./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix033.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix033.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix033.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-7724a2d-m [2024-06-27 20:17:17,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:17:17,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:17:17,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:17:17,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:17:17,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:17:17,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:17:17,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:17:17,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:17:17,626 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:17:17,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:17:17,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:17:17,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:17:17,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:17:17,627 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:17:17,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:17:17,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:17:17,628 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:17:17,629 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:17:17,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:17:17,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:17:17,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:17:17,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:17:17,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:17:17,634 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:17:17,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:17:17,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:17:17,635 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:17:17,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:17:17,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:17:17,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:17:17,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:17:17,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:17:17,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:17:17,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:17:17,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:17:17,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:17:17,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:17:17,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:17:17,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:17:17,638 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:17:17,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:17:17,639 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:17:17,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:17:17,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:17:17,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:17:17,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:17:17,879 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:17:17,879 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:17:17,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix033.opt.yml/witness.yml [2024-06-27 20:17:18,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:17:18,093 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:17:18,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-27 20:17:19,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:17:19,258 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:17:19,259 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-27 20:17:19,270 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cb56f1b/8c3b895170cc46d0b467b2e4cb62f86e/FLAG54125420b [2024-06-27 20:17:19,280 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cb56f1b/8c3b895170cc46d0b467b2e4cb62f86e [2024-06-27 20:17:19,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:17:19,281 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:17:19,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:17:19,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:17:19,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:17:19,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:17:18" (1/2) ... [2024-06-27 20:17:19,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f705d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:19, skipping insertion in model container [2024-06-27 20:17:19,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:17:18" (1/2) ... [2024-06-27 20:17:19,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49547133 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:17:19, skipping insertion in model container [2024-06-27 20:17:19,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:17:19" (2/2) ... [2024-06-27 20:17:19,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f705d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19, skipping insertion in model container [2024-06-27 20:17:19,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:17:19" (2/2) ... [2024-06-27 20:17:19,289 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:17:19,371 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:17:19,372 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-27 20:17:19,372 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-27 20:17:19,373 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-27 20:17:19,373 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:17:19,373 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-27 20:17:19,409 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:17:19,797 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:17:19,807 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:17:19,933 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:17:19,972 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:17:19,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19 WrapperNode [2024-06-27 20:17:19,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:17:19,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:17:19,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:17:19,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:17:19,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,038 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-27 20:17:20,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:17:20,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:17:20,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:17:20,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:17:20,048 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,078 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]. [2024-06-27 20:17:20,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,110 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:17:20,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:17:20,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:17:20,114 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:17:20,114 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (1/1) ... [2024-06-27 20:17:20,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:17:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:17:20,136 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) [2024-06-27 20:17:20,169 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 [2024-06-27 20:17:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:17:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:17:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:17:20,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:17:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:17:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:17:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:17:20,193 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:17:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:17:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:17:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:17:20,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:17:20,195 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:17:20,308 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:17:20,309 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:17:20,568 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:17:20,568 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:17:20,689 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:17:20,689 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:17:20,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:17:20 BoogieIcfgContainer [2024-06-27 20:17:20,690 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:17:20,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:17:20,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:17:20,697 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:17:20,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:17:18" (1/4) ... [2024-06-27 20:17:20,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff26e14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:17:20, skipping insertion in model container [2024-06-27 20:17:20,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:17:19" (2/4) ... [2024-06-27 20:17:20,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff26e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:17:20, skipping insertion in model container [2024-06-27 20:17:20,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:17:19" (3/4) ... [2024-06-27 20:17:20,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff26e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:17:20, skipping insertion in model container [2024-06-27 20:17:20,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:17:20" (4/4) ... [2024-06-27 20:17:20,701 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033.opt.i [2024-06-27 20:17:20,713 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:17:20,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:17:20,714 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:17:20,756 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:17:20,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:17:20,810 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 20:17:20,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:17:20,812 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. [2024-06-27 20:17:20,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:17:20,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 20:17:20,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:17:20,833 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;@32605a26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:17:20,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:17:20,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:17:20,839 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:17:20,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:17:20,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:20,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:17:20,840 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)] === [2024-06-27 20:17:20,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash 368421363, now seen corresponding path program 1 times [2024-06-27 20:17:20,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:20,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607654647] [2024-06-27 20:17:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:20,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607654647] [2024-06-27 20:17:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607654647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:21,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:21,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:17:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128738919] [2024-06-27 20:17:21,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:17:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:17:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:17:22,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 20:17:22,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:22,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:22,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 20:17:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:22,335 INFO L124 PetriNetUnfolderBase]: 1359/2199 cut-off events. [2024-06-27 20:17:22,336 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:17:22,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 2199 events. 1359/2199 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11527 event pairs, 941 based on Foata normal form. 1/2116 useless extension candidates. Maximal degree in co-relation 4301. Up to 2029 conditions per place. [2024-06-27 20:17:22,349 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:17:22,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-27 20:17:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:17:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:17:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-27 20:17:22,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-27 20:17:22,359 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-27 20:17:22,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-27 20:17:22,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:22,362 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 20:17:22,364 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} [2024-06-27 20:17:22,366 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 20:17:22,366 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 20:17:22,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:22,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:22,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:22,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:17:22,367 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)] === [2024-06-27 20:17:22,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1865755786, now seen corresponding path program 1 times [2024-06-27 20:17:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:22,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376796075] [2024-06-27 20:17:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:22,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:23,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:23,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376796075] [2024-06-27 20:17:23,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376796075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:23,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:23,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:17:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815538305] [2024-06-27 20:17:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:23,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:17:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:17:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:17:23,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:17:23,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:23,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:23,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:17:23,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:23,301 INFO L124 PetriNetUnfolderBase]: 1560/2437 cut-off events. [2024-06-27 20:17:23,301 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-27 20:17:23,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 2437 events. 1560/2437 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12451 event pairs, 930 based on Foata normal form. 3/2405 useless extension candidates. Maximal degree in co-relation 5441. Up to 2302 conditions per place. [2024-06-27 20:17:23,313 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 20:17:23,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-27 20:17:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:17:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:17:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-27 20:17:23,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-27 20:17:23,315 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-27 20:17:23,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-27 20:17:23,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:17:23,317 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 20:17:23,317 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} [2024-06-27 20:17:23,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 20:17:23,318 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 20:17:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:23,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:23,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:17:23,319 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)] === [2024-06-27 20:17:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2003855482, now seen corresponding path program 1 times [2024-06-27 20:17:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:23,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453872207] [2024-06-27 20:17:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:23,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453872207] [2024-06-27 20:17:23,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453872207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:23,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:23,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:17:23,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634927040] [2024-06-27 20:17:23,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:23,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:17:23,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:23,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:17:23,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:17:24,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:17:24,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:24,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:24,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:17:24,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:24,309 INFO L124 PetriNetUnfolderBase]: 1568/2497 cut-off events. [2024-06-27 20:17:24,309 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2024-06-27 20:17:24,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2497 events. 1568/2497 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13125 event pairs, 669 based on Foata normal form. 5/2485 useless extension candidates. Maximal degree in co-relation 6116. Up to 2248 conditions per place. [2024-06-27 20:17:24,320 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 53 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-27 20:17:24,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 400 flow [2024-06-27 20:17:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 20:17:24,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-06-27 20:17:24,322 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 138 transitions. [2024-06-27 20:17:24,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 400 flow [2024-06-27 20:17:24,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:17:24,325 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-27 20:17:24,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-27 20:17:24,326 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-27 20:17:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-27 20:17:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:24,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:24,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:24,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:17:24,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:24,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1875696655, now seen corresponding path program 1 times [2024-06-27 20:17:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994718996] [2024-06-27 20:17:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:24,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994718996] [2024-06-27 20:17:25,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994718996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:25,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:25,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:25,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537044167] [2024-06-27 20:17:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:25,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:25,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:17:25,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 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) [2024-06-27 20:17:25,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:25,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:17:25,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:25,625 INFO L124 PetriNetUnfolderBase]: 1580/2517 cut-off events. [2024-06-27 20:17:25,625 INFO L125 PetriNetUnfolderBase]: For 3179/3181 co-relation queries the response was YES. [2024-06-27 20:17:25,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7274 conditions, 2517 events. 1580/2517 cut-off events. For 3179/3181 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13210 event pairs, 481 based on Foata normal form. 12/2512 useless extension candidates. Maximal degree in co-relation 7257. Up to 2216 conditions per place. [2024-06-27 20:17:25,638 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 57 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-27 20:17:25,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 503 flow [2024-06-27 20:17:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:17:25,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-27 20:17:25,642 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:17:25,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 503 flow [2024-06-27 20:17:25,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 495 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:17:25,648 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-27 20:17:25,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 20:17:25,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-27 20:17:25,650 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-27 20:17:25,650 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) [2024-06-27 20:17:25,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:25,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:25,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:17:25,651 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)] === [2024-06-27 20:17:25,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1953014575, now seen corresponding path program 1 times [2024-06-27 20:17:25,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:25,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900024591] [2024-06-27 20:17:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:26,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:26,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900024591] [2024-06-27 20:17:26,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900024591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:26,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:26,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408581129] [2024-06-27 20:17:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:26,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:26,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:26,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:26,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:26,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:26,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:26,597 INFO L124 PetriNetUnfolderBase]: 1368/2246 cut-off events. [2024-06-27 20:17:26,597 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-27 20:17:26,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 2246 events. 1368/2246 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12065 event pairs, 562 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 6996. Up to 2036 conditions per place. [2024-06-27 20:17:26,611 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-27 20:17:26,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 439 flow [2024-06-27 20:17:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 20:17:26,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:17:26,614 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 5 states and 110 transitions. [2024-06-27 20:17:26,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 439 flow [2024-06-27 20:17:26,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:26,620 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 271 flow [2024-06-27 20:17:26,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 20:17:26,622 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-27 20:17:26,622 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 271 flow [2024-06-27 20:17:26,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:26,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:26,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:17:26,626 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)] === [2024-06-27 20:17:26,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash 412930851, now seen corresponding path program 1 times [2024-06-27 20:17:26,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:26,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523294729] [2024-06-27 20:17:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:26,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523294729] [2024-06-27 20:17:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523294729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457374986] [2024-06-27 20:17:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:27,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:27,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:27,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:27,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:27,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:27,846 INFO L124 PetriNetUnfolderBase]: 1606/2615 cut-off events. [2024-06-27 20:17:27,846 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-27 20:17:27,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8115 conditions, 2615 events. 1606/2615 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13935 event pairs, 676 based on Foata normal form. 2/2594 useless extension candidates. Maximal degree in co-relation 8092. Up to 2373 conditions per place. [2024-06-27 20:17:27,869 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-27 20:17:27,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 457 flow [2024-06-27 20:17:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 20:17:27,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-27 20:17:27,870 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 271 flow. Second operand 6 states and 125 transitions. [2024-06-27 20:17:27,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 457 flow [2024-06-27 20:17:27,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 435 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:27,876 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 303 flow [2024-06-27 20:17:27,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-27 20:17:27,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-27 20:17:27,878 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 303 flow [2024-06-27 20:17:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:27,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:27,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:27,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:17:27,879 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)] === [2024-06-27 20:17:27,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash -60128702, now seen corresponding path program 1 times [2024-06-27 20:17:27,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:27,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310754138] [2024-06-27 20:17:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:27,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:28,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:28,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310754138] [2024-06-27 20:17:28,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310754138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:28,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:28,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:28,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461438937] [2024-06-27 20:17:28,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:28,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:28,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:28,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:28,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:28,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:28,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:29,098 INFO L124 PetriNetUnfolderBase]: 1746/2777 cut-off events. [2024-06-27 20:17:29,098 INFO L125 PetriNetUnfolderBase]: For 8534/8538 co-relation queries the response was YES. [2024-06-27 20:17:29,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9396 conditions, 2777 events. 