,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 464 transitions, 6206 flow [2024-06-14 12:01:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:01:54,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:01:54,391 INFO L175 Difference]: Start difference. First operand has 377 places, 441 transitions, 4851 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:01:54,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 464 transitions, 6206 flow [2024-06-14 12:01:58,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 464 transitions, 6058 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:58,481 INFO L231 Difference]: Finished difference. Result has 379 places, 449 transitions, 5021 flow [2024-06-14 12:01:58,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4703, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5021, PETRI_PLACES=379, PETRI_TRANSITIONS=449} [2024-06-14 12:01:58,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-14 12:01:58,482 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 449 transitions, 5021 flow [2024-06-14 12:01:58,482 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 12:01:58,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:58,483 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 12:01:58,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:01:58,483 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 12:01:58,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1001991858, now seen corresponding path program 6 times [2024-06-14 12:01:58,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:58,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265512489] [2024-06-14 12:01:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:58,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:59,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265512489] [2024-06-14 12:01:59,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265512489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:59,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:59,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253629699] [2024-06-14 12:01:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:59,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:59,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:01:59,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 449 transitions, 5021 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 12:01:59,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:59,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:01:59,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:02,237 INFO L124 PetriNetUnfolderBase]: 4035/6674 cut-off events. [2024-06-14 12:02:02,238 INFO L125 PetriNetUnfolderBase]: For 1959895/1959901 co-relation queries the response was YES. [2024-06-14 12:02:02,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72044 conditions, 6674 events. 4035/6674 cut-off events. For 1959895/1959901 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44337 event pairs, 892 based on Foata normal form. 5/6602 useless extension candidates. Maximal degree in co-relation 71857. Up to 6070 conditions per place. [2024-06-14 12:02:02,637 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 30 changer transitions 0/464 dead transitions. [2024-06-14 12:02:02,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 464 transitions, 5906 flow [2024-06-14 12:02:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:02:02,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 12:02:02,639 INFO L175 Difference]: Start difference. First operand has 379 places, 449 transitions, 5021 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:02:02,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 464 transitions, 5906 flow [2024-06-14 12:02:08,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 464 transitions, 5708 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:08,718 INFO L231 Difference]: Finished difference. Result has 383 places, 450 transitions, 4906 flow [2024-06-14 12:02:08,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4829, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4906, PETRI_PLACES=383, PETRI_TRANSITIONS=450} [2024-06-14 12:02:08,719 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 12:02:08,719 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 450 transitions, 4906 flow [2024-06-14 12:02:08,719 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 12:02:08,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:08,719 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 12:02:08,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:02:08,719 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 12:02:08,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1976864440, now seen corresponding path program 7 times [2024-06-14 12:02:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241096051] [2024-06-14 12:02:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241096051] [2024-06-14 12:02:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241096051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622853249] [2024-06-14 12:02:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:10,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:10,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:10,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:10,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 450 transitions, 4906 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 12:02:10,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:10,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:10,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:12,802 INFO L124 PetriNetUnfolderBase]: 4050/6696 cut-off events. [2024-06-14 12:02:12,803 INFO L125 PetriNetUnfolderBase]: For 1996432/1996441 co-relation queries the response was YES. [2024-06-14 12:02:12,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72573 conditions, 6696 events. 4050/6696 cut-off events. For 1996432/1996441 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44526 event pairs, 896 based on Foata normal form. 7/6624 useless extension candidates. Maximal degree in co-relation 72384. Up to 6014 conditions per place. [2024-06-14 12:02:12,982 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 81 changer transitions 0/480 dead transitions. [2024-06-14 12:02:12,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 480 transitions, 6728 flow [2024-06-14 12:02:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:02:12,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:02:12,984 INFO L175 Difference]: Start difference. First operand has 383 places, 450 transitions, 4906 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:02:12,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 480 transitions, 6728 flow [2024-06-14 12:02:20,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 480 transitions, 6656 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:20,269 INFO L231 Difference]: Finished difference. Result has 387 places, 466 transitions, 5433 flow [2024-06-14 12:02:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5433, PETRI_PLACES=387, PETRI_TRANSITIONS=466} [2024-06-14 12:02:20,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 342 predicate places. [2024-06-14 12:02:20,270 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 466 transitions, 5433 flow [2024-06-14 12:02:20,270 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 12:02:20,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:20,270 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 12:02:20,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:02:20,270 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 12:02:20,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 618821230, now seen corresponding path program 8 times [2024-06-14 12:02:20,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:20,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580967047] [2024-06-14 12:02:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:20,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:21,952 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 12:02:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:21,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580967047] [2024-06-14 12:02:21,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580967047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:21,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:21,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950822616] [2024-06-14 12:02:21,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:22,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:22,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 466 transitions, 5433 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 12:02:22,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:22,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:22,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:24,033 INFO L124 PetriNetUnfolderBase]: 4061/6710 cut-off events. [2024-06-14 12:02:24,033 INFO L125 PetriNetUnfolderBase]: For 2038754/2038763 co-relation queries the response was YES. [2024-06-14 12:02:24,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73707 conditions, 6710 events. 4061/6710 cut-off events. For 2038754/2038763 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44575 event pairs, 894 based on Foata normal form. 7/6638 useless extension candidates. Maximal degree in co-relation 73515. Up to 6029 conditions per place. [2024-06-14 12:02:24,157 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 87 changer transitions 0/486 dead transitions. [2024-06-14 12:02:24,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 486 transitions, 7131 flow [2024-06-14 12:02:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:02:24,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:02:24,158 INFO L175 Difference]: Start difference. First operand has 387 places, 466 transitions, 5433 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:02:24,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 486 transitions, 7131 flow [2024-06-14 12:02:28,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 486 transitions, 6867 flow, removed 109 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:28,769 INFO L231 Difference]: Finished difference. Result has 393 places, 473 transitions, 5619 flow [2024-06-14 12:02:28,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5619, PETRI_PLACES=393, PETRI_TRANSITIONS=473} [2024-06-14 12:02:28,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 348 predicate places. [2024-06-14 12:02:28,769 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 473 transitions, 5619 flow [2024-06-14 12:02:28,770 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 12:02:28,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:28,770 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 12:02:28,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:02:28,770 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 12:02:28,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2146464200, now seen corresponding path program 9 times [2024-06-14 12:02:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:28,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638439602] [2024-06-14 12:02:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:28,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638439602] [2024-06-14 12:02:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638439602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:29,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:29,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932359567] [2024-06-14 12:02:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:29,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 473 transitions, 5619 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 12:02:29,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:29,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:31,941 INFO L124 PetriNetUnfolderBase]: 4070/6727 cut-off events. [2024-06-14 12:02:31,942 INFO L125 PetriNetUnfolderBase]: For 2056752/2056761 co-relation queries the response was YES. [2024-06-14 12:02:32,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73457 conditions, 6727 events. 4070/6727 cut-off events. For 2056752/2056761 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44732 event pairs, 898 based on Foata normal form. 7/6655 useless extension candidates. Maximal degree in co-relation 73262. Up to 6092 conditions per place. [2024-06-14 12:02:32,059 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 394 selfloop transitions, 47 changer transitions 0/487 dead transitions. [2024-06-14 12:02:32,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 487 transitions, 6621 flow [2024-06-14 12:02:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:02:32,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:02:32,060 INFO L175 Difference]: Start difference. First operand has 393 places, 473 transitions, 5619 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:02:32,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 487 transitions, 6621 flow [2024-06-14 12:02:36,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 487 transitions, 6437 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:36,340 INFO L231 Difference]: Finished difference. Result has 397 places, 476 transitions, 5635 flow [2024-06-14 12:02:36,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5635, PETRI_PLACES=397, PETRI_TRANSITIONS=476} [2024-06-14 12:02:36,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-14 12:02:36,341 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 476 transitions, 5635 flow [2024-06-14 12:02:36,341 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 12:02:36,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:36,341 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 12:02:36,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:02:36,341 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 12:02:36,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash 156114176, now seen corresponding path program 10 times [2024-06-14 12:02:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505930383] [2024-06-14 12:02:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505930383] [2024-06-14 12:02:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505930383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:37,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:37,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476781613] [2024-06-14 12:02:37,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:37,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:37,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:37,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 476 transitions, 5635 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 12:02:37,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:37,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:37,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:39,035 INFO L124 PetriNetUnfolderBase]: 4081/6742 cut-off events. [2024-06-14 12:02:39,035 INFO L125 PetriNetUnfolderBase]: For 2097283/2097289 co-relation queries the response was YES. [2024-06-14 12:02:39,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74055 conditions, 6742 events. 4081/6742 cut-off events. For 2097283/2097289 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44805 event pairs, 915 based on Foata normal form. 3/6664 useless extension candidates. Maximal degree in co-relation 73859. Up to 6024 conditions per place. [2024-06-14 12:02:39,166 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 364 selfloop transitions, 88 changer transitions 0/498 dead transitions. [2024-06-14 12:02:39,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 498 transitions, 7591 flow [2024-06-14 12:02:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:02:39,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:02:39,168 INFO L175 Difference]: Start difference. First operand has 397 places, 476 transitions, 5635 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:02:39,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 498 transitions, 7591 flow [2024-06-14 12:02:42,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 498 transitions, 7431 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:42,892 INFO L231 Difference]: Finished difference. Result has 399 places, 485 transitions, 6113 flow [2024-06-14 12:02:42,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6113, PETRI_PLACES=399, PETRI_TRANSITIONS=485} [2024-06-14 12:02:42,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 12:02:42,892 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 485 transitions, 6113 flow [2024-06-14 12:02:42,892 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 12:02:42,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:42,893 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 12:02:42,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:02:42,893 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 12:02:42,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash 156114362, now seen corresponding path program 10 times [2024-06-14 12:02:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:42,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125417813] [2024-06-14 12:02:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:42,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:43,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125417813] [2024-06-14 12:02:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125417813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:43,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:43,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:43,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744499218] [2024-06-14 12:02:43,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:43,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:43,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:43,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:02:43,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 485 transitions, 6113 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 12:02:43,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:43,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:02:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:45,753 INFO L124 PetriNetUnfolderBase]: 4290/7016 cut-off events. [2024-06-14 12:02:45,753 INFO L125 PetriNetUnfolderBase]: For 2137014/2137023 co-relation queries the response was YES. [2024-06-14 12:02:45,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76163 conditions, 7016 events. 4290/7016 cut-off events. For 2137014/2137023 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45923 event pairs, 962 based on Foata normal form. 5/7014 useless extension candidates. Maximal degree in co-relation 75966. Up to 6499 conditions per place. [2024-06-14 12:02:45,875 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 411 selfloop transitions, 87 changer transitions 0/503 dead transitions. [2024-06-14 12:02:45,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 503 transitions, 7701 flow [2024-06-14 12:02:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:02:45,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 12:02:45,877 INFO L175 Difference]: Start difference. First operand has 399 places, 485 transitions, 6113 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:02:45,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 503 transitions, 7701 flow [2024-06-14 12:02:50,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 503 transitions, 7377 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:50,589 INFO L231 Difference]: Finished difference. Result has 403 places, 491 transitions, 6251 flow [2024-06-14 12:02:50,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6251, PETRI_PLACES=403, PETRI_TRANSITIONS=491} [2024-06-14 12:02:50,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-14 12:02:50,589 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 491 transitions, 6251 flow [2024-06-14 12:02:50,589 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 12:02:50,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:50,589 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 12:02:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:02:50,590 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 12:02:50,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash 156411280, now seen corresponding path program 10 times [2024-06-14 12:02:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249858674] [2024-06-14 12:02:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:51,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:51,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249858674] [2024-06-14 12:02:51,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249858674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:51,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670884099] [2024-06-14 12:02:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:52,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:02:52,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 491 transitions, 6251 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 12:02:52,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:52,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:02:52,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:53,710 INFO L124 PetriNetUnfolderBase]: 4083/6746 cut-off events. [2024-06-14 12:02:53,711 INFO L125 PetriNetUnfolderBase]: For 2144740/2144749 co-relation queries the response was YES. [2024-06-14 12:02:53,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74546 conditions, 6746 events. 4083/6746 cut-off events. For 2144740/2144749 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44862 event pairs, 896 based on Foata normal form. 7/6674 useless extension candidates. Maximal degree in co-relation 74348. Up to 6098 conditions per place. [2024-06-14 12:02:53,829 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 400 selfloop transitions, 57 changer transitions 0/505 dead transitions. [2024-06-14 12:02:53,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 505 transitions, 7518 flow [2024-06-14 12:02:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:02:53,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:02:53,831 INFO L175 Difference]: Start difference. First operand has 403 places, 491 transitions, 6251 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:02:53,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 505 transitions, 7518 flow [2024-06-14 12:02:59,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 505 transitions, 7176 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-14 12:02:59,279 INFO L231 Difference]: Finished difference. Result has 407 places, 493 transitions, 6083 flow [2024-06-14 12:02:59,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5915, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6083, PETRI_PLACES=407, PETRI_TRANSITIONS=493} [2024-06-14 12:02:59,280 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-14 12:02:59,280 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 493 transitions, 6083 flow [2024-06-14 12:02:59,281 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 12:02:59,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:59,281 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 12:02:59,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:02:59,281 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 12:02:59,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash 155994206, now seen corresponding path program 11 times [2024-06-14 12:02:59,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:59,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335475887] [2024-06-14 12:02:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:59,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:00,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:00,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335475887] [2024-06-14 12:03:00,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335475887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:00,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:00,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161618013] [2024-06-14 12:03:00,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:00,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:00,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:00,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 493 transitions, 6083 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 12:03:00,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:00,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:00,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:02,150 INFO L124 PetriNetUnfolderBase]: 4080/6743 cut-off events. [2024-06-14 12:03:02,150 INFO L125 PetriNetUnfolderBase]: For 2155600/2155603 co-relation queries the response was YES. [2024-06-14 12:03:02,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74088 conditions, 6743 events. 4080/6743 cut-off events. For 2155600/2155603 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44844 event pairs, 893 based on Foata normal form. 1/6665 useless extension candidates. Maximal degree in co-relation 73888. Up to 6134 conditions per place. [2024-06-14 12:03:02,275 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 427 selfloop transitions, 29 changer transitions 0/504 dead transitions. [2024-06-14 12:03:02,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 504 transitions, 7021 flow [2024-06-14 12:03:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:03:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 12:03:02,277 INFO L175 Difference]: Start difference. First operand has 407 places, 493 transitions, 6083 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:03:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 504 transitions, 7021 flow [2024-06-14 12:03:07,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 504 transitions, 6798 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:07,330 INFO L231 Difference]: Finished difference. Result has 410 places, 493 transitions, 5924 flow [2024-06-14 12:03:07,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5860, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5924, PETRI_PLACES=410, PETRI_TRANSITIONS=493} [2024-06-14 12:03:07,331 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 365 predicate places. [2024-06-14 12:03:07,331 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 493 transitions, 5924 flow [2024-06-14 12:03:07,331 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 12:03:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:07,331 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 12:03:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:03:07,332 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 12:03:07,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1086334882, now seen corresponding path program 11 times [2024-06-14 12:03:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49375587] [2024-06-14 12:03:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:07,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:08,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49375587] [2024-06-14 12:03:08,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49375587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:08,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:08,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120737442] [2024-06-14 12:03:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:08,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:08,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 493 transitions, 5924 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 12:03:08,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:08,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:08,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:10,657 INFO L124 PetriNetUnfolderBase]: 4289/7013 cut-off events. [2024-06-14 12:03:10,657 INFO L125 PetriNetUnfolderBase]: For 2187175/2187184 co-relation queries the response was YES. [2024-06-14 12:03:10,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75562 conditions, 7013 events. 