1746/2777 cut-off events. For 8534/8538 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14611 event pairs, 726 based on Foata normal form. 8/2773 useless extension candidates. Maximal degree in co-relation 9373. Up to 2505 conditions per place. [2024-06-27 20:17:29,112 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 53 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 20:17:29,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 543 flow [2024-06-27 20:17:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 20:17:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-27 20:17:29,114 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 303 flow. Second operand 6 states and 134 transitions. [2024-06-27 20:17:29,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 543 flow [2024-06-27 20:17:29,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 513 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:29,119 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 345 flow [2024-06-27 20:17:29,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=273, 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=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-27 20:17:29,121 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-27 20:17:29,121 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 345 flow [2024-06-27 20:17:29,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:29,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:29,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:17:29,122 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)] === [2024-06-27 20:17:29,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -53665202, now seen corresponding path program 2 times [2024-06-27 20:17:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:29,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478009961] [2024-06-27 20:17:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:29,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:29,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478009961] [2024-06-27 20:17:29,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478009961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:29,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:29,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791959815] [2024-06-27 20:17:29,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:29,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:29,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:29,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:29,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:29,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:29,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:30,441 INFO L124 PetriNetUnfolderBase]: 1734/2750 cut-off events. [2024-06-27 20:17:30,441 INFO L125 PetriNetUnfolderBase]: For 10309/10309 co-relation queries the response was YES. [2024-06-27 20:17:30,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 2750 events. 1734/2750 cut-off events. For 10309/10309 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14424 event pairs, 740 based on Foata normal form. 2/2739 useless extension candidates. Maximal degree in co-relation 9608. Up to 2489 conditions per place. [2024-06-27 20:17:30,469 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 47 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-27 20:17:30,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 517 flow [2024-06-27 20:17:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 20:17:30,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 20:17:30,481 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 345 flow. Second operand 6 states and 130 transitions. [2024-06-27 20:17:30,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 517 flow [2024-06-27 20:17:30,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 488 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:30,487 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 364 flow [2024-06-27 20:17:30,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-27 20:17:30,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-27 20:17:30,489 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 364 flow [2024-06-27 20:17:30,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:30,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:30,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:30,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:17:30,489 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)] === [2024-06-27 20:17:30,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash -998329876, now seen corresponding path program 1 times [2024-06-27 20:17:30,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:30,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744265359] [2024-06-27 20:17:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:31,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744265359] [2024-06-27 20:17:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744265359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:31,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063008508] [2024-06-27 20:17:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:31,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:31,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:31,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:31,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:31,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:31,863 INFO L124 PetriNetUnfolderBase]: 1590/2610 cut-off events. [2024-06-27 20:17:31,863 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-27 20:17:31,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9112 conditions, 2610 events. 1590/2610 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14019 event pairs, 634 based on Foata normal form. 4/2603 useless extension candidates. Maximal degree in co-relation 9087. Up to 2330 conditions per place. [2024-06-27 20:17:31,876 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-27 20:17:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 588 flow [2024-06-27 20:17:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:17:31,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 20:17:31,878 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 364 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:17:31,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 588 flow [2024-06-27 20:17:31,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 523 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:31,887 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 363 flow [2024-06-27 20:17:31,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=363, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-27 20:17:31,888 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-27 20:17:31,888 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 363 flow [2024-06-27 20:17:31,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:31,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:31,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:31,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:17:31,888 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)] === [2024-06-27 20:17:31,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1060831230, now seen corresponding path program 1 times [2024-06-27 20:17:31,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984074707] [2024-06-27 20:17:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:32,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:32,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984074707] [2024-06-27 20:17:32,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984074707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:32,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:32,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026585916] [2024-06-27 20:17:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:32,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:32,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:32,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:32,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:32,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:33,251 INFO L124 PetriNetUnfolderBase]: 1856/2895 cut-off events. [2024-06-27 20:17:33,251 INFO L125 PetriNetUnfolderBase]: For 14786/14790 co-relation queries the response was YES. [2024-06-27 20:17:33,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10876 conditions, 2895 events. 1856/2895 cut-off events. For 14786/14790 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14760 event pairs, 731 based on Foata normal form. 8/2890 useless extension candidates. Maximal degree in co-relation 10850. Up to 2601 conditions per place. [2024-06-27 20:17:33,270 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 63 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-27 20:17:33,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 693 flow [2024-06-27 20:17:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 20:17:33,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 20:17:33,272 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 363 flow. Second operand 7 states and 150 transitions. [2024-06-27 20:17:33,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 693 flow [2024-06-27 20:17:33,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 653 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:33,279 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 442 flow [2024-06-27 20:17:33,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-27 20:17:33,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-27 20:17:33,281 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 442 flow [2024-06-27 20:17:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:33,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:33,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:17:33,281 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)] === [2024-06-27 20:17:33,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1663619872, now seen corresponding path program 2 times [2024-06-27 20:17:33,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843808052] [2024-06-27 20:17:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843808052] [2024-06-27 20:17:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843808052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:33,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553538911] [2024-06-27 20:17:33,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:33,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:33,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:33,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:33,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:33,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:34,533 INFO L124 PetriNetUnfolderBase]: 1867/2907 cut-off events. [2024-06-27 20:17:34,533 INFO L125 PetriNetUnfolderBase]: For 18378/18378 co-relation queries the response was YES. [2024-06-27 20:17:34,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 2907 events. 1867/2907 cut-off events. For 18378/18378 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14829 event pairs, 745 based on Foata normal form. 2/2895 useless extension candidates. Maximal degree in co-relation 11718. Up to 2608 conditions per place. [2024-06-27 20:17:34,551 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 60 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-27 20:17:34,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 824 flow [2024-06-27 20:17:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 20:17:34,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 20:17:34,552 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 442 flow. Second operand 7 states and 150 transitions. [2024-06-27 20:17:34,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 824 flow [2024-06-27 20:17:34,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 788 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:34,561 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 542 flow [2024-06-27 20:17:34,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 20:17:34,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-27 20:17:34,562 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 542 flow [2024-06-27 20:17:34,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:34,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:34,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:17:34,563 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)] === [2024-06-27 20:17:34,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash -883462560, now seen corresponding path program 3 times [2024-06-27 20:17:34,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:34,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454898054] [2024-06-27 20:17:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:35,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454898054] [2024-06-27 20:17:35,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454898054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:35,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:35,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:35,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767778466] [2024-06-27 20:17:35,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:35,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:35,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:35,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:35,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:35,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:35,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:35,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:35,904 INFO L124 PetriNetUnfolderBase]: 1862/2900 cut-off events. [2024-06-27 20:17:35,904 INFO L125 PetriNetUnfolderBase]: For 21727/21727 co-relation queries the response was YES. [2024-06-27 20:17:35,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12205 conditions, 2900 events. 1862/2900 cut-off events. For 21727/21727 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14784 event pairs, 745 based on Foata normal form. 2/2888 useless extension candidates. Maximal degree in co-relation 12176. Up to 2605 conditions per place. [2024-06-27 20:17:35,920 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 57 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-27 20:17:35,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 820 flow [2024-06-27 20:17:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 20:17:35,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-27 20:17:35,922 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 542 flow. Second operand 7 states and 148 transitions. [2024-06-27 20:17:35,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 820 flow [2024-06-27 20:17:35,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 765 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 20:17:35,933 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 563 flow [2024-06-27 20:17:35,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-27 20:17:35,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-27 20:17:35,934 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 563 flow [2024-06-27 20:17:35,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:35,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:35,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:35,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:17:35,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:35,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:35,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1752323353, now seen corresponding path program 1 times [2024-06-27 20:17:35,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:35,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113903837] [2024-06-27 20:17:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:35,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:36,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:36,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113903837] [2024-06-27 20:17:36,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113903837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:36,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:36,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:36,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070031519] [2024-06-27 20:17:36,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:36,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:36,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:36,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:36,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:36,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:36,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:36,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:36,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:36,936 INFO L124 PetriNetUnfolderBase]: 1534/2560 cut-off events. [2024-06-27 20:17:36,936 INFO L125 PetriNetUnfolderBase]: For 20440/20440 co-relation queries the response was YES. [2024-06-27 20:17:36,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10683 conditions, 2560 events. 1534/2560 cut-off events. For 20440/20440 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13956 event pairs, 581 based on Foata normal form. 1/2548 useless extension candidates. Maximal degree in co-relation 10651. Up to 2252 conditions per place. [2024-06-27 20:17:36,987 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-06-27 20:17:36,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 753 flow [2024-06-27 20:17:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 20:17:36,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 20:17:36,988 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 563 flow. Second operand 5 states and 106 transitions. [2024-06-27 20:17:36,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 753 flow [2024-06-27 20:17:37,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 665 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:37,002 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 525 flow [2024-06-27 20:17:37,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-27 20:17:37,003 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-27 20:17:37,003 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 525 flow [2024-06-27 20:17:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:37,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:37,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:37,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:17:37,004 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)] === [2024-06-27 20:17:37,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1641438136, now seen corresponding path program 1 times [2024-06-27 20:17:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:37,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632511778] [2024-06-27 20:17:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:37,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632511778] [2024-06-27 20:17:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632511778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726907733] [2024-06-27 20:17:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:37,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:37,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 525 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) [2024-06-27 20:17:37,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:37,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:37,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:38,421 INFO L124 PetriNetUnfolderBase]: 1870/2921 cut-off events. [2024-06-27 20:17:38,422 INFO L125 PetriNetUnfolderBase]: For 27028/27032 co-relation queries the response was YES. [2024-06-27 20:17:38,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12838 conditions, 2921 events. 1870/2921 cut-off events. For 27028/27032 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14947 event pairs, 730 based on Foata normal form. 6/2927 useless extension candidates. Maximal degree in co-relation 12806. Up to 2613 conditions per place. [2024-06-27 20:17:38,439 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 67 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-27 20:17:38,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 883 flow [2024-06-27 20:17:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 20:17:38,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-27 20:17:38,440 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 525 flow. Second operand 7 states and 153 transitions. [2024-06-27 20:17:38,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 883 flow [2024-06-27 20:17:38,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 855 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:38,455 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 611 flow [2024-06-27 20:17:38,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=611, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-27 20:17:38,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-27 20:17:38,456 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 611 flow [2024-06-27 20:17:38,456 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) [2024-06-27 20:17:38,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:38,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:38,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:17:38,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:38,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1641432339, now seen corresponding path program 1 times [2024-06-27 20:17:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233376259] [2024-06-27 20:17:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:38,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233376259] [2024-06-27 20:17:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233376259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:39,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:39,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:39,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555593004] [2024-06-27 20:17:39,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:39,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:39,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:39,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:39,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 611 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:39,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:39,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:39,932 INFO L124 PetriNetUnfolderBase]: 1914/2996 cut-off events. [2024-06-27 20:17:39,932 INFO L125 PetriNetUnfolderBase]: For 31282/31286 co-relation queries the response was YES. [2024-06-27 20:17:39,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13498 conditions, 2996 events. 1914/2996 cut-off events. For 31282/31286 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15464 event pairs, 638 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 13465. Up to 2529 conditions per place. [2024-06-27 20:17:39,949 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 77 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-27 20:17:39,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1039 flow [2024-06-27 20:17:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 20:17:39,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-27 20:17:39,951 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 611 flow. Second operand 8 states and 174 transitions. [2024-06-27 20:17:39,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1039 flow [2024-06-27 20:17:39,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 928 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:39,975 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 653 flow [2024-06-27 20:17:39,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-27 20:17:39,977 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-27 20:17:39,977 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 653 flow [2024-06-27 20:17:39,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:39,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:39,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:17:39,978 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)] === [2024-06-27 20:17:39,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1949063480, now seen corresponding path program 2 times [2024-06-27 20:17:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:39,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924120299] [2024-06-27 20:17:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:39,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:40,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:40,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924120299] [2024-06-27 20:17:40,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924120299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:40,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:40,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:40,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877243837] [2024-06-27 20:17:40,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:40,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:40,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:40,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:40,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 653 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) [2024-06-27 20:17:40,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:40,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:40,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:41,300 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-27 20:17:41,300 INFO L125 PetriNetUnfolderBase]: For 35490/35492 co-relation queries the response was YES. [2024-06-27 20:17:41,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14355 conditions, 3017 events. 1925/3017 cut-off events. For 35490/35492 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15572 event pairs, 696 based on Foata normal form. 4/3021 useless extension candidates. Maximal degree in co-relation 14322. Up to 2689 conditions per place. [2024-06-27 20:17:41,314 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-27 20:17:41,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 1026 flow [2024-06-27 20:17:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 20:17:41,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837662337662338 [2024-06-27 20:17:41,317 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 653 flow. Second operand 7 states and 149 transitions. [2024-06-27 20:17:41,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 1026 flow [2024-06-27 20:17:41,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 977 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:41,339 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 720 flow [2024-06-27 20:17:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-27 20:17:41,339 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-27 20:17:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 720 flow [2024-06-27 20:17:41,340 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) [2024-06-27 20:17:41,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:41,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:41,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:17:41,341 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)] === [2024-06-27 20:17:41,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2017714575, now seen corresponding path program 2 times [2024-06-27 20:17:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:41,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475919229] [2024-06-27 20:17:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:42,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:42,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475919229] [2024-06-27 20:17:42,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475919229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:42,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:42,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:42,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770290670] [2024-06-27 20:17:42,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:42,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:42,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:42,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:42,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:42,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:42,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:42,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:42,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:42,893 INFO L124 PetriNetUnfolderBase]: 1947/3032 cut-off events. [2024-06-27 20:17:42,893 INFO L125 PetriNetUnfolderBase]: For 40337/40337 co-relation queries the response was YES. [2024-06-27 20:17:42,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14784 conditions, 3032 events. 