4289/7013 cut-off events. For 2187175/2187184 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45874 event pairs, 962 based on Foata normal form. 5/7011 useless extension candidates. Maximal degree in co-relation 75361. Up to 6497 conditions per place. [2024-06-14 12:03:10,832 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 415 selfloop transitions, 88 changer transitions 0/508 dead transitions. [2024-06-14 12:03:10,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 508 transitions, 7368 flow [2024-06-14 12:03:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:03:10,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:03:10,834 INFO L175 Difference]: Start difference. First operand has 410 places, 493 transitions, 5924 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:03:10,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 508 transitions, 7368 flow [2024-06-14 12:03:16,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 508 transitions, 7236 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 12:03:16,395 INFO L231 Difference]: Finished difference. Result has 409 places, 496 transitions, 6090 flow [2024-06-14 12:03:16,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6090, PETRI_PLACES=409, PETRI_TRANSITIONS=496} [2024-06-14 12:03:16,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-14 12:03:16,395 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 496 transitions, 6090 flow [2024-06-14 12:03:16,396 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 12:03:16,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:16,396 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 12:03:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:03:16,396 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 12:03:16,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash 333483032, now seen corresponding path program 12 times [2024-06-14 12:03:16,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:16,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565733326] [2024-06-14 12:03:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:16,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:17,290 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 12:03:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565733326] [2024-06-14 12:03:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565733326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:17,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:17,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825373587] [2024-06-14 12:03:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:17,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:17,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 496 transitions, 6090 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 12:03:17,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:17,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:17,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:19,107 INFO L124 PetriNetUnfolderBase]: 4286/7015 cut-off events. [2024-06-14 12:03:19,108 INFO L125 PetriNetUnfolderBase]: For 2204546/2204555 co-relation queries the response was YES. [2024-06-14 12:03:19,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75629 conditions, 7015 events. 4286/7015 cut-off events. For 2204546/2204555 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45960 event pairs, 964 based on Foata normal form. 5/7013 useless extension candidates. Maximal degree in co-relation 75428. Up to 6494 conditions per place. [2024-06-14 12:03:19,238 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 90 changer transitions 0/507 dead transitions. [2024-06-14 12:03:19,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 507 transitions, 7120 flow [2024-06-14 12:03:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:03:19,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:03:19,240 INFO L175 Difference]: Start difference. First operand has 409 places, 496 transitions, 6090 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:03:19,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 507 transitions, 7120 flow [2024-06-14 12:03:24,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 507 transitions, 6728 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:24,207 INFO L231 Difference]: Finished difference. Result has 411 places, 496 transitions, 5884 flow [2024-06-14 12:03:24,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5884, PETRI_PLACES=411, PETRI_TRANSITIONS=496} [2024-06-14 12:03:24,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-14 12:03:24,207 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 496 transitions, 5884 flow [2024-06-14 12:03:24,208 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 12:03:24,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:24,208 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 12:03:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:03:24,208 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 12:03:24,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 333721360, now seen corresponding path program 11 times [2024-06-14 12:03:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:24,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080746381] [2024-06-14 12:03:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:25,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:25,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080746381] [2024-06-14 12:03:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080746381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:25,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:25,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988112774] [2024-06-14 12:03:25,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:25,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:25,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:25,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 496 transitions, 5884 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 12:03:25,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:25,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:25,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:27,584 INFO L124 PetriNetUnfolderBase]: 4079/6747 cut-off events. [2024-06-14 12:03:27,584 INFO L125 PetriNetUnfolderBase]: For 2215906/2215915 co-relation queries the response was YES. [2024-06-14 12:03:27,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74092 conditions, 6747 events. 4079/6747 cut-off events. For 2215906/2215915 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44903 event pairs, 898 based on Foata normal form. 7/6675 useless extension candidates. Maximal degree in co-relation 73890. Up to 6092 conditions per place. [2024-06-14 12:03:27,738 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 403 selfloop transitions, 58 changer transitions 0/510 dead transitions. [2024-06-14 12:03:27,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 510 transitions, 7190 flow [2024-06-14 12:03:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:03:27,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:03:27,740 INFO L175 Difference]: Start difference. First operand has 411 places, 496 transitions, 5884 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:03:27,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 510 transitions, 7190 flow [2024-06-14 12:03:33,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 510 transitions, 6926 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:33,574 INFO L231 Difference]: Finished difference. Result has 413 places, 498 transitions, 5820 flow [2024-06-14 12:03:33,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5820, PETRI_PLACES=413, PETRI_TRANSITIONS=498} [2024-06-14 12:03:33,575 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-14 12:03:33,575 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 498 transitions, 5820 flow [2024-06-14 12:03:33,575 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 12:03:33,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:33,575 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 12:03:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:03:33,575 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 12:03:33,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1086334634, now seen corresponding path program 12 times [2024-06-14 12:03:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:33,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182278179] [2024-06-14 12:03:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182278179] [2024-06-14 12:03:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182278179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:34,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:34,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:34,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098068862] [2024-06-14 12:03:34,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:34,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:34,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:34,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:34,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:34,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 498 transitions, 5820 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 12:03:34,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:34,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:34,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:36,832 INFO L124 PetriNetUnfolderBase]: 4076/6737 cut-off events. [2024-06-14 12:03:36,832 INFO L125 PetriNetUnfolderBase]: For 2232383/2232392 co-relation queries the response was YES. [2024-06-14 12:03:36,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73954 conditions, 6737 events. 4076/6737 cut-off events. For 2232383/2232392 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44801 event pairs, 896 based on Foata normal form. 7/6665 useless extension candidates. Maximal degree in co-relation 73750. Up to 6101 conditions per place. [2024-06-14 12:03:36,953 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 47 changer transitions 0/509 dead transitions. [2024-06-14 12:03:36,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 509 transitions, 6766 flow [2024-06-14 12:03:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:03:36,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:03:36,954 INFO L175 Difference]: Start difference. First operand has 413 places, 498 transitions, 5820 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:03:36,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 509 transitions, 6766 flow [2024-06-14 12:03:41,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 509 transitions, 6572 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:41,553 INFO L231 Difference]: Finished difference. Result has 416 places, 498 transitions, 5726 flow [2024-06-14 12:03:41,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=408, 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=8, PETRI_FLOW=5726, PETRI_PLACES=416, PETRI_TRANSITIONS=498} [2024-06-14 12:03:41,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-14 12:03:41,554 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 498 transitions, 5726 flow [2024-06-14 12:03:41,554 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 12:03:41,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:41,554 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 12:03:41,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:03:41,554 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:41,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 333245696, now seen corresponding path program 12 times [2024-06-14 12:03:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:41,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589746043] [2024-06-14 12:03:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:42,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589746043] [2024-06-14 12:03:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589746043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:42,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513131082] [2024-06-14 12:03:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:42,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:42,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:42,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:42,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:03:42,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 498 transitions, 5726 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 12:03:42,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:42,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:03:42,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:44,514 INFO L124 PetriNetUnfolderBase]: 4071/6728 cut-off events. [2024-06-14 12:03:44,514 INFO L125 PetriNetUnfolderBase]: For 2248566/2248572 co-relation queries the response was YES. [2024-06-14 12:03:44,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73810 conditions, 6728 events. 4071/6728 cut-off events. For 2248566/2248572 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44716 event pairs, 915 based on Foata normal form. 3/6650 useless extension candidates. Maximal degree in co-relation 73605. Up to 6013 conditions per place. [2024-06-14 12:03:44,634 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 90 changer transitions 0/509 dead transitions. [2024-06-14 12:03:44,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 509 transitions, 6672 flow [2024-06-14 12:03:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:03:44,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:03:44,635 INFO L175 Difference]: Start difference. First operand has 416 places, 498 transitions, 5726 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:03:44,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 509 transitions, 6672 flow [2024-06-14 12:03:50,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 509 transitions, 6478 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:50,973 INFO L231 Difference]: Finished difference. Result has 418 places, 498 transitions, 5718 flow [2024-06-14 12:03:50,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5718, PETRI_PLACES=418, PETRI_TRANSITIONS=498} [2024-06-14 12:03:50,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-14 12:03:50,974 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 498 transitions, 5718 flow [2024-06-14 12:03:50,974 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 12:03:50,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:50,974 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 12:03:50,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:03:50,975 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 12:03:50,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash 327522136, now seen corresponding path program 2 times [2024-06-14 12:03:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:50,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881950528] [2024-06-14 12:03:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:50,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:52,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881950528] [2024-06-14 12:03:52,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881950528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:52,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:52,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:03:52,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628171407] [2024-06-14 12:03:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:52,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:03:52,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:52,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:03:52,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:03:52,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:03:52,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 498 transitions, 5718 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 12:03:52,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:52,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:03:52,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:54,411 INFO L124 PetriNetUnfolderBase]: 4400/7217 cut-off events. [2024-06-14 12:03:54,412 INFO L125 PetriNetUnfolderBase]: For 2360735/2360738 co-relation queries the response was YES. [2024-06-14 12:03:54,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76903 conditions, 7217 events. 4400/7217 cut-off events. For 2360735/2360738 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 47637 event pairs, 921 based on Foata normal form. 12/7222 useless extension candidates. Maximal degree in co-relation 76697. Up to 6102 conditions per place. [2024-06-14 12:03:54,549 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 434 selfloop transitions, 111 changer transitions 0/550 dead transitions. [2024-06-14 12:03:54,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 550 transitions, 7180 flow [2024-06-14 12:03:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:03:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:03:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-14 12:03:54,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-14 12:03:54,550 INFO L175 Difference]: Start difference. First operand has 418 places, 498 transitions, 5718 flow. Second operand 11 states and 217 transitions. [2024-06-14 12:03:54,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 550 transitions, 7180 flow [2024-06-14 12:04:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 550 transitions, 6962 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:00,047 INFO L231 Difference]: Finished difference. Result has 424 places, 506 transitions, 5912 flow [2024-06-14 12:04:00,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5500, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5912, PETRI_PLACES=424, PETRI_TRANSITIONS=506} [2024-06-14 12:04:00,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-14 12:04:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 506 transitions, 5912 flow [2024-06-14 12:04:00,047 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 12:04:00,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:00,048 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 12:04:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:04:00,048 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 12:04:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1054042358, now seen corresponding path program 3 times [2024-06-14 12:04:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258307972] [2024-06-14 12:04:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:01,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:01,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258307972] [2024-06-14 12:04:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258307972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:01,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:01,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967580105] [2024-06-14 12:04:01,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:01,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:01,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:01,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:01,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:01,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 506 transitions, 5912 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 12:04:01,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:01,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:01,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:03,855 INFO L124 PetriNetUnfolderBase]: 4510/7417 cut-off events. [2024-06-14 12:04:03,855 INFO L125 PetriNetUnfolderBase]: For 2406848/2406851 co-relation queries the response was YES. [2024-06-14 12:04:03,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79404 conditions, 7417 events. 4510/7417 cut-off events. For 2406848/2406851 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49457 event pairs, 946 based on Foata normal form. 12/7422 useless extension candidates. Maximal degree in co-relation 79195. Up to 6375 conditions per place. [2024-06-14 12:04:04,004 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 424 selfloop transitions, 133 changer transitions 0/562 dead transitions. [2024-06-14 12:04:04,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 562 transitions, 7442 flow [2024-06-14 12:04:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-14 12:04:04,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-14 12:04:04,005 INFO L175 Difference]: Start difference. First operand has 424 places, 506 transitions, 5912 flow. Second operand 11 states and 215 transitions. [2024-06-14 12:04:04,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 562 transitions, 7442 flow [2024-06-14 12:04:09,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 562 transitions, 7112 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:09,886 INFO L231 Difference]: Finished difference. Result has 430 places, 520 transitions, 6123 flow [2024-06-14 12:04:09,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6123, PETRI_PLACES=430, PETRI_TRANSITIONS=520} [2024-06-14 12:04:09,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-14 12:04:09,887 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 520 transitions, 6123 flow [2024-06-14 12:04:09,887 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 12:04:09,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:09,887 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 12:04:09,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:04:09,887 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 12:04:09,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 294008098, now seen corresponding path program 4 times [2024-06-14 12:04:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:09,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484662368] [2024-06-14 12:04:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484662368] [2024-06-14 12:04:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484662368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:11,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415809867] [2024-06-14 12:04:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:11,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:11,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 520 transitions, 6123 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 12:04:11,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:11,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:11,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:13,455 INFO L124 PetriNetUnfolderBase]: 4715/7822 cut-off events. [2024-06-14 12:04:13,455 INFO L125 PetriNetUnfolderBase]: For 2453087/2453090 co-relation queries the response was YES. [2024-06-14 12:04:13,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81855 conditions, 7822 events. 4715/7822 cut-off events. For 2453087/2453090 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 53328 event pairs, 962 based on Foata normal form. 12/7827 useless extension candidates. Maximal degree in co-relation 81644. Up to 5385 conditions per place. [2024-06-14 12:04:13,589 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 411 selfloop transitions, 153 changer transitions 0/569 dead transitions. [2024-06-14 12:04:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 569 transitions, 7939 flow [2024-06-14 12:04:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-14 12:04:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-14 12:04:13,591 INFO L175 Difference]: Start difference. First operand has 430 places, 520 transitions, 6123 flow. Second operand 11 states and 216 transitions. [2024-06-14 12:04:13,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 569 transitions, 7939 flow [2024-06-14 12:04:19,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 569 transitions, 7711 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:19,957 INFO L231 Difference]: Finished difference. Result has 437 places, 525 transitions, 6439 flow [2024-06-14 12:04:19,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5895, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6439, PETRI_PLACES=437, PETRI_TRANSITIONS=525} [2024-06-14 12:04:19,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-14 12:04:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 525 transitions, 6439 flow [2024-06-14 12:04:19,961 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 12:04:19,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:19,962 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 12:04:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:04:19,962 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 12:04:19,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:19,962 INFO L85 PathProgramCache]: Analyzing trace with hash 62162068, now seen corresponding path program 5 times [2024-06-14 12:04:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:19,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970715451] [2024-06-14 12:04:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:21,179 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 12:04:21,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970715451] [2024-06-14 12:04:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970715451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:21,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:21,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279057364] [2024-06-14 12:04:21,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:21,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:21,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 525 transitions, 6439 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 12:04:21,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:21,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:21,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:23,856 INFO L124 PetriNetUnfolderBase]: 4756/7903 cut-off events. [2024-06-14 12:04:23,856 INFO L125 PetriNetUnfolderBase]: For 2478251/2478254 co-relation queries the response was YES. [2024-06-14 12:04:23,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82402 conditions, 7903 events. 4756/7903 cut-off events. For 2478251/2478254 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 54079 event pairs, 1036 based on Foata normal form. 12/7908 useless extension candidates. Maximal degree in co-relation 82189. Up to 6617 conditions per place. [2024-06-14 12:04:24,019 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 443 selfloop transitions, 121 changer transitions 0/569 dead transitions. [2024-06-14 12:04:24,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 569 transitions, 7865 flow [2024-06-14 12:04:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-14 12:04:24,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-14 12:04:24,020 INFO L175 Difference]: Start difference. First operand has 437 places, 525 transitions, 6439 flow. Second operand 11 states and 218 transitions. [2024-06-14 12:04:24,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 569 transitions, 7865 flow [2024-06-14 12:04:30,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 569 transitions, 7518 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:30,226 INFO L231 Difference]: Finished difference. Result has 441 places, 527 transitions, 6452 flow [2024-06-14 12:04:30,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6452, PETRI_PLACES=441, PETRI_TRANSITIONS=527} [2024-06-14 12:04:30,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 396 predicate places. [2024-06-14 12:04:30,227 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 527 transitions, 6452 flow [2024-06-14 12:04:30,227 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 12:04:30,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:30,227 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 12:04:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:04:30,228 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 12:04:30,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 805880980, now seen corresponding path program 6 times [2024-06-14 12:04:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290689656] [2024-06-14 12:04:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:31,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:31,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290689656] [2024-06-14 12:04:31,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290689656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:31,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:31,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:31,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039253745] [2024-06-14 12:04:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:31,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:31,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:04:31,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 527 transitions, 6452 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 12:04:31,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:31,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:04:31,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:33,905 INFO L124 PetriNetUnfolderBase]: 4736/7871 cut-off events. [2024-06-14 12:04:33,905 INFO L125 PetriNetUnfolderBase]: For 2408769/2408772 co-relation queries the response was YES. [2024-06-14 12:04:34,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80158 conditions, 7871 events. 