1947/3032 cut-off events. For 40337/40337 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15499 event pairs, 662 based on Foata normal form. 4/3035 useless extension candidates. Maximal degree in co-relation 14749. Up to 2545 conditions per place. [2024-06-27 20:17:42,910 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 70 selfloop transitions, 52 changer transitions 0/128 dead transitions. [2024-06-27 20:17:42,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1228 flow [2024-06-27 20:17:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 20:17:42,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-27 20:17:42,911 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 720 flow. Second operand 8 states and 174 transitions. [2024-06-27 20:17:42,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1228 flow [2024-06-27 20:17:42,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1162 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:42,931 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 836 flow [2024-06-27 20:17:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-27 20:17:42,932 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-27 20:17:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 836 flow [2024-06-27 20:17:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:42,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:42,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:17:42,933 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)] === [2024-06-27 20:17:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 830631803, now seen corresponding path program 3 times [2024-06-27 20:17:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15789582] [2024-06-27 20:17:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:43,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15789582] [2024-06-27 20:17:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15789582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:43,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:43,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839084774] [2024-06-27 20:17:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:43,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:43,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:43,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 836 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:43,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:43,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:43,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:44,408 INFO L124 PetriNetUnfolderBase]: 1969/3069 cut-off events. [2024-06-27 20:17:44,408 INFO L125 PetriNetUnfolderBase]: For 45828/45828 co-relation queries the response was YES. [2024-06-27 20:17:44,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15504 conditions, 3069 events. 1969/3069 cut-off events. For 45828/45828 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15763 event pairs, 662 based on Foata normal form. 4/3072 useless extension candidates. Maximal degree in co-relation 15468. Up to 2554 conditions per place. [2024-06-27 20:17:44,425 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 73 selfloop transitions, 53 changer transitions 0/132 dead transitions. [2024-06-27 20:17:44,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1334 flow [2024-06-27 20:17:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 20:17:44,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2024-06-27 20:17:44,427 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 836 flow. Second operand 8 states and 175 transitions. [2024-06-27 20:17:44,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1334 flow [2024-06-27 20:17:44,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1240 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:44,458 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 896 flow [2024-06-27 20:17:44,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-27 20:17:44,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-27 20:17:44,459 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 896 flow [2024-06-27 20:17:44,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:44,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:44,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:44,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:17:44,460 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)] === [2024-06-27 20:17:44,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 969406344, now seen corresponding path program 3 times [2024-06-27 20:17:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7137370] [2024-06-27 20:17:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:44,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:45,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:45,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7137370] [2024-06-27 20:17:45,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7137370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:45,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:45,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757789433] [2024-06-27 20:17:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:45,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:45,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 896 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) [2024-06-27 20:17:45,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:45,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:45,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:45,908 INFO L124 PetriNetUnfolderBase]: 1964/3085 cut-off events. [2024-06-27 20:17:45,908 INFO L125 PetriNetUnfolderBase]: For 49465/49467 co-relation queries the response was YES. [2024-06-27 20:17:45,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15615 conditions, 3085 events. 1964/3085 cut-off events. For 49465/49467 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16033 event pairs, 722 based on Foata normal form. 4/3088 useless extension candidates. Maximal degree in co-relation 15577. Up to 2748 conditions per place. [2024-06-27 20:17:45,925 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 34 changer transitions 0/120 dead transitions. [2024-06-27 20:17:45,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 120 transitions, 1172 flow [2024-06-27 20:17:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:17:45,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:17:45,926 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 896 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:17:45,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 120 transitions, 1172 flow [2024-06-27 20:17:45,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 120 transitions, 1060 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:45,961 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 860 flow [2024-06-27 20:17:45,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-27 20:17:45,962 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-27 20:17:45,962 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 860 flow [2024-06-27 20:17:45,962 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) [2024-06-27 20:17:45,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:45,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:45,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:17:45,962 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)] === [2024-06-27 20:17:45,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash -32607059, now seen corresponding path program 4 times [2024-06-27 20:17:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:45,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487161148] [2024-06-27 20:17:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:46,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487161148] [2024-06-27 20:17:46,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487161148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:46,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:46,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:46,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217206200] [2024-06-27 20:17:46,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:46,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:46,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:46,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:46,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:46,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:47,512 INFO L124 PetriNetUnfolderBase]: 1954/3047 cut-off events. [2024-06-27 20:17:47,512 INFO L125 PetriNetUnfolderBase]: For 53325/53325 co-relation queries the response was YES. [2024-06-27 20:17:47,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15530 conditions, 3047 events. 1954/3047 cut-off events. For 53325/53325 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15661 event pairs, 658 based on Foata normal form. 4/3050 useless extension candidates. Maximal degree in co-relation 15491. Up to 2547 conditions per place. [2024-06-27 20:17:47,530 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 72 selfloop transitions, 52 changer transitions 0/130 dead transitions. [2024-06-27 20:17:47,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1252 flow [2024-06-27 20:17:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 20:17:47,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-27 20:17:47,532 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 860 flow. Second operand 8 states and 173 transitions. [2024-06-27 20:17:47,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1252 flow [2024-06-27 20:17:47,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1139 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:47,565 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 859 flow [2024-06-27 20:17:47,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2024-06-27 20:17:47,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-27 20:17:47,565 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 859 flow [2024-06-27 20:17:47,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:47,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:47,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:47,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:17:47,566 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:47,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1493783763, now seen corresponding path program 1 times [2024-06-27 20:17:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388599461] [2024-06-27 20:17:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:48,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:48,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388599461] [2024-06-27 20:17:48,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388599461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:48,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:48,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:48,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793555963] [2024-06-27 20:17:48,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:48,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:48,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:48,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:48,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:48,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:48,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:48,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:48,689 INFO L124 PetriNetUnfolderBase]: 1845/2972 cut-off events. [2024-06-27 20:17:48,690 INFO L125 PetriNetUnfolderBase]: For 56981/56981 co-relation queries the response was YES. [2024-06-27 20:17:48,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15391 conditions, 2972 events. 1845/2972 cut-off events. For 56981/56981 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15843 event pairs, 649 based on Foata normal form. 1/2973 useless extension candidates. Maximal degree in co-relation 15351. Up to 2703 conditions per place. [2024-06-27 20:17:48,708 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 88 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-27 20:17:48,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 1105 flow [2024-06-27 20:17:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 20:17:48,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:17:48,710 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 859 flow. Second operand 6 states and 118 transitions. [2024-06-27 20:17:48,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 1105 flow [2024-06-27 20:17:48,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 962 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:48,738 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 776 flow [2024-06-27 20:17:48,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-27 20:17:48,738 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-27 20:17:48,739 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 776 flow [2024-06-27 20:17:48,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:48,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:48,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:48,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:17:48,739 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)] === [2024-06-27 20:17:48,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -296189015, now seen corresponding path program 1 times [2024-06-27 20:17:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263322634] [2024-06-27 20:17:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:48,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:49,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263322634] [2024-06-27 20:17:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263322634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:49,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:49,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644593543] [2024-06-27 20:17:49,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:49,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:49,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:49,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:49,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:49,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:49,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:49,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:50,019 INFO L124 PetriNetUnfolderBase]: 1934/3071 cut-off events. [2024-06-27 20:17:50,020 INFO L125 PetriNetUnfolderBase]: For 71312/71314 co-relation queries the response was YES. [2024-06-27 20:17:50,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 3071 events. 1934/3071 cut-off events. For 71312/71314 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16354 event pairs, 486 based on Foata normal form. 6/3077 useless extension candidates. Maximal degree in co-relation 16808. Up to 2634 conditions per place. [2024-06-27 20:17:50,038 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 96 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-27 20:17:50,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1206 flow [2024-06-27 20:17:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 20:17:50,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-27 20:17:50,040 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 776 flow. Second operand 7 states and 153 transitions. [2024-06-27 20:17:50,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1206 flow [2024-06-27 20:17:50,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:50,071 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 843 flow [2024-06-27 20:17:50,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-27 20:17:50,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-27 20:17:50,072 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 843 flow [2024-06-27 20:17:50,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:50,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:50,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:50,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:17:50,072 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)] === [2024-06-27 20:17:50,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:50,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1666993243, now seen corresponding path program 2 times [2024-06-27 20:17:50,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:50,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146011367] [2024-06-27 20:17:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:50,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:50,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146011367] [2024-06-27 20:17:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146011367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:50,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957523023] [2024-06-27 20:17:50,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:50,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:50,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:50,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:50,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:50,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:50,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:51,429 INFO L124 PetriNetUnfolderBase]: 1922/3050 cut-off events. [2024-06-27 20:17:51,429 INFO L125 PetriNetUnfolderBase]: For 77303/77305 co-relation queries the response was YES. [2024-06-27 20:17:51,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 3050 events. 1922/3050 cut-off events. For 77303/77305 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16154 event pairs, 640 based on Foata normal form. 6/3056 useless extension candidates. Maximal degree in co-relation 17179. Up to 2695 conditions per place. [2024-06-27 20:17:51,447 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 95 selfloop transitions, 21 changer transitions 0/131 dead transitions. [2024-06-27 20:17:51,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1133 flow [2024-06-27 20:17:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 20:17:51,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-27 20:17:51,449 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 843 flow. Second operand 7 states and 151 transitions. [2024-06-27 20:17:51,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1133 flow [2024-06-27 20:17:51,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1078 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:51,506 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 837 flow [2024-06-27 20:17:51,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-27 20:17:51,507 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-27 20:17:51,507 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 837 flow [2024-06-27 20:17:51,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:51,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:51,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:51,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:17:51,508 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)] === [2024-06-27 20:17:51,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1551697113, now seen corresponding path program 1 times [2024-06-27 20:17:51,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:51,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958399963] [2024-06-27 20:17:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:52,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:52,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958399963] [2024-06-27 20:17:52,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958399963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:52,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:52,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:52,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715970802] [2024-06-27 20:17:52,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:52,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:52,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:52,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:52,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 837 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) [2024-06-27 20:17:52,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:52,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:52,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:53,168 INFO L124 PetriNetUnfolderBase]: 2053/3201 cut-off events. [2024-06-27 20:17:53,168 INFO L125 PetriNetUnfolderBase]: For 84058/84060 co-relation queries the response was YES. [2024-06-27 20:17:53,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18133 conditions, 3201 events. 2053/3201 cut-off events. For 84058/84060 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16648 event pairs, 626 based on Foata normal form. 4/3205 useless extension candidates. Maximal degree in co-relation 18089. Up to 2649 conditions per place. [2024-06-27 20:17:53,190 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 84 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-27 20:17:53,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1327 flow [2024-06-27 20:17:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 20:17:53,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-27 20:17:53,192 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 837 flow. Second operand 8 states and 178 transitions. [2024-06-27 20:17:53,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1327 flow [2024-06-27 20:17:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1277 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:53,258 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 943 flow [2024-06-27 20:17:53,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-27 20:17:53,259 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-27 20:17:53,259 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 943 flow [2024-06-27 20:17:53,259 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) [2024-06-27 20:17:53,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:53,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:17:53,259 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)] === [2024-06-27 20:17:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1551517623, now seen corresponding path program 2 times [2024-06-27 20:17:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466675864] [2024-06-27 20:17:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:53,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:53,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466675864] [2024-06-27 20:17:53,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466675864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:53,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:53,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:53,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680371196] [2024-06-27 20:17:53,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:53,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:53,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:53,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 943 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) [2024-06-27 20:17:53,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:53,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:53,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:54,685 INFO L124 PetriNetUnfolderBase]: 2107/3294 cut-off events. [2024-06-27 20:17:54,685 INFO L125 PetriNetUnfolderBase]: For 92778/92780 co-relation queries the response was YES. [2024-06-27 20:17:54,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19139 conditions, 3294 events. 2107/3294 cut-off events. For 92778/92780 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17249 event pairs, 628 based on Foata normal form. 4/3298 useless extension candidates. Maximal degree in co-relation 19094. Up to 2695 conditions per place. [2024-06-27 20:17:54,704 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 57 changer transitions 0/151 dead transitions. [2024-06-27 20:17:54,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1585 flow [2024-06-27 20:17:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 20:17:54,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:17:54,705 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 943 flow. Second operand 8 states and 176 transitions. [2024-06-27 20:17:54,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1585 flow [2024-06-27 20:17:54,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1400 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:54,757 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 969 flow [2024-06-27 20:17:54,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-27 20:17:54,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-27 20:17:54,758 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 969 flow [2024-06-27 20:17:54,758 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) [2024-06-27 20:17:54,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:54,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:54,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:17:54,758 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:54,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash 655199737, now seen corresponding path program 3 times [2024-06-27 20:17:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:54,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817482129] [2024-06-27 20:17:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:54,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817482129] [2024-06-27 20:17:55,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817482129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:55,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:55,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:55,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818577047] [2024-06-27 20:17:55,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:55,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:55,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:55,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:55,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 969 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) [2024-06-27 20:17:55,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:55,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:55,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:56,337 INFO L124 PetriNetUnfolderBase]: 2097/3280 cut-off events. [2024-06-27 20:17:56,337 INFO L125 PetriNetUnfolderBase]: For 97813/97815 co-relation queries the response was YES. [2024-06-27 20:17:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19158 conditions, 3280 events. 