4736/7871 cut-off events. For 2408769/2408772 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 53863 event pairs, 1022 based on Foata normal form. 12/7876 useless extension candidates. Maximal degree in co-relation 79943. Up to 6769 conditions per place. [2024-06-14 12:04:34,052 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 435 selfloop transitions, 128 changer transitions 0/568 dead transitions. [2024-06-14 12:04:34,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 568 transitions, 7618 flow [2024-06-14 12:04:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:04:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:04:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-14 12:04:34,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-14 12:04:34,053 INFO L175 Difference]: Start difference. First operand has 441 places, 527 transitions, 6452 flow. Second operand 11 states and 215 transitions. [2024-06-14 12:04:34,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 568 transitions, 7618 flow [2024-06-14 12:04:40,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 568 transitions, 7299 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:40,915 INFO L231 Difference]: Finished difference. Result has 443 places, 526 transitions, 6231 flow [2024-06-14 12:04:40,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6231, PETRI_PLACES=443, PETRI_TRANSITIONS=526} [2024-06-14 12:04:40,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-14 12:04:40,917 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 526 transitions, 6231 flow [2024-06-14 12:04:40,917 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 12:04:40,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:40,917 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 12:04:40,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:04:40,917 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:40,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash 155991230, now seen corresponding path program 4 times [2024-06-14 12:04:40,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:40,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013663756] [2024-06-14 12:04:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:40,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:42,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:42,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013663756] [2024-06-14 12:04:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013663756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:42,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:42,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:42,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794257044] [2024-06-14 12:04:42,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:42,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:42,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:42,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:42,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:42,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 526 transitions, 6231 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 12:04:42,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:42,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:42,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:44,027 INFO L124 PetriNetUnfolderBase]: 4525/7598 cut-off events. [2024-06-14 12:04:44,028 INFO L125 PetriNetUnfolderBase]: For 2332714/2332717 co-relation queries the response was YES. [2024-06-14 12:04:44,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77756 conditions, 7598 events. 4525/7598 cut-off events. For 2332714/2332717 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52717 event pairs, 986 based on Foata normal form. 2/7521 useless extension candidates. Maximal degree in co-relation 77542. Up to 6906 conditions per place. [2024-06-14 12:04:44,164 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 463 selfloop transitions, 28 changer transitions 0/540 dead transitions. [2024-06-14 12:04:44,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 540 transitions, 7335 flow [2024-06-14 12:04:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:04:44,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:04:44,165 INFO L175 Difference]: Start difference. First operand has 443 places, 526 transitions, 6231 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:04:44,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 540 transitions, 7335 flow [2024-06-14 12:04:51,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 540 transitions, 6701 flow, removed 21 selfloop flow, removed 15 redundant places. [2024-06-14 12:04:51,589 INFO L231 Difference]: Finished difference. Result has 436 places, 528 transitions, 5756 flow [2024-06-14 12:04:51,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5597, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5756, PETRI_PLACES=436, PETRI_TRANSITIONS=528} [2024-06-14 12:04:51,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-14 12:04:51,590 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 528 transitions, 5756 flow [2024-06-14 12:04:51,590 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 12:04:51,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:51,590 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 12:04:51,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:04:51,590 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:51,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash 824986198, now seen corresponding path program 1 times [2024-06-14 12:04:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922647957] [2024-06-14 12:04:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:52,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:52,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922647957] [2024-06-14 12:04:52,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922647957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:52,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:04:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490174878] [2024-06-14 12:04:52,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:52,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:04:52,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:04:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:04:52,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:04:52,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 528 transitions, 5756 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 12:04:52,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:52,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:04:52,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:54,812 INFO L124 PetriNetUnfolderBase]: 4604/7737 cut-off events. [2024-06-14 12:04:54,813 INFO L125 PetriNetUnfolderBase]: For 2333597/2333597 co-relation queries the response was YES. [2024-06-14 12:04:54,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76199 conditions, 7737 events. 4604/7737 cut-off events. For 2333597/2333597 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53599 event pairs, 989 based on Foata normal form. 1/7735 useless extension candidates. Maximal degree in co-relation 75991. Up to 7113 conditions per place. [2024-06-14 12:04:54,934 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 507 selfloop transitions, 20 changer transitions 0/555 dead transitions. [2024-06-14 12:04:54,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 555 transitions, 6992 flow [2024-06-14 12:04:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:04:54,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:04:54,935 INFO L175 Difference]: Start difference. First operand has 436 places, 528 transitions, 5756 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:04:54,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 555 transitions, 6992 flow [2024-06-14 12:05:02,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 555 transitions, 6849 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:02,632 INFO L231 Difference]: Finished difference. Result has 439 places, 531 transitions, 5787 flow [2024-06-14 12:05:02,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5787, PETRI_PLACES=439, PETRI_TRANSITIONS=531} [2024-06-14 12:05:02,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-14 12:05:02,632 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 531 transitions, 5787 flow [2024-06-14 12:05:02,632 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 12:05:02,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:02,633 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 12:05:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:05:02,633 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:02,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash 37208332, now seen corresponding path program 1 times [2024-06-14 12:05:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326530880] [2024-06-14 12:05:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:02,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:03,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:03,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326530880] [2024-06-14 12:05:03,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326530880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:03,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:03,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:03,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429292712] [2024-06-14 12:05:03,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:03,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:03,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:03,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:03,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:03,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 531 transitions, 5787 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 12:05:03,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:03,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:03,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:05,816 INFO L124 PetriNetUnfolderBase]: 4624/7769 cut-off events. [2024-06-14 12:05:05,817 INFO L125 PetriNetUnfolderBase]: For 2425194/2425194 co-relation queries the response was YES. [2024-06-14 12:05:05,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77071 conditions, 7769 events. 4624/7769 cut-off events. For 2425194/2425194 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 53864 event pairs, 988 based on Foata normal form. 6/7772 useless extension candidates. Maximal degree in co-relation 76862. Up to 7135 conditions per place. [2024-06-14 12:05:05,976 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 509 selfloop transitions, 21 changer transitions 0/558 dead transitions. [2024-06-14 12:05:05,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 558 transitions, 6997 flow [2024-06-14 12:05:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:05:05,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:05:05,978 INFO L175 Difference]: Start difference. First operand has 439 places, 531 transitions, 5787 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:05:05,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 558 transitions, 6997 flow [2024-06-14 12:05:13,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 558 transitions, 6845 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:13,154 INFO L231 Difference]: Finished difference. Result has 441 places, 535 transitions, 5774 flow [2024-06-14 12:05:13,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5635, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5774, PETRI_PLACES=441, PETRI_TRANSITIONS=535} [2024-06-14 12:05:13,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 396 predicate places. [2024-06-14 12:05:13,155 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 535 transitions, 5774 flow [2024-06-14 12:05:13,155 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 12:05:13,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:13,155 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 12:05:13,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:05:13,155 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:13,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -453925946, now seen corresponding path program 2 times [2024-06-14 12:05:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784336269] [2024-06-14 12:05:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:13,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:14,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:14,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784336269] [2024-06-14 12:05:14,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784336269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:14,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:14,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:14,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475640107] [2024-06-14 12:05:14,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:14,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:14,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:14,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:14,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 535 transitions, 5774 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 12:05:14,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:14,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:14,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:16,626 INFO L124 PetriNetUnfolderBase]: 4648/7805 cut-off events. [2024-06-14 12:05:16,626 INFO L125 PetriNetUnfolderBase]: For 2472294/2472298 co-relation queries the response was YES. [2024-06-14 12:05:16,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78556 conditions, 7805 events. 4648/7805 cut-off events. For 2472294/2472298 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 54041 event pairs, 988 based on Foata normal form. 6/7807 useless extension candidates. Maximal degree in co-relation 78346. Up to 7160 conditions per place. [2024-06-14 12:05:16,761 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 506 selfloop transitions, 26 changer transitions 0/560 dead transitions. [2024-06-14 12:05:16,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 560 transitions, 6996 flow [2024-06-14 12:05:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:05:16,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:05:16,762 INFO L175 Difference]: Start difference. First operand has 441 places, 535 transitions, 5774 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:05:16,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 560 transitions, 6996 flow [2024-06-14 12:05:23,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 560 transitions, 6889 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:23,762 INFO L231 Difference]: Finished difference. Result has 443 places, 539 transitions, 5824 flow [2024-06-14 12:05:23,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5824, PETRI_PLACES=443, PETRI_TRANSITIONS=539} [2024-06-14 12:05:23,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-14 12:05:23,762 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 539 transitions, 5824 flow [2024-06-14 12:05:23,763 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 12:05:23,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:23,763 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 12:05:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:05:23,763 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 12:05:23,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 41856472, now seen corresponding path program 3 times [2024-06-14 12:05:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:23,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674884703] [2024-06-14 12:05:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:25,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:25,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674884703] [2024-06-14 12:05:25,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674884703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:25,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:25,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893232205] [2024-06-14 12:05:25,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:25,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:25,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:25,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:25,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:25,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 539 transitions, 5824 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 12:05:25,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:25,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:25,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:27,378 INFO L124 PetriNetUnfolderBase]: 4668/7833 cut-off events. [2024-06-14 12:05:27,378 INFO L125 PetriNetUnfolderBase]: For 2476558/2476566 co-relation queries the response was YES. [2024-06-14 12:05:27,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79881 conditions, 7833 events. 4668/7833 cut-off events. For 2476558/2476566 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54304 event pairs, 987 based on Foata normal form. 2/7831 useless extension candidates. Maximal degree in co-relation 79670. Up to 7160 conditions per place. [2024-06-14 12:05:27,518 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 502 selfloop transitions, 37 changer transitions 0/567 dead transitions. [2024-06-14 12:05:27,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 567 transitions, 7454 flow [2024-06-14 12:05:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:05:27,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:05:27,520 INFO L175 Difference]: Start difference. First operand has 443 places, 539 transitions, 5824 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:05:27,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 567 transitions, 7454 flow [2024-06-14 12:05:35,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 567 transitions, 7329 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:35,933 INFO L231 Difference]: Finished difference. Result has 446 places, 545 transitions, 5960 flow [2024-06-14 12:05:35,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5960, PETRI_PLACES=446, PETRI_TRANSITIONS=545} [2024-06-14 12:05:35,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-14 12:05:35,934 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 545 transitions, 5960 flow [2024-06-14 12:05:35,934 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 12:05:35,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:35,934 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 12:05:35,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:05:35,935 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 12:05:35,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:35,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1115477774, now seen corresponding path program 4 times [2024-06-14 12:05:35,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:35,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874545133] [2024-06-14 12:05:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:35,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:37,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874545133] [2024-06-14 12:05:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874545133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:37,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:37,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:37,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917057409] [2024-06-14 12:05:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:37,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:37,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:37,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:37,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 545 transitions, 5960 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 12:05:37,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:37,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:39,507 INFO L124 PetriNetUnfolderBase]: 4717/7905 cut-off events. [2024-06-14 12:05:39,507 INFO L125 PetriNetUnfolderBase]: For 2588789/2588799 co-relation queries the response was YES. [2024-06-14 12:05:39,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82107 conditions, 7905 events. 4717/7905 cut-off events. For 2588789/2588799 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 54766 event pairs, 993 based on Foata normal form. 3/7905 useless extension candidates. Maximal degree in co-relation 81894. Up to 7218 conditions per place. [2024-06-14 12:05:39,656 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 504 selfloop transitions, 40 changer transitions 0/572 dead transitions. [2024-06-14 12:05:39,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 572 transitions, 7638 flow [2024-06-14 12:05:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:05:39,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 12:05:39,658 INFO L175 Difference]: Start difference. First operand has 446 places, 545 transitions, 5960 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:05:39,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 572 transitions, 7638 flow [2024-06-14 12:05:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 572 transitions, 7517 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:47,827 INFO L231 Difference]: Finished difference. Result has 450 places, 552 transitions, 6131 flow [2024-06-14 12:05:47,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6131, PETRI_PLACES=450, PETRI_TRANSITIONS=552} [2024-06-14 12:05:47,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 405 predicate places. [2024-06-14 12:05:47,828 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 552 transitions, 6131 flow [2024-06-14 12:05:47,828 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 12:05:47,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:47,828 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 12:05:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:05:47,829 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 12:05:47,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1002237874, now seen corresponding path program 5 times [2024-06-14 12:05:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:47,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575081302] [2024-06-14 12:05:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:49,032 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 12:05:49,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:49,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575081302] [2024-06-14 12:05:49,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575081302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:49,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:49,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:49,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767852161] [2024-06-14 12:05:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:49,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:49,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:05:49,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 552 transitions, 6131 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 12:05:49,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:49,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:05:49,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:51,375 INFO L124 PetriNetUnfolderBase]: 4699/7881 cut-off events. [2024-06-14 12:05:51,375 INFO L125 PetriNetUnfolderBase]: For 2588274/2588280 co-relation queries the response was YES. [2024-06-14 12:05:51,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82071 conditions, 7881 events. 4699/7881 cut-off events. For 2588274/2588280 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54640 event pairs, 989 based on Foata normal form. 7/7885 useless extension candidates. Maximal degree in co-relation 81856. Up to 7220 conditions per place. [2024-06-14 12:05:51,512 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 509 selfloop transitions, 33 changer transitions 0/570 dead transitions. [2024-06-14 12:05:51,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 570 transitions, 7291 flow [2024-06-14 12:05:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:05:51,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:05:51,514 INFO L175 Difference]: Start difference. First operand has 450 places, 552 transitions, 6131 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:05:51,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 570 transitions, 7291 flow [2024-06-14 12:06:00,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 570 transitions, 7149 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:00,806 INFO L231 Difference]: Finished difference. Result has 453 places, 552 transitions, 6062 flow [2024-06-14 12:06:00,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5989, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6062, PETRI_PLACES=453, PETRI_TRANSITIONS=552} [2024-06-14 12:06:00,807 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-14 12:06:00,807 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 552 transitions, 6062 flow [2024-06-14 12:06:00,808 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 12:06:00,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:00,808 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 12:06:00,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:06:00,808 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 12:06:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1002483952, now seen corresponding path program 1 times [2024-06-14 12:06:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:00,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433732508] [2024-06-14 12:06:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:00,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:02,232 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 12:06:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:02,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433732508] [2024-06-14 12:06:02,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433732508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:02,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:02,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231772173] [2024-06-14 12:06:02,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:02,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:02,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 552 transitions, 6062 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 12:06:02,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:02,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:02,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:04,716 INFO L124 PetriNetUnfolderBase]: 4641/7761 cut-off events. [2024-06-14 12:06:04,716 INFO L125 PetriNetUnfolderBase]: For 2531849/2531860 co-relation queries the response was YES. [2024-06-14 12:06:04,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81799 conditions, 7761 events. 