2097/3280 cut-off events. For 97813/97815 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17175 event pairs, 633 based on Foata normal form. 4/3284 useless extension candidates. Maximal degree in co-relation 19113. Up to 2687 conditions per place. [2024-06-27 20:17:56,357 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-27 20:17:56,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1431 flow [2024-06-27 20:17:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 20:17:56,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:17:56,359 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 969 flow. Second operand 8 states and 176 transitions. [2024-06-27 20:17:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1431 flow [2024-06-27 20:17:56,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1322 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:56,407 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 980 flow [2024-06-27 20:17:56,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2024-06-27 20:17:56,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-27 20:17:56,408 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 980 flow [2024-06-27 20:17:56,408 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) [2024-06-27 20:17:56,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:56,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:56,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:17:56,408 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:56,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash -950690736, now seen corresponding path program 1 times [2024-06-27 20:17:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002222790] [2024-06-27 20:17:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002222790] [2024-06-27 20:17:56,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002222790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:56,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:56,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:56,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899117080] [2024-06-27 20:17:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:57,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:57,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 980 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:57,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:57,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:57,521 INFO L124 PetriNetUnfolderBase]: 2018/3202 cut-off events. [2024-06-27 20:17:57,522 INFO L125 PetriNetUnfolderBase]: For 103698/103698 co-relation queries the response was YES. [2024-06-27 20:17:57,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19109 conditions, 3202 events. 2018/3202 cut-off events. For 103698/103698 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17088 event pairs, 650 based on Foata normal form. 1/3203 useless extension candidates. Maximal degree in co-relation 19063. Up to 2897 conditions per place. [2024-06-27 20:17:57,544 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2024-06-27 20:17:57,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1286 flow [2024-06-27 20:17:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 20:17:57,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 20:17:57,546 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 980 flow. Second operand 6 states and 124 transitions. [2024-06-27 20:17:57,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1286 flow [2024-06-27 20:17:57,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1161 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:57,608 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 917 flow [2024-06-27 20:17:57,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=917, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-27 20:17:57,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-27 20:17:57,609 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 917 flow [2024-06-27 20:17:57,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:57,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:57,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:17:57,610 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)] === [2024-06-27 20:17:57,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1404323913, now seen corresponding path program 4 times [2024-06-27 20:17:57,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:57,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361247676] [2024-06-27 20:17:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361247676] [2024-06-27 20:17:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361247676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:58,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:58,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:58,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459052810] [2024-06-27 20:17:58,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:58,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:58,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:58,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:58,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 917 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) [2024-06-27 20:17:58,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:58,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:58,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:59,123 INFO L124 PetriNetUnfolderBase]: 2150/3356 cut-off events. [2024-06-27 20:17:59,123 INFO L125 PetriNetUnfolderBase]: For 111581/111583 co-relation queries the response was YES. [2024-06-27 20:17:59,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20063 conditions, 3356 events. 2150/3356 cut-off events. For 111581/111583 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17584 event pairs, 657 based on Foata normal form. 6/3361 useless extension candidates. Maximal degree in co-relation 20016. Up to 2739 conditions per place. [2024-06-27 20:17:59,145 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 60 changer transitions 0/151 dead transitions. [2024-06-27 20:17:59,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 1413 flow [2024-06-27 20:17:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 20:17:59,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:17:59,147 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 917 flow. Second operand 8 states and 168 transitions. [2024-06-27 20:17:59,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 1413 flow [2024-06-27 20:17:59,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1373 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:59,209 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1043 flow [2024-06-27 20:17:59,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-27 20:17:59,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-27 20:17:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1043 flow [2024-06-27 20:17:59,210 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) [2024-06-27 20:17:59,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:59,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:59,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:17:59,210 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)] === [2024-06-27 20:17:59,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash -782916475, now seen corresponding path program 5 times [2024-06-27 20:17:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839013973] [2024-06-27 20:17:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:59,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839013973] [2024-06-27 20:17:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839013973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:59,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120301347] [2024-06-27 20:17:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:00,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:00,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1043 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) [2024-06-27 20:18:00,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:00,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:00,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:00,770 INFO L124 PetriNetUnfolderBase]: 2172/3393 cut-off events. [2024-06-27 20:18:00,770 INFO L125 PetriNetUnfolderBase]: For 120225/120227 co-relation queries the response was YES. [2024-06-27 20:18:00,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20811 conditions, 3393 events. 2172/3393 cut-off events. For 120225/120227 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17867 event pairs, 652 based on Foata normal form. 6/3398 useless extension candidates. Maximal degree in co-relation 20763. Up to 2758 conditions per place. [2024-06-27 20:18:00,794 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-27 20:18:00,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 155 transitions, 1559 flow [2024-06-27 20:18:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 20:18:00,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-27 20:18:00,795 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1043 flow. Second operand 8 states and 171 transitions. [2024-06-27 20:18:00,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 155 transitions, 1559 flow [2024-06-27 20:18:00,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1433 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:00,879 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1087 flow [2024-06-27 20:18:00,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-27 20:18:00,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-27 20:18:00,880 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1087 flow [2024-06-27 20:18:00,881 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) [2024-06-27 20:18:00,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:00,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:00,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:18:00,881 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)] === [2024-06-27 20:18:00,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:00,881 INFO L85 PathProgramCache]: Analyzing trace with hash -782922985, now seen corresponding path program 6 times [2024-06-27 20:18:00,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:00,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315735216] [2024-06-27 20:18:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:01,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315735216] [2024-06-27 20:18:01,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315735216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:01,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:01,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963699589] [2024-06-27 20:18:01,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:01,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:01,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:01,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1087 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) [2024-06-27 20:18:01,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:01,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:01,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:02,440 INFO L124 PetriNetUnfolderBase]: 2162/3379 cut-off events. [2024-06-27 20:18:02,440 INFO L125 PetriNetUnfolderBase]: For 126609/126611 co-relation queries the response was YES. [2024-06-27 20:18:02,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20840 conditions, 3379 events. 2162/3379 cut-off events. For 126609/126611 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17707 event pairs, 650 based on Foata normal form. 6/3384 useless extension candidates. Maximal degree in co-relation 20791. Up to 2750 conditions per place. [2024-06-27 20:18:02,461 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 86 selfloop transitions, 60 changer transitions 0/153 dead transitions. [2024-06-27 20:18:02,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 153 transitions, 1445 flow [2024-06-27 20:18:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 20:18:02,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:18:02,463 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1087 flow. Second operand 8 states and 168 transitions. [2024-06-27 20:18:02,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 153 transitions, 1445 flow [2024-06-27 20:18:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 153 transitions, 1254 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:02,530 INFO L231 Difference]: Finished difference. Result has 115 places, 126 transitions, 1024 flow [2024-06-27 20:18:02,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1024, PETRI_PLACES=115, PETRI_TRANSITIONS=126} [2024-06-27 20:18:02,531 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-27 20:18:02,531 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 126 transitions, 1024 flow [2024-06-27 20:18:02,531 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) [2024-06-27 20:18:02,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:02,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:02,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:18:02,532 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:02,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash -937358256, now seen corresponding path program 2 times [2024-06-27 20:18:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:02,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603720940] [2024-06-27 20:18:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603720940] [2024-06-27 20:18:03,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603720940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:03,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:03,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:03,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876511597] [2024-06-27 20:18:03,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:03,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:03,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:03,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:03,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 126 transitions, 1024 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:03,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:03,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:03,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:03,834 INFO L124 PetriNetUnfolderBase]: 2045/3261 cut-off events. [2024-06-27 20:18:03,835 INFO L125 PetriNetUnfolderBase]: For 131999/132005 co-relation queries the response was YES. [2024-06-27 20:18:03,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20531 conditions, 3261 events. 2045/3261 cut-off events. For 131999/132005 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17516 event pairs, 660 based on Foata normal form. 7/3268 useless extension candidates. Maximal degree in co-relation 20481. Up to 2933 conditions per place. [2024-06-27 20:18:03,860 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 107 selfloop transitions, 16 changer transitions 0/138 dead transitions. [2024-06-27 20:18:03,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 1326 flow [2024-06-27 20:18:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:18:03,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:03,861 INFO L175 Difference]: Start difference. First operand has 115 places, 126 transitions, 1024 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:18:03,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 1326 flow [2024-06-27 20:18:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1169 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:03,930 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 945 flow [2024-06-27 20:18:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=945, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-27 20:18:03,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 20:18:03,931 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 945 flow [2024-06-27 20:18:03,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:03,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:03,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:18:03,932 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -944970864, now seen corresponding path program 1 times [2024-06-27 20:18:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207813958] [2024-06-27 20:18:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:03,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207813958] [2024-06-27 20:18:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207813958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:04,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:04,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:04,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82792260] [2024-06-27 20:18:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:04,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:04,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:04,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:18:04,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 945 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:04,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:04,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:18:04,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:05,004 INFO L124 PetriNetUnfolderBase]: 1821/3018 cut-off events. [2024-06-27 20:18:05,005 INFO L125 PetriNetUnfolderBase]: For 120404/120404 co-relation queries the response was YES. [2024-06-27 20:18:05,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18636 conditions, 3018 events. 1821/3018 cut-off events. For 120404/120404 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16799 event pairs, 560 based on Foata normal form. 1/3019 useless extension candidates. Maximal degree in co-relation 18585. Up to 2618 conditions per place. [2024-06-27 20:18:05,024 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 117 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-27 20:18:05,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1261 flow [2024-06-27 20:18:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 20:18:05,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:18:05,032 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 945 flow. Second operand 6 states and 126 transitions. [2024-06-27 20:18:05,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1261 flow [2024-06-27 20:18:05,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1205 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:05,085 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 953 flow [2024-06-27 20:18:05,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-27 20:18:05,087 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-27 20:18:05,087 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 953 flow [2024-06-27 20:18:05,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:05,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:05,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:05,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:18:05,087 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)] === [2024-06-27 20:18:05,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1404631743, now seen corresponding path program 1 times [2024-06-27 20:18:05,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964904560] [2024-06-27 20:18:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:06,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964904560] [2024-06-27 20:18:06,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964904560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:06,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:06,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200980568] [2024-06-27 20:18:06,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:06,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:06,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:06,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 953 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:06,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:06,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:06,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:07,265 INFO L124 PetriNetUnfolderBase]: 1913/3104 cut-off events. [2024-06-27 20:18:07,266 INFO L125 PetriNetUnfolderBase]: For 126859/126859 co-relation queries the response was YES. [2024-06-27 20:18:07,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19362 conditions, 3104 events. 1913/3104 cut-off events. For 126859/126859 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16839 event pairs, 549 based on Foata normal form. 4/3108 useless extension candidates. Maximal degree in co-relation 19310. Up to 2742 conditions per place. [2024-06-27 20:18:07,289 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-27 20:18:07,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1387 flow [2024-06-27 20:18:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:18:07,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-27 20:18:07,291 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 953 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:18:07,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1387 flow [2024-06-27 20:18:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1345 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:07,362 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1016 flow [2024-06-27 20:18:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-27 20:18:07,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-27 20:18:07,363 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1016 flow [2024-06-27 20:18:07,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:07,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:07,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:18:07,363 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)] === [2024-06-27 20:18:07,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -355534074, now seen corresponding path program 2 times [2024-06-27 20:18:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647686008] [2024-06-27 20:18:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:08,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647686008] [2024-06-27 20:18:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647686008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:08,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513602329] [2024-06-27 20:18:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:08,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:08,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:08,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:18:08,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1016 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:08,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:08,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:18:08,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:08,596 INFO L124 PetriNetUnfolderBase]: 1811/3002 cut-off events. [2024-06-27 20:18:08,596 INFO L125 PetriNetUnfolderBase]: For 133283/133285 co-relation queries the response was YES. [2024-06-27 20:18:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19496 conditions, 3002 events. 1811/3002 cut-off events. For 133283/133285 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16671 event pairs, 540 based on Foata normal form. 3/3005 useless extension candidates. Maximal degree in co-relation 19442. Up to 2597 conditions per place. [2024-06-27 20:18:08,618 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 117 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-27 20:18:08,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1342 flow [2024-06-27 20:18:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 20:18:08,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-27 20:18:08,619 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1016 flow. Second operand 6 states and 125 transitions. [2024-06-27 20:18:08,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1342 flow [2024-06-27 20:18:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 149 transitions, 1277 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:08,692 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1033 flow [2024-06-27 20:18:08,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-27 20:18:08,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-27 20:18:08,693 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1033 flow [2024-06-27 20:18:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:08,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:08,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:08,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:18:08,694 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:08,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash -355524154, now seen corresponding path program 1 times [2024-06-27 20:18:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792666136] [2024-06-27 20:18:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792666136] [2024-06-27 20:18:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792666136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:09,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001051590] [2024-06-27 20:18:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:09,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:09,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:09,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1033 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:09,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:09,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:09,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:09,971 INFO L124 PetriNetUnfolderBase]: 1942/3131 cut-off events. [2024-06-27 20:18:09,972 INFO L125 PetriNetUnfolderBase]: For 139394/139394 co-relation queries the response was YES. [2024-06-27 20:18:09,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20422 conditions, 3131 events. 1942/3131 cut-off events. For 139394/139394 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16850 event pairs, 584 based on Foata normal form. 1/3132 useless extension candidates. Maximal degree in co-relation 20367. Up to 2840 conditions per place. [2024-06-27 20:18:09,995 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 125 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-06-27 20:18:09,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 153 transitions, 1375 flow [2024-06-27 20:18:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:18:09,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 20:18:09,997 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1033 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:18:09,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 153 transitions, 1375 flow [2024-06-27 20:18:10,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1315 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:10,065 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1053 flow [2024-06-27 20:18:10,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-27 20:18:10,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-27 20:18:10,066 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1053 flow [2024-06-27 20:18:10,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:10,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:10,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:10,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:18:10,066 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)] === [2024-06-27 20:18:10,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:10,067 INFO L85 PathProgramCache]: Analyzing trace with hash -536784117, now seen corresponding path program 1 times [2024-06-27 20:18:10,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:10,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423244217] [2024-06-27 20:18:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423244217] [2024-06-27 20:18:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423244217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:10,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276121559] [2024-06-27 20:18:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:10,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:10,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1053 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) [2024-06-27 20:18:10,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:10,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:10,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:11,539 INFO L124 PetriNetUnfolderBase]: 2168/3389 cut-off events. [2024-06-27 20:18:11,539 INFO L125 PetriNetUnfolderBase]: For 172869/172871 co-relation queries the response was YES. [2024-06-27 20:18:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23302 conditions, 3389 events. 2168/3389 cut-off events. For 172869/172871 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17638 event pairs, 458 based on Foata normal form. 6/3395 useless extension candidates. Maximal degree in co-relation 23246. Up to 2835 conditions per place. [2024-06-27 20:18:11,565 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 131 selfloop transitions, 40 changer transitions 0/178 dead transitions. [2024-06-27 20:18:11,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 178 transitions, 1653 flow [2024-06-27 20:18:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 20:18:11,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:18:11,566 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1053 flow. Second operand 8 states and 168 transitions. [2024-06-27 20:18:11,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 178 transitions, 1653 flow [2024-06-27 20:18:11,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 178 transitions, 1595 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:11,656 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1142 flow [2024-06-27 20:18:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-27 20:18:11,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-27 20:18:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1142 flow [2024-06-27 20:18:11,657 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) [2024-06-27 20:18:11,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:11,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:11,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:18:11,658 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)] === [2024-06-27 20:18:11,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash -534906447, now seen corresponding path program 2 times [2024-06-27 20:18:11,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922759246] [2024-06-27 20:18:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:12,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:12,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922759246] [2024-06-27 20:18:12,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922759246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:12,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:12,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389708308] [2024-06-27 20:18:12,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:12,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:12,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:12,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1142 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) [2024-06-27 20:18:12,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:12,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:13,125 INFO L124 PetriNetUnfolderBase]: 2185/3416 cut-off events. [2024-06-27 20:18:13,125 INFO L125 PetriNetUnfolderBase]: For 182665/182667 co-relation queries the response was YES. [2024-06-27 20:18:13,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23942 conditions, 3416 events. 2185/3416 cut-off events. For 182665/182667 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17839 event pairs, 630 based on Foata normal form. 6/3422 useless extension candidates. Maximal degree in co-relation 23885. Up to 3015 conditions per place. [2024-06-27 20:18:13,150 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-27 20:18:13,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1580 flow [2024-06-27 20:18:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:18:13,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 20:18:13,155 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1142 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:18:13,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1580 flow [2024-06-27 20:18:13,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1502 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:13,246 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1183 flow [2024-06-27 20:18:13,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-27 20:18:13,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-27 20:18:13,246 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1183 flow [2024-06-27 20:18:13,246 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) [2024-06-27 20:18:13,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:13,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:13,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:18:13,247 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)] === [2024-06-27 20:18:13,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash -137181591, now seen corresponding path program 3 times [2024-06-27 20:18:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:13,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859162544] [2024-06-27 20:18:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:14,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859162544] [2024-06-27 20:18:14,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859162544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:14,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:14,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:14,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675095126] [2024-06-27 20:18:14,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:14,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:14,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1183 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) [2024-06-27 20:18:14,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:14,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:14,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:14,816 INFO L124 PetriNetUnfolderBase]: 2202/3443 cut-off events. [2024-06-27 20:18:14,816 INFO L125 PetriNetUnfolderBase]: For 192564/192566 co-relation queries the response was YES. [2024-06-27 20:18:14,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24399 conditions, 3443 events. 2202/3443 cut-off events. For 192564/192566 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17967 event pairs, 630 based on Foata normal form. 6/3449 useless extension candidates. Maximal degree in co-relation 24340. Up to 3001 conditions per place. [2024-06-27 20:18:14,846 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-27 20:18:14,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 1625 flow [2024-06-27 20:18:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:18:14,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 20:18:14,848 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1183 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:18:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 1625 flow [2024-06-27 20:18:14,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 179 transitions, 1536 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:14,936 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1215 flow [2024-06-27 20:18:14,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2024-06-27 20:18:14,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-27 20:18:14,937 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1215 flow [2024-06-27 20:18:14,937 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) [2024-06-27 20:18:14,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:14,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:14,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:18:14,938 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:14,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash 593000960, now seen corresponding path program 1 times [2024-06-27 20:18:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:14,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827598238] [2024-06-27 20:18:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:15,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827598238] [2024-06-27 20:18:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827598238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:15,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:15,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:15,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348285034] [2024-06-27 20:18:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:15,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:15,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1215 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:15,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:15,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:15,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:16,192 INFO L124 PetriNetUnfolderBase]: 2097/3343 cut-off events. [2024-06-27 20:18:16,192 INFO L125 PetriNetUnfolderBase]: For 201500/201502 co-relation queries the response was YES. [2024-06-27 20:18:16,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24206 conditions, 3343 events. 2097/3343 cut-off events. For 201500/201502 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17996 event pairs, 625 based on Foata normal form. 4/3347 useless extension candidates. Maximal degree in co-relation 24146. Up to 2921 conditions per place. [2024-06-27 20:18:16,216 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 134 selfloop transitions, 24 changer transitions 0/177 dead transitions. [2024-06-27 20:18:16,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 1639 flow [2024-06-27 20:18:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 20:18:16,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-27 20:18:16,217 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1215 flow. Second operand 7 states and 151 transitions. [2024-06-27 20:18:16,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 1639 flow [2024-06-27 20:18:16,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 177 transitions, 1540 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:16,335 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1231 flow [2024-06-27 20:18:16,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-27 20:18:16,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-27 20:18:16,336 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1231 flow [2024-06-27 20:18:16,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:16,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:16,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:18:16,337 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)] === [2024-06-27 20:18:16,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1169159383, now seen corresponding path program 4 times [2024-06-27 20:18:16,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:16,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399358218] [2024-06-27 20:18:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:16,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:16,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:16,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399358218] [2024-06-27 20:18:16,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399358218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:16,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:16,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017599504] [2024-06-27 20:18:16,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:16,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:17,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:17,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1231 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) [2024-06-27 20:18:17,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:17,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:17,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:17,731 INFO L124 PetriNetUnfolderBase]: 2229/3486 cut-off events. [2024-06-27 20:18:17,731 INFO L125 PetriNetUnfolderBase]: For 212978/212980 co-relation queries the response was YES. [2024-06-27 20:18:17,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25478 conditions, 3486 events. 2229/3486 cut-off events. For 212978/212980 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18270 event pairs, 462 based on Foata normal form. 6/3492 useless extension candidates. Maximal degree in co-relation 25417. Up to 2996 conditions per place. [2024-06-27 20:18:17,758 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-27 20:18:17,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 190 transitions, 1851 flow [2024-06-27 20:18:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 20:18:17,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-27 20:18:17,759 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1231 flow. Second operand 8 states and 173 transitions. [2024-06-27 20:18:17,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 190 transitions, 1851 flow [2024-06-27 20:18:17,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 1764 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:17,915 INFO L231 Difference]: Finished difference. Result has 137 places, 157 transitions, 1273 flow [2024-06-27 20:18:17,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=137, PETRI_TRANSITIONS=157} [2024-06-27 20:18:17,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-27 20:18:17,916 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 157 transitions, 1273 flow [2024-06-27 20:18:17,916 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) [2024-06-27 20:18:17,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:17,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:18:17,917 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)] === [2024-06-27 20:18:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash -858118897, now seen corresponding path program 5 times [2024-06-27 20:18:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564397492] [2024-06-27 20:18:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564397492] [2024-06-27 20:18:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564397492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:18,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758364223] [2024-06-27 20:18:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:18,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:18,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:18,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 157 transitions, 1273 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) [2024-06-27 20:18:18,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:18,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:18,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:19,473 INFO L124 PetriNetUnfolderBase]: 2246/3513 cut-off events. [2024-06-27 20:18:19,473 INFO L125 PetriNetUnfolderBase]: For 224077/224079 co-relation queries the response was YES. [2024-06-27 20:18:19,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25977 conditions, 3513 events. 2246/3513 cut-off events. For 224077/224079 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18457 event pairs, 634 based on Foata normal form. 6/3519 useless extension candidates. Maximal degree in co-relation 25915. Up to 3110 conditions per place. [2024-06-27 20:18:19,501 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 141 selfloop transitions, 41 changer transitions 0/189 dead transitions. [2024-06-27 20:18:19,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 1749 flow [2024-06-27 20:18:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 20:18:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-27 20:18:19,503 INFO L175 Difference]: Start difference. First operand has 137 places, 157 transitions, 1273 flow. Second operand 8 states and 169 transitions. [2024-06-27 20:18:19,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 1749 flow [2024-06-27 20:18:19,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 189 transitions, 1626 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:19,664 INFO L231 Difference]: Finished difference. Result has 139 places, 159 transitions, 1279 flow [2024-06-27 20:18:19,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1279, PETRI_PLACES=139, PETRI_TRANSITIONS=159} [2024-06-27 20:18:19,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 20:18:19,665 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 159 transitions, 1279 flow [2024-06-27 20:18:19,665 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) [2024-06-27 20:18:19,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:19,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:18:19,665 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:19,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash -852612367, now seen corresponding path program 6 times [2024-06-27 20:18:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:19,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606911176] [2024-06-27 20:18:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:19,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:20,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:20,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606911176] [2024-06-27 20:18:20,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606911176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:20,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:20,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867350214] [2024-06-27 20:18:20,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:20,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:20,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:20,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:20,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 1279 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) [2024-06-27 20:18:20,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:20,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:20,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:21,311 INFO L124 PetriNetUnfolderBase]: 2263/3540 cut-off events. [2024-06-27 20:18:21,312 INFO L125 PetriNetUnfolderBase]: For 234856/234858 co-relation queries the response was YES. [2024-06-27 20:18:21,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26308 conditions, 3540 events. 2263/3540 cut-off events. For 234856/234858 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18580 event pairs, 634 based on Foata normal form. 6/3546 useless extension candidates. Maximal degree in co-relation 26245. Up to 3137 conditions per place. [2024-06-27 20:18:21,341 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 38 changer transitions 0/188 dead transitions. [2024-06-27 20:18:21,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 188 transitions, 1745 flow [2024-06-27 20:18:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 20:18:21,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:18:21,343 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 1279 flow. Second operand 8 states and 165 transitions. [2024-06-27 20:18:21,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 188 transitions, 1745 flow [2024-06-27 20:18:21,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 188 transitions, 1642 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:21,567 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1299 flow [2024-06-27 20:18:21,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-27 20:18:21,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-27 20:18:21,568 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1299 flow [2024-06-27 20:18:21,568 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) [2024-06-27 20:18:21,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:21,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:18:21,568 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)] === [2024-06-27 20:18:21,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1849352266, now seen corresponding path program 2 times [2024-06-27 20:18:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:21,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666780322] [2024-06-27 20:18:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:22,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666780322] [2024-06-27 20:18:22,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666780322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:22,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:22,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:22,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580901357] [2024-06-27 20:18:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:22,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:22,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:22,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:22,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1299 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:22,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:22,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:22,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:22,850 INFO L124 PetriNetUnfolderBase]: 2161/3455 cut-off events. [2024-06-27 20:18:22,850 INFO L125 PetriNetUnfolderBase]: For 245963/245965 co-relation queries the response was YES. [2024-06-27 20:18:22,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26210 conditions, 3455 events. 2161/3455 cut-off events. For 245963/245965 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18774 event pairs, 624 based on Foata normal form. 4/3459 useless extension candidates. Maximal degree in co-relation 26146. Up to 2985 conditions per place. [2024-06-27 20:18:22,878 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-27 20:18:22,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 1865 flow [2024-06-27 20:18:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:18:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:18:22,880 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1299 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:18:22,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 1865 flow [2024-06-27 20:18:23,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1764 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:23,060 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1400 flow [2024-06-27 20:18:23,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2024-06-27 20:18:23,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-27 20:18:23,060 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1400 flow [2024-06-27 20:18:23,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:23,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:23,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:23,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:18:23,061 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)] === [2024-06-27 20:18:23,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1818727180, now seen corresponding path program 1 times [2024-06-27 20:18:23,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:23,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049178964] [2024-06-27 20:18:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:23,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:23,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:23,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049178964] [2024-06-27 20:18:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049178964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:23,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552207476] [2024-06-27 20:18:23,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:23,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:23,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:23,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:23,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:23,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:23,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:24,356 INFO L124 PetriNetUnfolderBase]: 2299/3594 cut-off events. [2024-06-27 20:18:24,357 INFO L125 PetriNetUnfolderBase]: For 258262/258262 co-relation queries the response was YES. [2024-06-27 20:18:24,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27695 conditions, 3594 events. 2299/3594 cut-off events. For 258262/258262 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18992 event pairs, 669 based on Foata normal form. 1/3595 useless extension candidates. Maximal degree in co-relation 27629. Up to 3320 conditions per place. [2024-06-27 20:18:24,388 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 154 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2024-06-27 20:18:24,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 188 transitions, 1820 flow [2024-06-27 20:18:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:18:24,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 20:18:24,390 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1400 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:18:24,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 188 transitions, 1820 flow [2024-06-27 20:18:24,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 188 transitions, 1737 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:18:24,569 INFO L231 Difference]: Finished difference. Result has 147 places, 172 transitions, 1401 flow [2024-06-27 20:18:24,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=147, PETRI_TRANSITIONS=172} [2024-06-27 20:18:24,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-27 20:18:24,570 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 172 transitions, 1401 flow [2024-06-27 20:18:24,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:24,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:24,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:24,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:18:24,571 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)] === [2024-06-27 20:18:24,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -626923359, now seen corresponding path program 7 times [2024-06-27 20:18:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:24,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160648170] [2024-06-27 20:18:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:25,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:25,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160648170] [2024-06-27 20:18:25,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160648170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:25,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:25,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:25,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940233570] [2024-06-27 20:18:25,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:25,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:25,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:25,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:25,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 172 transitions, 1401 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) [2024-06-27 20:18:25,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:25,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:25,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:26,195 INFO L124 PetriNetUnfolderBase]: 2304/3598 cut-off events. [2024-06-27 20:18:26,195 INFO L125 PetriNetUnfolderBase]: For 269669/269671 co-relation queries the response was YES. [2024-06-27 20:18:26,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28133 conditions, 3598 events. 2304/3598 cut-off events. For 269669/269671 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18932 event pairs, 658 based on Foata normal form. 6/3603 useless extension candidates. Maximal degree in co-relation 28065. Up to 3185 conditions per place. [2024-06-27 20:18:26,224 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 36 changer transitions 0/196 dead transitions. [2024-06-27 20:18:26,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 1837 flow [2024-06-27 20:18:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:18:26,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 20:18:26,229 INFO L175 Difference]: Start difference. First operand has 147 places, 172 transitions, 1401 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:18:26,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 1837 flow [2024-06-27 20:18:26,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 1755 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:26,393 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1398 flow [2024-06-27 20:18:26,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1398, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-27 20:18:26,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-27 20:18:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1398 flow [2024-06-27 20:18:26,394 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) [2024-06-27 20:18:26,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:26,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:26,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:18:26,394 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:26,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1863161836, now seen corresponding path program 3 times [2024-06-27 20:18:26,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:26,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706016651] [2024-06-27 20:18:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:27,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:27,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706016651] [2024-06-27 20:18:27,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706016651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:27,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627684339] [2024-06-27 20:18:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:27,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:27,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:27,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:27,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:27,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:27,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:27,661 INFO L124 PetriNetUnfolderBase]: 2178/3475 cut-off events. [2024-06-27 20:18:27,661 INFO L125 PetriNetUnfolderBase]: For 278242/278244 co-relation queries the response was YES. [2024-06-27 20:18:27,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27787 conditions, 3475 events. 