4641/7761 cut-off events. For 2531849/2531860 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 53756 event pairs, 970 based on Foata normal form. 10/7692 useless extension candidates. Maximal degree in co-relation 81583. Up to 7098 conditions per place. [2024-06-14 12:06:04,853 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 497 selfloop transitions, 19 changer transitions 0/566 dead transitions. [2024-06-14 12:06:04,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 566 transitions, 7128 flow [2024-06-14 12:06:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:06:04,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:06:04,854 INFO L175 Difference]: Start difference. First operand has 453 places, 552 transitions, 6062 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:06:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 566 transitions, 7128 flow [2024-06-14 12:06:13,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 566 transitions, 6955 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:13,310 INFO L231 Difference]: Finished difference. Result has 454 places, 552 transitions, 5935 flow [2024-06-14 12:06:13,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5889, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5935, PETRI_PLACES=454, PETRI_TRANSITIONS=552} [2024-06-14 12:06:13,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 409 predicate places. [2024-06-14 12:06:13,311 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 552 transitions, 5935 flow [2024-06-14 12:06:13,311 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 12:06:13,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:13,311 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 12:06:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:06:13,312 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 12:06:13,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 214577002, now seen corresponding path program 6 times [2024-06-14 12:06:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:13,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865147060] [2024-06-14 12:06:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:13,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:14,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865147060] [2024-06-14 12:06:14,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865147060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828923273] [2024-06-14 12:06:14,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:14,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:14,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 552 transitions, 5935 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 12:06:14,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:16,934 INFO L124 PetriNetUnfolderBase]: 4694/7876 cut-off events. [2024-06-14 12:06:16,934 INFO L125 PetriNetUnfolderBase]: For 2589656/2589670 co-relation queries the response was YES. [2024-06-14 12:06:17,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81800 conditions, 7876 events. 4694/7876 cut-off events. For 2589656/2589670 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 54631 event pairs, 986 based on Foata normal form. 3/7875 useless extension candidates. Maximal degree in co-relation 81583. Up to 7135 conditions per place. [2024-06-14 12:06:17,090 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 483 selfloop transitions, 64 changer transitions 0/575 dead transitions. [2024-06-14 12:06:17,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 575 transitions, 7535 flow [2024-06-14 12:06:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:06:17,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 12:06:17,091 INFO L175 Difference]: Start difference. First operand has 454 places, 552 transitions, 5935 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:06:17,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 575 transitions, 7535 flow [2024-06-14 12:06:24,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 575 transitions, 7433 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:06:24,388 INFO L231 Difference]: Finished difference. Result has 455 places, 555 transitions, 6061 flow [2024-06-14 12:06:24,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5833, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6061, PETRI_PLACES=455, PETRI_TRANSITIONS=555} [2024-06-14 12:06:24,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 12:06:24,388 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 555 transitions, 6061 flow [2024-06-14 12:06:24,388 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 12:06:24,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:24,389 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 12:06:24,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:06:24,389 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 12:06:24,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1353923458, now seen corresponding path program 7 times [2024-06-14 12:06:24,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:24,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469564960] [2024-06-14 12:06:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:24,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:25,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:25,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469564960] [2024-06-14 12:06:25,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469564960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:25,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:25,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609654604] [2024-06-14 12:06:25,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:25,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:25,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 555 transitions, 6061 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 12:06:25,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:25,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:25,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:28,300 INFO L124 PetriNetUnfolderBase]: 4752/7961 cut-off events. [2024-06-14 12:06:28,300 INFO L125 PetriNetUnfolderBase]: For 2720127/2720144 co-relation queries the response was YES. [2024-06-14 12:06:28,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84832 conditions, 7961 events. 4752/7961 cut-off events. For 2720127/2720144 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 55161 event pairs, 1005 based on Foata normal form. 3/7959 useless extension candidates. Maximal degree in co-relation 84615. Up to 7254 conditions per place. [2024-06-14 12:06:28,454 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 505 selfloop transitions, 49 changer transitions 0/582 dead transitions. [2024-06-14 12:06:28,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 582 transitions, 7883 flow [2024-06-14 12:06:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:06:28,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:06:28,455 INFO L175 Difference]: Start difference. First operand has 455 places, 555 transitions, 6061 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:06:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 582 transitions, 7883 flow [2024-06-14 12:06:38,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 582 transitions, 7681 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:38,420 INFO L231 Difference]: Finished difference. Result has 458 places, 565 transitions, 6287 flow [2024-06-14 12:06:38,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6287, PETRI_PLACES=458, PETRI_TRANSITIONS=565} [2024-06-14 12:06:38,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 413 predicate places. [2024-06-14 12:06:38,421 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 565 transitions, 6287 flow [2024-06-14 12:06:38,421 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 12:06:38,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:38,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:38,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:06:38,422 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:38,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1086088618, now seen corresponding path program 8 times [2024-06-14 12:06:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131637527] [2024-06-14 12:06:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:39,635 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 12:06:39,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131637527] [2024-06-14 12:06:39,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131637527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:39,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701352247] [2024-06-14 12:06:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:39,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:39,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:39,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 565 transitions, 6287 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 12:06:39,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:39,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:39,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:41,993 INFO L124 PetriNetUnfolderBase]: 4734/7937 cut-off events. [2024-06-14 12:06:41,994 INFO L125 PetriNetUnfolderBase]: For 2719671/2719684 co-relation queries the response was YES. [2024-06-14 12:06:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84683 conditions, 7937 events. 4734/7937 cut-off events. For 2719671/2719684 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 55068 event pairs, 1003 based on Foata normal form. 7/7939 useless extension candidates. Maximal degree in co-relation 84464. Up to 7256 conditions per place. [2024-06-14 12:06:42,136 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 510 selfloop transitions, 42 changer transitions 0/580 dead transitions. [2024-06-14 12:06:42,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 580 transitions, 7471 flow [2024-06-14 12:06:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:06:42,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:06:42,137 INFO L175 Difference]: Start difference. First operand has 458 places, 565 transitions, 6287 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:06:42,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 580 transitions, 7471 flow [2024-06-14 12:06:53,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 580 transitions, 7311 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:53,203 INFO L231 Difference]: Finished difference. Result has 462 places, 565 transitions, 6218 flow [2024-06-14 12:06:53,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6218, PETRI_PLACES=462, PETRI_TRANSITIONS=565} [2024-06-14 12:06:53,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 417 predicate places. [2024-06-14 12:06:53,204 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 565 transitions, 6218 flow [2024-06-14 12:06:53,204 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 12:06:53,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:53,204 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 12:06:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:06:53,205 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:53,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash 618829166, now seen corresponding path program 9 times [2024-06-14 12:06:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17924696] [2024-06-14 12:06:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:54,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17924696] [2024-06-14 12:06:54,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17924696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:54,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374733469] [2024-06-14 12:06:54,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:54,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:06:54,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 565 transitions, 6218 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 12:06:54,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:54,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:06:54,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:57,165 INFO L124 PetriNetUnfolderBase]: 4739/7940 cut-off events. [2024-06-14 12:06:57,165 INFO L125 PetriNetUnfolderBase]: For 2693233/2693250 co-relation queries the response was YES. [2024-06-14 12:06:57,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84841 conditions, 7940 events. 4739/7940 cut-off events. For 2693233/2693250 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54932 event pairs, 996 based on Foata normal form. 2/7937 useless extension candidates. Maximal degree in co-relation 84620. Up to 7193 conditions per place. [2024-06-14 12:06:57,297 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 499 selfloop transitions, 88 changer transitions 0/615 dead transitions. [2024-06-14 12:06:57,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 615 transitions, 8275 flow [2024-06-14 12:06:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:06:57,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:06:57,299 INFO L175 Difference]: Start difference. First operand has 462 places, 565 transitions, 6218 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:06:57,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 615 transitions, 8275 flow [2024-06-14 12:07:05,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 615 transitions, 8031 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:05,638 INFO L231 Difference]: Finished difference. Result has 467 places, 600 transitions, 6768 flow [2024-06-14 12:07:05,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6768, PETRI_PLACES=467, PETRI_TRANSITIONS=600} [2024-06-14 12:07:05,638 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-14 12:07:05,639 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 600 transitions, 6768 flow [2024-06-14 12:07:05,639 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 12:07:05,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:05,639 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 12:07:05,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:07:05,639 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:05,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 333729296, now seen corresponding path program 10 times [2024-06-14 12:07:05,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200707887] [2024-06-14 12:07:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:06,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200707887] [2024-06-14 12:07:06,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200707887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:06,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009863378] [2024-06-14 12:07:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:06,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:06,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:06,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 600 transitions, 6768 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 12:07:06,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:06,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:06,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:09,784 INFO L124 PetriNetUnfolderBase]: 4742/7946 cut-off events. [2024-06-14 12:07:09,784 INFO L125 PetriNetUnfolderBase]: For 2715650/2715663 co-relation queries the response was YES. [2024-06-14 12:07:09,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85597 conditions, 7946 events. 