2178/3475 cut-off events. For 278242/278244 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18804 event pairs, 650 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 27718. Up to 2973 conditions per place. [2024-06-27 20:18:27,690 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 127 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-27 20:18:27,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 192 transitions, 2076 flow [2024-06-27 20:18:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:18:27,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 20:18:27,691 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1398 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:18:27,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 192 transitions, 2076 flow [2024-06-27 20:18:27,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 192 transitions, 1982 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:27,861 INFO L231 Difference]: Finished difference. Result has 151 places, 180 transitions, 1548 flow [2024-06-27 20:18:27,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1548, PETRI_PLACES=151, PETRI_TRANSITIONS=180} [2024-06-27 20:18:27,862 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-27 20:18:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 180 transitions, 1548 flow [2024-06-27 20:18:27,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:27,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:27,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:27,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:18:27,862 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:27,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1006666324, now seen corresponding path program 2 times [2024-06-27 20:18:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:27,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461472097] [2024-06-27 20:18:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:27,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:28,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:28,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461472097] [2024-06-27 20:18:28,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461472097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:28,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721959249] [2024-06-27 20:18:28,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:28,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:28,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:28,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:28,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 180 transitions, 1548 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:28,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:28,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:28,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:29,345 INFO L124 PetriNetUnfolderBase]: 2300/3598 cut-off events. [2024-06-27 20:18:29,345 INFO L125 PetriNetUnfolderBase]: For 291509/291515 co-relation queries the response was YES. [2024-06-27 20:18:29,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29194 conditions, 3598 events. 2300/3598 cut-off events. For 291509/291515 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18998 event pairs, 673 based on Foata normal form. 7/3605 useless extension candidates. Maximal degree in co-relation 29123. Up to 3309 conditions per place. [2024-06-27 20:18:29,379 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 151 selfloop transitions, 26 changer transitions 0/197 dead transitions. [2024-06-27 20:18:29,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 197 transitions, 2128 flow [2024-06-27 20:18:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:18:29,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:18:29,380 INFO L175 Difference]: Start difference. First operand has 151 places, 180 transitions, 1548 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:18:29,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 197 transitions, 2128 flow [2024-06-27 20:18:29,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 1982 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:29,600 INFO L231 Difference]: Finished difference. Result has 154 places, 186 transitions, 1574 flow [2024-06-27 20:18:29,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1574, PETRI_PLACES=154, PETRI_TRANSITIONS=186} [2024-06-27 20:18:29,601 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 20:18:29,601 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 186 transitions, 1574 flow [2024-06-27 20:18:29,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:29,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:29,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:29,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:18:29,602 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:29,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:29,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1007141554, now seen corresponding path program 3 times [2024-06-27 20:18:29,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:29,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442188475] [2024-06-27 20:18:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:29,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:30,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:30,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442188475] [2024-06-27 20:18:30,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442188475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:30,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:30,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:30,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085814110] [2024-06-27 20:18:30,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:30,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:30,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:30,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:30,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:30,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 186 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:30,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:30,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:30,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:30,945 INFO L124 PetriNetUnfolderBase]: 2297/3594 cut-off events. [2024-06-27 20:18:30,945 INFO L125 PetriNetUnfolderBase]: For 302071/302077 co-relation queries the response was YES. [2024-06-27 20:18:30,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29181 conditions, 3594 events. 2297/3594 cut-off events. For 302071/302077 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19001 event pairs, 673 based on Foata normal form. 7/3601 useless extension candidates. Maximal degree in co-relation 29109. Up to 3306 conditions per place. [2024-06-27 20:18:30,978 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 149 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-27 20:18:30,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 1950 flow [2024-06-27 20:18:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:18:30,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-27 20:18:30,979 INFO L175 Difference]: Start difference. First operand has 154 places, 186 transitions, 1574 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:18:30,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 1950 flow [2024-06-27 20:18:31,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 196 transitions, 1840 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 20:18:31,188 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 1524 flow [2024-06-27 20:18:31,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1524, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-06-27 20:18:31,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-27 20:18:31,189 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 1524 flow [2024-06-27 20:18:31,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:31,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:31,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:31,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:18:31,189 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:31,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1501777210, now seen corresponding path program 1 times [2024-06-27 20:18:31,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:31,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160496686] [2024-06-27 20:18:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:31,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:31,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:31,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160496686] [2024-06-27 20:18:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160496686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:31,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:31,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395893255] [2024-06-27 20:18:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:31,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:31,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:31,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 1524 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:31,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:31,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:31,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:32,371 INFO L124 PetriNetUnfolderBase]: 2074/3349 cut-off events. [2024-06-27 20:18:32,371 INFO L125 PetriNetUnfolderBase]: For 270706/270706 co-relation queries the response was YES. [2024-06-27 20:18:32,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26466 conditions, 3349 events. 2074/3349 cut-off events. For 270706/270706 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18149 event pairs, 534 based on Foata normal form. 1/3350 useless extension candidates. Maximal degree in co-relation 26392. Up to 3009 conditions per place. [2024-06-27 20:18:32,402 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 180 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-27 20:18:32,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 1998 flow [2024-06-27 20:18:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:18:32,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:32,424 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 1524 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:18:32,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 1998 flow [2024-06-27 20:18:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 205 transitions, 1934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:32,711 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 1546 flow [2024-06-27 20:18:32,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1546, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-27 20:18:32,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-27 20:18:32,712 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 1546 flow [2024-06-27 20:18:32,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:32,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:32,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:18:32,713 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:32,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1855072572, now seen corresponding path program 1 times [2024-06-27 20:18:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025859270] [2024-06-27 20:18:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:33,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025859270] [2024-06-27 20:18:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025859270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:33,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875789959] [2024-06-27 20:18:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:33,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:33,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 1546 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:33,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:33,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:33,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:34,119 INFO L124 PetriNetUnfolderBase]: 2091/3368 cut-off events. [2024-06-27 20:18:34,119 INFO L125 PetriNetUnfolderBase]: For 279927/279927 co-relation queries the response was YES. [2024-06-27 20:18:34,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26967 conditions, 3368 events. 2091/3368 cut-off events. For 279927/279927 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18279 event pairs, 576 based on Foata normal form. 1/3369 useless extension candidates. Maximal degree in co-relation 26892. Up to 3009 conditions per place. [2024-06-27 20:18:34,149 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 169 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-27 20:18:34,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 205 transitions, 1992 flow [2024-06-27 20:18:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:18:34,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 20:18:34,151 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 1546 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:18:34,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 205 transitions, 1992 flow [2024-06-27 20:18:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 205 transitions, 1928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:34,472 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 1570 flow [2024-06-27 20:18:34,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1570, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-06-27 20:18:34,473 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-27 20:18:34,473 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 1570 flow [2024-06-27 20:18:34,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:34,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:34,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:18:34,473 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:34,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash 770675228, now seen corresponding path program 2 times [2024-06-27 20:18:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201777690] [2024-06-27 20:18:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:35,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:35,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201777690] [2024-06-27 20:18:35,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201777690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:35,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:35,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:35,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234074668] [2024-06-27 20:18:35,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:35,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:35,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:35,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:35,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 1570 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:35,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:35,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:35,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:35,793 INFO L124 PetriNetUnfolderBase]: 2094/3373 cut-off events. [2024-06-27 20:18:35,793 INFO L125 PetriNetUnfolderBase]: For 292604/292604 co-relation queries the response was YES. [2024-06-27 20:18:35,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27626 conditions, 3373 events. 2094/3373 cut-off events. For 292604/292604 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18207 event pairs, 533 based on Foata normal form. 1/3374 useless extension candidates. Maximal degree in co-relation 27550. Up to 3025 conditions per place. [2024-06-27 20:18:35,823 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 177 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-27 20:18:35,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 208 transitions, 2048 flow [2024-06-27 20:18:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:18:35,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 20:18:35,825 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 1570 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:18:35,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 208 transitions, 2048 flow [2024-06-27 20:18:36,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 208 transitions, 1982 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:36,214 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 1608 flow [2024-06-27 20:18:36,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1608, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-27 20:18:36,214 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-27 20:18:36,215 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 1608 flow [2024-06-27 20:18:36,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:36,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:36,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:18:36,215 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)] === [2024-06-27 20:18:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1007147506, now seen corresponding path program 2 times [2024-06-27 20:18:36,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5494257] [2024-06-27 20:18:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:36,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5494257] [2024-06-27 20:18:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5494257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:36,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:36,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58528882] [2024-06-27 20:18:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:36,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:37,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:37,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:37,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:37,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:37,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:37,494 INFO L124 PetriNetUnfolderBase]: 2101/3383 cut-off events. [2024-06-27 20:18:37,494 INFO L125 PetriNetUnfolderBase]: For 302031/302033 co-relation queries the response was YES. [2024-06-27 20:18:37,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28004 conditions, 3383 events. 2101/3383 cut-off events. For 302031/302033 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18390 event pairs, 580 based on Foata normal form. 3/3386 useless extension candidates. Maximal degree in co-relation 27927. Up to 3005 conditions per place. [2024-06-27 20:18:37,529 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2024-06-27 20:18:37,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 212 transitions, 2226 flow [2024-06-27 20:18:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:18:37,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:18:37,531 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 1608 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:18:37,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 212 transitions, 2226 flow [2024-06-27 20:18:37,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 212 transitions, 2144 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:37,822 INFO L231 Difference]: Finished difference. Result has 165 places, 201 transitions, 1704 flow [2024-06-27 20:18:37,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1704, PETRI_PLACES=165, PETRI_TRANSITIONS=201} [2024-06-27 20:18:37,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-27 20:18:37,823 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 201 transitions, 1704 flow [2024-06-27 20:18:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:37,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:37,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:37,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:18:37,823 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:37,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1006850836, now seen corresponding path program 3 times [2024-06-27 20:18:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078366650] [2024-06-27 20:18:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:37,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078366650] [2024-06-27 20:18:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078366650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:38,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:38,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:38,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156100643] [2024-06-27 20:18:38,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:38,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:38,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:38,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:38,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 201 transitions, 1704 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:38,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:38,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:39,103 INFO L124 PetriNetUnfolderBase]: 2098/3379 cut-off events. [2024-06-27 20:18:39,103 INFO L125 PetriNetUnfolderBase]: For 313218/313220 co-relation queries the response was YES. [2024-06-27 20:18:39,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28392 conditions, 3379 events. 2098/3379 cut-off events. For 313218/313220 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18332 event pairs, 580 based on Foata normal form. 3/3382 useless extension candidates. Maximal degree in co-relation 28314. Up to 3002 conditions per place. [2024-06-27 20:18:39,134 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-27 20:18:39,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2104 flow [2024-06-27 20:18:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:18:39,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:18:39,136 INFO L175 Difference]: Start difference. First operand has 165 places, 201 transitions, 1704 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:18:39,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2104 flow [2024-06-27 20:18:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 1990 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:39,523 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 1648 flow [2024-06-27 20:18:39,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1648, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-06-27 20:18:39,524 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-27 20:18:39,524 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 1648 flow [2024-06-27 20:18:39,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:39,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:39,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:39,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:18:39,525 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:39,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1006850588, now seen corresponding path program 3 times [2024-06-27 20:18:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618533243] [2024-06-27 20:18:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:39,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:40,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618533243] [2024-06-27 20:18:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618533243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:40,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841381738] [2024-06-27 20:18:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:40,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:40,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 1648 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:40,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:40,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:40,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:40,810 INFO L124 PetriNetUnfolderBase]: 2093/3374 cut-off events. [2024-06-27 20:18:40,810 INFO L125 PetriNetUnfolderBase]: For 321852/321854 co-relation queries the response was YES. [2024-06-27 20:18:40,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28527 conditions, 3374 events. 2093/3374 cut-off events. For 321852/321854 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18263 event pairs, 541 based on Foata normal form. 3/3377 useless extension candidates. Maximal degree in co-relation 28448. Up to 3014 conditions per place. [2024-06-27 20:18:40,840 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 174 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-27 20:18:40,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 214 transitions, 2132 flow [2024-06-27 20:18:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:18:40,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:18:40,842 INFO L175 Difference]: Start difference. First operand has 168 places, 201 transitions, 1648 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:18:40,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 214 transitions, 2132 flow [2024-06-27 20:18:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 214 transitions, 2060 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:41,177 INFO L231 Difference]: Finished difference. Result has 169 places, 204 transitions, 1700 flow [2024-06-27 20:18:41,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1700, PETRI_PLACES=169, PETRI_TRANSITIONS=204} [2024-06-27 20:18:41,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 20:18:41,177 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 204 transitions, 1700 flow [2024-06-27 20:18:41,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:41,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:41,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:41,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:18:41,178 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)] === [2024-06-27 20:18:41,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1591768132, now seen corresponding path program 1 times [2024-06-27 20:18:41,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:41,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950054747] [2024-06-27 20:18:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:41,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:41,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950054747] [2024-06-27 20:18:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950054747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:41,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:41,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:41,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359701973] [2024-06-27 20:18:41,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:41,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:42,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:42,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 204 transitions, 1700 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) [2024-06-27 20:18:42,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:42,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:42,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:42,851 INFO L124 PetriNetUnfolderBase]: 2488/3889 cut-off events. [2024-06-27 20:18:42,851 INFO L125 PetriNetUnfolderBase]: For 427774/427792 co-relation queries the response was YES. [2024-06-27 20:18:42,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34344 conditions, 3889 events. 2488/3889 cut-off events. For 427774/427792 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20705 event pairs, 428 based on Foata normal form. 16/3901 useless extension candidates. Maximal degree in co-relation 34264. Up to 2555 conditions per place. [2024-06-27 20:18:42,891 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 167 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-27 20:18:42,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 2552 flow [2024-06-27 20:18:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 20:18:42,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 20:18:42,896 INFO L175 Difference]: Start difference. First operand has 169 places, 204 transitions, 1700 flow. Second operand 9 states and 197 transitions. [2024-06-27 20:18:42,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 2552 flow [2024-06-27 20:18:43,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 251 transitions, 2450 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:43,342 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 1796 flow [2024-06-27 20:18:43,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1796, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-27 20:18:43,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-27 20:18:43,343 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 1796 flow [2024-06-27 20:18:43,343 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) [2024-06-27 20:18:43,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:43,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:43,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:18:43,344 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)] === [2024-06-27 20:18:43,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1005104158, now seen corresponding path program 2 times [2024-06-27 20:18:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:43,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563364018] [2024-06-27 20:18:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:43,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:44,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:44,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563364018] [2024-06-27 20:18:44,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563364018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:44,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:44,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:44,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146298399] [2024-06-27 20:18:44,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:44,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:44,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:44,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:44,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:44,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 1796 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) [2024-06-27 20:18:44,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:44,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:44,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:45,311 INFO L124 PetriNetUnfolderBase]: 2584/4058 cut-off events. [2024-06-27 20:18:45,311 INFO L125 PetriNetUnfolderBase]: For 451197/451199 co-relation queries the response was YES. [2024-06-27 20:18:45,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4058 events. 2584/4058 cut-off events. For 451197/451199 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22025 event pairs, 655 based on Foata normal form. 24/4082 useless extension candidates. Maximal degree in co-relation 35741. Up to 3260 conditions per place. [2024-06-27 20:18:45,349 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 167 selfloop transitions, 65 changer transitions 0/245 dead transitions. [2024-06-27 20:18:45,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 2418 flow [2024-06-27 20:18:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 20:18:45,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-27 20:18:45,351 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 1796 flow. Second operand 9 states and 194 transitions. [2024-06-27 20:18:45,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 2418 flow [2024-06-27 20:18:45,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2332 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:45,770 INFO L231 Difference]: Finished difference. Result has 177 places, 208 transitions, 1900 flow [2024-06-27 20:18:45,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1900, PETRI_PLACES=177, PETRI_TRANSITIONS=208} [2024-06-27 20:18:45,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-27 20:18:45,771 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 208 transitions, 1900 flow [2024-06-27 20:18:45,771 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) [2024-06-27 20:18:45,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:45,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:45,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:18:45,772 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:45,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1005281788, now seen corresponding path program 3 times [2024-06-27 20:18:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:45,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000190378] [2024-06-27 20:18:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:46,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:46,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000190378] [2024-06-27 20:18:46,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000190378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:46,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:46,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:46,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109379682] [2024-06-27 20:18:46,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:46,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:46,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:46,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:46,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 208 transitions, 1900 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) [2024-06-27 20:18:46,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:46,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:46,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:47,476 INFO L124 PetriNetUnfolderBase]: 2642/4171 cut-off events. [2024-06-27 20:18:47,476 INFO L125 PetriNetUnfolderBase]: For 462061/462063 co-relation queries the response was YES. [2024-06-27 20:18:47,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36970 conditions, 4171 events. 2642/4171 cut-off events. For 462061/462063 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22954 event pairs, 660 based on Foata normal form. 16/4187 useless extension candidates. Maximal degree in co-relation 36887. Up to 3248 conditions per place. [2024-06-27 20:18:47,518 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 170 selfloop transitions, 67 changer transitions 0/250 dead transitions. [2024-06-27 20:18:47,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 250 transitions, 2526 flow [2024-06-27 20:18:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 20:18:47,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 20:18:47,520 INFO L175 Difference]: Start difference. First operand has 177 places, 208 transitions, 1900 flow. Second operand 9 states and 197 transitions. [2024-06-27 20:18:47,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 250 transitions, 2526 flow [2024-06-27 20:18:48,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 250 transitions, 2366 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:48,109 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1910 flow [2024-06-27 20:18:48,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1910, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2024-06-27 20:18:48,109 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-27 20:18:48,109 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1910 flow [2024-06-27 20:18:48,110 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) [2024-06-27 20:18:48,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:48,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:48,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:18:48,110 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:48,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash 42339396, now seen corresponding path program 4 times [2024-06-27 20:18:48,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:48,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707491836] [2024-06-27 20:18:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:48,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:48,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707491836] [2024-06-27 20:18:48,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707491836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:48,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917664495] [2024-06-27 20:18:48,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:48,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:48,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:48,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:48,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1910 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) [2024-06-27 20:18:48,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:48,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:48,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:49,853 INFO L124 PetriNetUnfolderBase]: 2700/4274 cut-off events. [2024-06-27 20:18:49,854 INFO L125 PetriNetUnfolderBase]: For 478518/478520 co-relation queries the response was YES. [2024-06-27 20:18:49,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37543 conditions, 4274 events. 2700/4274 cut-off events. For 478518/478520 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 23780 event pairs, 670 based on Foata normal form. 16/4290 useless extension candidates. Maximal degree in co-relation 37459. Up to 3213 conditions per place. [2024-06-27 20:18:49,893 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 70 changer transitions 0/252 dead transitions. [2024-06-27 20:18:49,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 252 transitions, 2544 flow [2024-06-27 20:18:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 20:18:49,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:18:49,895 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1910 flow. Second operand 9 states and 198 transitions. [2024-06-27 20:18:49,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 252 transitions, 2544 flow [2024-06-27 20:18:50,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 2392 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:50,334 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 1936 flow [2024-06-27 20:18:50,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1936, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-27 20:18:50,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-27 20:18:50,334 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 1936 flow [2024-06-27 20:18:50,334 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) [2024-06-27 20:18:50,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:50,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:50,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:18:50,335 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)] === [2024-06-27 20:18:50,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1082841086, now seen corresponding path program 1 times [2024-06-27 20:18:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837653784] [2024-06-27 20:18:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837653784] [2024-06-27 20:18:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837653784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:51,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:51,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:51,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773888714] [2024-06-27 20:18:51,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:51,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:51,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 1936 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:18:51,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:51,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:51,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:51,992 INFO L124 PetriNetUnfolderBase]: 2649/4218 cut-off events. [2024-06-27 20:18:51,992 INFO L125 PetriNetUnfolderBase]: For 474750/474752 co-relation queries the response was YES. [2024-06-27 20:18:52,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37395 conditions, 4218 events. 2649/4218 cut-off events. For 474750/474752 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23822 event pairs, 755 based on Foata normal form. 4/4210 useless extension candidates. Maximal degree in co-relation 37310. Up to 3830 conditions per place. [2024-06-27 20:18:52,036 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 28 changer transitions 0/237 dead transitions. [2024-06-27 20:18:52,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2496 flow [2024-06-27 20:18:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:18:52,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 20:18:52,037 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 1936 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:18:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2496 flow [2024-06-27 20:18:52,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 237 transitions, 2336 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:52,719 INFO L231 Difference]: Finished difference. Result has 182 places, 214 transitions, 1921 flow [2024-06-27 20:18:52,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1921, PETRI_PLACES=182, PETRI_TRANSITIONS=214} [2024-06-27 20:18:52,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-27 20:18:52,721 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 214 transitions, 1921 flow [2024-06-27 20:18:52,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:18:52,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:52,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:52,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:18:52,722 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:52,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:52,722 INFO L85 PathProgramCache]: Analyzing trace with hash -327739580, now seen corresponding path program 5 times [2024-06-27 20:18:52,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:52,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067513226] [2024-06-27 20:18:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:53,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:53,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067513226] [2024-06-27 20:18:53,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067513226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:53,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:53,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257424435] [2024-06-27 20:18:53,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:53,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:53,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:53,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:53,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 214 transitions, 1921 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) [2024-06-27 20:18:53,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:53,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:54,724 INFO L124 PetriNetUnfolderBase]: 2843/4515 cut-off events. [2024-06-27 20:18:54,724 INFO L125 PetriNetUnfolderBase]: For 525952/525954 co-relation queries the response was YES. [2024-06-27 20:18:54,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39880 conditions, 4515 events. 2843/4515 cut-off events. For 525952/525954 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25567 event pairs, 540 based on Foata normal form. 16/4531 useless extension candidates. Maximal degree in co-relation 39794. Up to 3331 conditions per place. [2024-06-27 20:18:54,769 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 77 changer transitions 0/263 dead transitions. [2024-06-27 20:18:54,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 2819 flow [2024-06-27 20:18:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 20:18:54,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-27 20:18:54,771 INFO L175 Difference]: Start difference. First operand has 182 places, 214 transitions, 1921 flow. Second operand 9 states and 203 transitions. [2024-06-27 20:18:54,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 2819 flow [2024-06-27 20:18:55,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 263 transitions, 2702 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:55,345 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 2030 flow [2024-06-27 20:18:55,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2030, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-06-27 20:18:55,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-27 20:18:55,347 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 2030 flow [2024-06-27 20:18:55,347 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) [2024-06-27 20:18:55,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:55,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:55,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:18:55,348 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:55,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash -654744440, now seen corresponding path program 6 times [2024-06-27 20:18:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:55,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186924484] [2024-06-27 20:18:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:56,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:56,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186924484] [2024-06-27 20:18:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186924484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:56,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:56,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164613528] [2024-06-27 20:18:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:56,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:56,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:56,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:56,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 2030 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) [2024-06-27 20:18:56,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:56,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:56,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:57,413 INFO L124 PetriNetUnfolderBase]: 2918/4655 cut-off events. [2024-06-27 20:18:57,414 INFO L125 PetriNetUnfolderBase]: For 552184/552186 co-relation queries the response was YES. [2024-06-27 20:18:57,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41158 conditions, 4655 events. 2918/4655 cut-off events. For 552184/552186 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26796 event pairs, 762 based on Foata normal form. 20/4675 useless extension candidates. Maximal degree in co-relation 41071. Up to 3824 conditions per place. [2024-06-27 20:18:57,464 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 175 selfloop transitions, 66 changer transitions 0/255 dead transitions. [2024-06-27 20:18:57,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 255 transitions, 2662 flow [2024-06-27 20:18:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 20:18:57,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-27 20:18:57,465 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 2030 flow. Second operand 9 states and 193 transitions. [2024-06-27 20:18:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 255 transitions, 2662 flow [2024-06-27 20:18:58,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 255 transitions, 2551 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:58,061 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2094 flow [2024-06-27 20:18:58,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-27 20:18:58,062 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-27 20:18:58,062 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2094 flow [2024-06-27 20:18:58,062 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) [2024-06-27 20:18:58,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:58,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:58,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:18:58,063 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:58,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash -831880610, now seen corresponding path program 7 times [2024-06-27 20:18:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:58,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066239127] [2024-06-27 20:18:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:58,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066239127] [2024-06-27 20:18:58,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066239127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:58,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:58,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910117872] [2024-06-27 20:18:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:58,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:59,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:59,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2094 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) [2024-06-27 20:18:59,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:59,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:59,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:00,272 INFO L124 PetriNetUnfolderBase]: 3087/4934 cut-off events. [2024-06-27 20:19:00,272 INFO L125 PetriNetUnfolderBase]: For 595484/595486 co-relation queries the response was YES. [2024-06-27 20:19:00,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44104 conditions, 4934 events. 3087/4934 cut-off events. For 595484/595486 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28842 event pairs, 766 based on Foata normal form. 16/4950 useless extension candidates. Maximal degree in co-relation 44015. Up to 3947 conditions per place. [2024-06-27 20:19:00,324 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 180 selfloop transitions, 72 changer transitions 0/266 dead transitions. [2024-06-27 20:19:00,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3016 flow [2024-06-27 20:19:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 20:19:00,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-27 20:19:00,326 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2094 flow. Second operand 9 states and 203 transitions. [2024-06-27 20:19:00,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3016 flow [2024-06-27 20:19:00,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 266 transitions, 2867 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:00,806 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2169 flow [2024-06-27 20:19:00,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2169, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-27 20:19:00,807 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-27 20:19:00,807 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2169 flow [2024-06-27 20:19:00,807 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) [2024-06-27 20:19:00,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:00,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:19:00,807 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1884081114, now seen corresponding path program 8 times [2024-06-27 20:19:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:00,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110276735] [2024-06-27 20:19:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110276735] [2024-06-27 20:19:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110276735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:01,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:01,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547646131] [2024-06-27 20:19:01,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:01,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:01,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:01,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2169 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) [2024-06-27 20:19:01,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:01,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:01,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:02,908 INFO L124 PetriNetUnfolderBase]: 3051/4873 cut-off events. [2024-06-27 20:19:02,908 INFO L125 PetriNetUnfolderBase]: For 590108/590110 co-relation queries the response was YES. [2024-06-27 20:19:02,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42960 conditions, 4873 events. 3051/4873 cut-off events. For 590108/590110 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28421 event pairs, 768 based on Foata normal form. 20/4893 useless extension candidates. Maximal degree in co-relation 42870. Up to 4047 conditions per place. [2024-06-27 20:19:02,954 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 176 selfloop transitions, 70 changer transitions 0/260 dead transitions. [2024-06-27 20:19:02,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 260 transitions, 2785 flow [2024-06-27 20:19:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 20:19:02,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 20:19:02,956 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2169 flow. Second operand 9 states and 197 transitions. [2024-06-27 20:19:02,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 260 transitions, 2785 flow [2024-06-27 20:19:03,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 260 transitions, 2653 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:03,524 INFO L231 Difference]: Finished difference. Result has 195 places, 219 transitions, 2184 flow [2024-06-27 20:19:03,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=195, PETRI_TRANSITIONS=219} [2024-06-27 20:19:03,524 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-27 20:19:03,525 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 219 transitions, 2184 flow [2024-06-27 20:19:03,525 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) [2024-06-27 20:19:03,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:03,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:03,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:19:03,525 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:03,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash -156744200, now seen corresponding path program 9 times [2024-06-27 20:19:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:03,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628209324] [2024-06-27 20:19:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:04,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:04,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628209324] [2024-06-27 20:19:04,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628209324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:04,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:04,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707718388] [2024-06-27 20:19:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:04,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:04,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:04,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:04,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:04,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 2184 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) [2024-06-27 20:19:04,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:04,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:04,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:05,612 INFO L124 PetriNetUnfolderBase]: 3126/5008 cut-off events. [2024-06-27 20:19:05,612 INFO L125 PetriNetUnfolderBase]: For 607140/607142 co-relation queries the response was YES. [2024-06-27 20:19:05,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43866 conditions, 5008 events. 