4742/7946 cut-off events. For 2715650/2715663 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 54989 event pairs, 995 based on Foata normal form. 3/7945 useless extension candidates. Maximal degree in co-relation 85372. Up to 7226 conditions per place. [2024-06-14 12:07:09,921 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 525 selfloop transitions, 68 changer transitions 0/621 dead transitions. [2024-06-14 12:07:09,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 621 transitions, 8848 flow [2024-06-14 12:07:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:07:09,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 12:07:09,922 INFO L175 Difference]: Start difference. First operand has 467 places, 600 transitions, 6768 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:07:09,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 621 transitions, 8848 flow [2024-06-14 12:07:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 621 transitions, 8652 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:17,898 INFO L231 Difference]: Finished difference. Result has 473 places, 603 transitions, 6835 flow [2024-06-14 12:07:17,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6835, PETRI_PLACES=473, PETRI_TRANSITIONS=603} [2024-06-14 12:07:17,898 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 428 predicate places. [2024-06-14 12:07:17,898 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 603 transitions, 6835 flow [2024-06-14 12:07:17,898 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 12:07:17,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:17,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:17,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 12:07:17,899 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:17,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash 18584806, now seen corresponding path program 1 times [2024-06-14 12:07:17,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:17,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843221121] [2024-06-14 12:07:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:17,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:18,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843221121] [2024-06-14 12:07:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843221121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:18,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940000601] [2024-06-14 12:07:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:18,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:18,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:18,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 603 transitions, 6835 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:18,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:18,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:18,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:21,960 INFO L124 PetriNetUnfolderBase]: 4941/8156 cut-off events. [2024-06-14 12:07:21,961 INFO L125 PetriNetUnfolderBase]: For 2701480/2701480 co-relation queries the response was YES. [2024-06-14 12:07:22,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87981 conditions, 8156 events. 4941/8156 cut-off events. For 2701480/2701480 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55495 event pairs, 1026 based on Foata normal form. 1/8154 useless extension candidates. Maximal degree in co-relation 87754. Up to 7667 conditions per place. [2024-06-14 12:07:22,145 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 611 selfloop transitions, 20 changer transitions 0/636 dead transitions. [2024-06-14 12:07:22,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 636 transitions, 8315 flow [2024-06-14 12:07:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:07:22,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 12:07:22,147 INFO L175 Difference]: Start difference. First operand has 473 places, 603 transitions, 6835 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:07:22,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 636 transitions, 8315 flow [2024-06-14 12:07:31,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 636 transitions, 8009 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:31,920 INFO L231 Difference]: Finished difference. Result has 475 places, 606 transitions, 6723 flow [2024-06-14 12:07:31,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6723, PETRI_PLACES=475, PETRI_TRANSITIONS=606} [2024-06-14 12:07:31,921 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 430 predicate places. [2024-06-14 12:07:31,921 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 606 transitions, 6723 flow [2024-06-14 12:07:31,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:31,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:31,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:31,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 12:07:31,921 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:31,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash -926078370, now seen corresponding path program 2 times [2024-06-14 12:07:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364648923] [2024-06-14 12:07:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:32,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:32,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364648923] [2024-06-14 12:07:32,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364648923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:32,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:32,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883815970] [2024-06-14 12:07:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:32,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:32,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:33,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:07:33,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 606 transitions, 6723 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:33,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:33,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:07:33,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:35,908 INFO L124 PetriNetUnfolderBase]: 4946/8163 cut-off events. [2024-06-14 12:07:35,908 INFO L125 PetriNetUnfolderBase]: For 2735138/2735138 co-relation queries the response was YES. [2024-06-14 12:07:36,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88296 conditions, 8163 events. 4946/8163 cut-off events. For 2735138/2735138 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55496 event pairs, 1028 based on Foata normal form. 1/8161 useless extension candidates. Maximal degree in co-relation 88069. Up to 7668 conditions per place. [2024-06-14 12:07:36,057 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 606 selfloop transitions, 25 changer transitions 0/636 dead transitions. [2024-06-14 12:07:36,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 636 transitions, 8201 flow [2024-06-14 12:07:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:07:36,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:07:36,059 INFO L175 Difference]: Start difference. First operand has 475 places, 606 transitions, 6723 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:07:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 636 transitions, 8201 flow [2024-06-14 12:07:44,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 636 transitions, 8029 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:44,696 INFO L231 Difference]: Finished difference. Result has 477 places, 609 transitions, 6761 flow [2024-06-14 12:07:44,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6551, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6761, PETRI_PLACES=477, PETRI_TRANSITIONS=609} [2024-06-14 12:07:44,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 432 predicate places. [2024-06-14 12:07:44,697 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 609 transitions, 6761 flow [2024-06-14 12:07:44,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:44,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:44,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:44,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 12:07:44,697 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:44,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1070523218, now seen corresponding path program 1 times [2024-06-14 12:07:44,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:44,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062800340] [2024-06-14 12:07:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:45,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062800340] [2024-06-14 12:07:45,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062800340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:45,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:45,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:45,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109653462] [2024-06-14 12:07:45,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:45,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:45,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:45,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 609 transitions, 6761 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 12:07:45,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:45,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:45,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:48,871 INFO L124 PetriNetUnfolderBase]: 4731/7878 cut-off events. [2024-06-14 12:07:48,871 INFO L125 PetriNetUnfolderBase]: For 2785610/2785623 co-relation queries the response was YES. [2024-06-14 12:07:48,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87428 conditions, 7878 events. 4731/7878 cut-off events. For 2785610/2785623 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 54303 event pairs, 965 based on Foata normal form. 4/7787 useless extension candidates. Maximal degree in co-relation 87200. Up to 7190 conditions per place. [2024-06-14 12:07:49,030 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 565 selfloop transitions, 20 changer transitions 0/639 dead transitions. [2024-06-14 12:07:49,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 639 transitions, 8103 flow [2024-06-14 12:07:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:07:49,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 12:07:49,031 INFO L175 Difference]: Start difference. First operand has 477 places, 609 transitions, 6761 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:07:49,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 639 transitions, 8103 flow [2024-06-14 12:07:58,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 639 transitions, 7915 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:58,434 INFO L231 Difference]: Finished difference. Result has 479 places, 612 transitions, 6729 flow [2024-06-14 12:07:58,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6573, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6729, PETRI_PLACES=479, PETRI_TRANSITIONS=612} [2024-06-14 12:07:58,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 434 predicate places. [2024-06-14 12:07:58,435 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 612 transitions, 6729 flow [2024-06-14 12:07:58,435 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 12:07:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:58,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 12:07:58,436 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 39311276, now seen corresponding path program 2 times [2024-06-14 12:07:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444524969] [2024-06-14 12:07:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444524969] [2024-06-14 12:07:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444524969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:59,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347106373] [2024-06-14 12:07:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:59,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:59,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:07:59,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 612 transitions, 6729 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 12:07:59,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:59,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:07:59,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:02,484 INFO L124 PetriNetUnfolderBase]: 4736/7885 cut-off events. [2024-06-14 12:08:02,484 INFO L125 PetriNetUnfolderBase]: For 2817786/2817799 co-relation queries the response was YES. [2024-06-14 12:08:02,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88044 conditions, 7885 events. 4736/7885 cut-off events. For 2817786/2817799 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 54300 event pairs, 965 based on Foata normal form. 4/7794 useless extension candidates. Maximal degree in co-relation 87815. Up to 7191 conditions per place. [2024-06-14 12:08:02,640 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 563 selfloop transitions, 26 changer transitions 0/643 dead transitions. [2024-06-14 12:08:02,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 643 transitions, 8087 flow [2024-06-14 12:08:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:08:02,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 12:08:02,641 INFO L175 Difference]: Start difference. First operand has 479 places, 612 transitions, 6729 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:08:02,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 643 transitions, 8087 flow Killed by 15