3126/5008 cut-off events. For 607140/607142 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 29527 event pairs, 797 based on Foata normal form. 20/5028 useless extension candidates. Maximal degree in co-relation 43774. Up to 4172 conditions per place. [2024-06-27 20:19:05,659 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 180 selfloop transitions, 65 changer transitions 0/259 dead transitions. [2024-06-27 20:19:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 259 transitions, 2832 flow [2024-06-27 20:19:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 20:19:05,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 20:19:05,660 INFO L175 Difference]: Start difference. First operand has 195 places, 219 transitions, 2184 flow. Second operand 9 states and 195 transitions. [2024-06-27 20:19:05,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 259 transitions, 2832 flow [2024-06-27 20:19:06,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 259 transitions, 2687 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:06,190 INFO L231 Difference]: Finished difference. Result has 196 places, 220 transitions, 2216 flow [2024-06-27 20:19:06,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2216, PETRI_PLACES=196, PETRI_TRANSITIONS=220} [2024-06-27 20:19:06,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-27 20:19:06,191 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 220 transitions, 2216 flow [2024-06-27 20:19:06,191 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) [2024-06-27 20:19:06,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:06,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:19:06,191 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)] === [2024-06-27 20:19:06,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash -661178180, now seen corresponding path program 10 times [2024-06-27 20:19:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:06,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496612631] [2024-06-27 20:19:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:06,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:07,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:07,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496612631] [2024-06-27 20:19:07,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496612631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:07,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:07,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:07,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944023868] [2024-06-27 20:19:07,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:07,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:07,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:07,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:07,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 2216 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) [2024-06-27 20:19:07,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:07,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:07,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:08,376 INFO L124 PetriNetUnfolderBase]: 3184/5106 cut-off events. [2024-06-27 20:19:08,377 INFO L125 PetriNetUnfolderBase]: For 622693/622695 co-relation queries the response was YES. [2024-06-27 20:19:08,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44694 conditions, 5106 events. 3184/5106 cut-off events. For 622693/622695 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30276 event pairs, 783 based on Foata normal form. 16/5122 useless extension candidates. Maximal degree in co-relation 44601. Up to 4040 conditions per place. [2024-06-27 20:19:08,433 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 181 selfloop transitions, 68 changer transitions 0/263 dead transitions. [2024-06-27 20:19:08,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 263 transitions, 2884 flow [2024-06-27 20:19:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 20:19:08,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 20:19:08,434 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 2216 flow. Second operand 9 states and 197 transitions. [2024-06-27 20:19:08,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 263 transitions, 2884 flow [2024-06-27 20:19:09,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 263 transitions, 2733 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:09,174 INFO L231 Difference]: Finished difference. Result has 198 places, 221 transitions, 2249 flow [2024-06-27 20:19:09,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2249, PETRI_PLACES=198, PETRI_TRANSITIONS=221} [2024-06-27 20:19:09,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-27 20:19:09,175 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 221 transitions, 2249 flow [2024-06-27 20:19:09,175 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) [2024-06-27 20:19:09,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:09,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:09,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:19:09,175 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:09,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1495083241, now seen corresponding path program 1 times [2024-06-27 20:19:09,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618526433] [2024-06-27 20:19:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:09,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:09,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618526433] [2024-06-27 20:19:09,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618526433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:09,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:09,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:09,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611959611] [2024-06-27 20:19:09,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:09,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:09,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:09,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 221 transitions, 2249 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:09,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:09,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:10,872 INFO L124 PetriNetUnfolderBase]: 3024/4924 cut-off events. [2024-06-27 20:19:10,872 INFO L125 PetriNetUnfolderBase]: For 618050/618052 co-relation queries the response was YES. [2024-06-27 20:19:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44015 conditions, 4924 events. 3024/4924 cut-off events. For 618050/618052 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29867 event pairs, 861 based on Foata normal form. 4/4892 useless extension candidates. Maximal degree in co-relation 43921. Up to 4403 conditions per place. [2024-06-27 20:19:10,927 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 189 selfloop transitions, 23 changer transitions 0/244 dead transitions. [2024-06-27 20:19:10,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 244 transitions, 2774 flow [2024-06-27 20:19:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 20:19:10,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-27 20:19:10,928 INFO L175 Difference]: Start difference. First operand has 198 places, 221 transitions, 2249 flow. Second operand 7 states and 148 transitions. [2024-06-27 20:19:10,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 244 transitions, 2774 flow [2024-06-27 20:19:11,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 244 transitions, 2610 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:11,571 INFO L231 Difference]: Finished difference. Result has 198 places, 225 transitions, 2199 flow [2024-06-27 20:19:11,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=198, PETRI_TRANSITIONS=225} [2024-06-27 20:19:11,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-27 20:19:11,571 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 225 transitions, 2199 flow [2024-06-27 20:19:11,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:11,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:11,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:11,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:19:11,571 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:11,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -896414541, now seen corresponding path program 2 times [2024-06-27 20:19:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:11,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779828242] [2024-06-27 20:19:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:12,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779828242] [2024-06-27 20:19:12,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779828242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:12,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:12,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:12,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47166433] [2024-06-27 20:19:12,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:12,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:12,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:12,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:12,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 225 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:12,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:12,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:12,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:13,199 INFO L124 PetriNetUnfolderBase]: 3026/4927 cut-off events. [2024-06-27 20:19:13,200 INFO L125 PetriNetUnfolderBase]: For 629271/629273 co-relation queries the response was YES. [2024-06-27 20:19:13,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43750 conditions, 4927 events. 3026/4927 cut-off events. For 629271/629273 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29911 event pairs, 861 based on Foata normal form. 4/4895 useless extension candidates. Maximal degree in co-relation 43655. Up to 4374 conditions per place. [2024-06-27 20:19:13,251 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 178 selfloop transitions, 35 changer transitions 0/245 dead transitions. [2024-06-27 20:19:13,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 245 transitions, 2851 flow [2024-06-27 20:19:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:19:13,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:19:13,253 INFO L175 Difference]: Start difference. First operand has 198 places, 225 transitions, 2199 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:19:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 245 transitions, 2851 flow [2024-06-27 20:19:13,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 245 transitions, 2778 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:13,916 INFO L231 Difference]: Finished difference. Result has 200 places, 228 transitions, 2259 flow [2024-06-27 20:19:13,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2259, PETRI_PLACES=200, PETRI_TRANSITIONS=228} [2024-06-27 20:19:13,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-27 20:19:13,916 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 228 transitions, 2259 flow [2024-06-27 20:19:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:13,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:13,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:19:13,917 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:13,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1214274799, now seen corresponding path program 1 times [2024-06-27 20:19:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203499121] [2024-06-27 20:19:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:13,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:14,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203499121] [2024-06-27 20:19:14,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203499121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:14,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:14,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:14,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311389005] [2024-06-27 20:19:14,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:14,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:14,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:14,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:14,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:14,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:14,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 228 transitions, 2259 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:19:14,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:14,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:14,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:15,551 INFO L124 PetriNetUnfolderBase]: 3110/5012 cut-off events. [2024-06-27 20:19:15,551 INFO L125 PetriNetUnfolderBase]: For 642699/642699 co-relation queries the response was YES. [2024-06-27 20:19:15,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44379 conditions, 5012 events. 3110/5012 cut-off events. For 642699/642699 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30029 event pairs, 892 based on Foata normal form. 1/4977 useless extension candidates. Maximal degree in co-relation 44283. Up to 4668 conditions per place. [2024-06-27 20:19:15,606 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 208 selfloop transitions, 17 changer transitions 0/248 dead transitions. [2024-06-27 20:19:15,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 248 transitions, 2809 flow [2024-06-27 20:19:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:19:15,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:19:15,607 INFO L175 Difference]: Start difference. First operand has 200 places, 228 transitions, 2259 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:19:15,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 248 transitions, 2809 flow [2024-06-27 20:19:16,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 248 transitions, 2726 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:19:16,436 INFO L231 Difference]: Finished difference. Result has 204 places, 231 transitions, 2280 flow [2024-06-27 20:19:16,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2280, PETRI_PLACES=204, PETRI_TRANSITIONS=231} [2024-06-27 20:19:16,437 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-27 20:19:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 231 transitions, 2280 flow [2024-06-27 20:19:16,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:19:16,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:16,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:16,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:19:16,437 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1214274334, now seen corresponding path program 2 times [2024-06-27 20:19:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:16,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482173121] [2024-06-27 20:19:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:16,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:17,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:17,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482173121] [2024-06-27 20:19:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482173121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:17,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:17,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:17,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710608986] [2024-06-27 20:19:17,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:17,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:17,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:17,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 231 transitions, 2280 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:19:17,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:17,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:17,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:18,244 INFO L124 PetriNetUnfolderBase]: 3156/5076 cut-off events. [2024-06-27 20:19:18,245 INFO L125 PetriNetUnfolderBase]: For 666101/666103 co-relation queries the response was YES. [2024-06-27 20:19:18,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45609 conditions, 5076 events. 3156/5076 cut-off events. For 666101/666103 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30319 event pairs, 888 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 45512. Up to 4577 conditions per place. [2024-06-27 20:19:18,302 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 192 selfloop transitions, 44 changer transitions 0/259 dead transitions. [2024-06-27 20:19:18,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 259 transitions, 3264 flow [2024-06-27 20:19:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:19:18,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:19:18,303 INFO L175 Difference]: Start difference. First operand has 204 places, 231 transitions, 2280 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:19:18,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 259 transitions, 3264 flow [2024-06-27 20:19:19,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3182 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:19,236 INFO L231 Difference]: Finished difference. Result has 207 places, 239 transitions, 2480 flow [2024-06-27 20:19:19,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2480, PETRI_PLACES=207, PETRI_TRANSITIONS=239} [2024-06-27 20:19:19,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-27 20:19:19,236 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 239 transitions, 2480 flow [2024-06-27 20:19:19,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:19:19,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:19,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:19,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:19:19,237 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:19,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1214261314, now seen corresponding path program 3 times [2024-06-27 20:19:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:19,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763420609] [2024-06-27 20:19:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:19,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763420609] [2024-06-27 20:19:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763420609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306243022] [2024-06-27 20:19:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:20,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:20,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:20,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 239 transitions, 2480 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:19:20,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:20,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:20,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:20,904 INFO L124 PetriNetUnfolderBase]: 3160/5082 cut-off events. [2024-06-27 20:19:20,905 INFO L125 PetriNetUnfolderBase]: For 687594/687596 co-relation queries the response was YES. [2024-06-27 20:19:20,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46666 conditions, 5082 events. 3160/5082 cut-off events. For 687594/687596 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30334 event pairs, 888 based on Foata normal form. 4/5050 useless extension candidates. Maximal degree in co-relation 46567. Up to 4584 conditions per place. [2024-06-27 20:19:20,962 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 190 selfloop transitions, 48 changer transitions 0/261 dead transitions. [2024-06-27 20:19:20,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 261 transitions, 3233 flow [2024-06-27 20:19:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:19:20,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:19:20,963 INFO L175 Difference]: Start difference. First operand has 207 places, 239 transitions, 2480 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:19:20,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 261 transitions, 3233 flow [2024-06-27 20:19:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 261 transitions, 3077 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 20:19:21,797 INFO L231 Difference]: Finished difference. Result has 211 places, 243 transitions, 2524 flow [2024-06-27 20:19:21,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2524, PETRI_PLACES=211, PETRI_TRANSITIONS=243} [2024-06-27 20:19:21,798 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-27 20:19:21,798 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 243 transitions, 2524 flow [2024-06-27 20:19:21,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:19:21,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:21,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:21,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:19:21,799 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)] === [2024-06-27 20:19:21,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1440718770, now seen corresponding path program 11 times [2024-06-27 20:19:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:21,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601450920] [2024-06-27 20:19:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:22,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601450920] [2024-06-27 20:19:22,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601450920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:22,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:22,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427511597] [2024-06-27 20:19:22,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:22,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:22,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:22,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:22,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:22,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 243 transitions, 2524 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) [2024-06-27 20:19:22,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:22,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:22,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:23,943 INFO L124 PetriNetUnfolderBase]: 3315/5329 cut-off events. [2024-06-27 20:19:23,944 INFO L125 PetriNetUnfolderBase]: For 742910/742912 co-relation queries the response was YES. [2024-06-27 20:19:23,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48310 conditions, 5329 events. 3315/5329 cut-off events. For 742910/742912 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31891 event pairs, 844 based on Foata normal form. 22/5350 useless extension candidates. Maximal degree in co-relation 48209. Up to 4458 conditions per place. [2024-06-27 20:19:23,999 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 200 selfloop transitions, 63 changer transitions 0/280 dead transitions. [2024-06-27 20:19:23,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 280 transitions, 3206 flow [2024-06-27 20:19:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 20:19:24,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:19:24,001 INFO L175 Difference]: Start difference. First operand has 211 places, 243 transitions, 2524 flow. Second operand 9 states and 189 transitions. [2024-06-27 20:19:24,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 280 transitions, 3206 flow [2024-06-27 20:19:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 280 transitions, 3082 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:24,947 INFO L231 Difference]: Finished difference. Result has 215 places, 244 transitions, 2577 flow [2024-06-27 20:19:24,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2577, PETRI_PLACES=215, PETRI_TRANSITIONS=244} [2024-06-27 20:19:24,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 20:19:24,948 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 244 transitions, 2577 flow [2024-06-27 20:19:24,948 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) [2024-06-27 20:19:24,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:24,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:24,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:19:24,949 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)] === [2024-06-27 20:19:24,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1440714120, now seen corresponding path program 12 times [2024-06-27 20:19:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:24,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286175979] [2024-06-27 20:19:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286175979] [2024-06-27 20:19:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286175979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:25,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291297973] [2024-06-27 20:19:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:25,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:25,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:25,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 244 transitions, 2577 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) [2024-06-27 20:19:25,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:25,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:25,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:27,040 INFO L124 PetriNetUnfolderBase]: 3373/5427 cut-off events. [2024-06-27 20:19:27,041 INFO L125 PetriNetUnfolderBase]: For 760276/760278 co-relation queries the response was YES. [2024-06-27 20:19:27,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49324 conditions, 5427 events. 3373/5427 cut-off events. For 760276/760278 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32630 event pairs, 830 based on Foata normal form. 18/5444 useless extension candidates. Maximal degree in co-relation 49222. Up to 4265 conditions per place. [2024-06-27 20:19:27,106 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 66 changer transitions 0/286 dead transitions. [2024-06-27 20:19:27,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 286 transitions, 3521 flow [2024-06-27 20:19:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 20:19:27,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-27 20:19:27,108 INFO L175 Difference]: Start difference. First operand has 215 places, 244 transitions, 2577 flow. Second operand 9 states and 193 transitions. [2024-06-27 20:19:27,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 286 transitions, 3521 flow [2024-06-27 20:19:28,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 286 transitions, 3370 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:28,206 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 2608 flow [2024-06-27 20:19:28,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2024-06-27 20:19:28,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-27 20:19:28,207 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 2608 flow [2024-06-27 20:19:28,207 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) [2024-06-27 20:19:28,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:28,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:28,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:19:28,208 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)] === [2024-06-27 20:19:28,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1401834906, now seen corresponding path program 13 times [2024-06-27 20:19:28,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:28,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582547031] [2024-06-27 20:19:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:28,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582547031] [2024-06-27 20:19:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582547031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526835991] [2024-06-27 20:19:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:29,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:29,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 2608 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) [2024-06-27 20:19:29,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:29,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:29,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:30,387 INFO L124 PetriNetUnfolderBase]: 3448/5547 cut-off events. [2024-06-27 20:19:30,387 INFO L125 PetriNetUnfolderBase]: For 790127/790129 co-relation queries the response was YES. [2024-06-27 20:19:30,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5547 events. 3448/5547 cut-off events. For 790127/790129 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33573 event pairs, 865 based on Foata normal form. 22/5568 useless extension candidates. Maximal degree in co-relation 50123. Up to 4681 conditions per place. [2024-06-27 20:19:30,450 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 198 selfloop transitions, 66 changer transitions 0/281 dead transitions. [2024-06-27 20:19:30,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 281 transitions, 3292 flow [2024-06-27 20:19:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 20:19:30,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 20:19:30,452 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 2608 flow. Second operand 9 states and 187 transitions. [2024-06-27 20:19:30,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 281 transitions, 3292 flow [2024-06-27 20:19:31,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 281 transitions, 3049 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:31,365 INFO L231 Difference]: Finished difference. Result has 218 places, 246 transitions, 2552 flow [2024-06-27 20:19:31,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2552, PETRI_PLACES=218, PETRI_TRANSITIONS=246} [2024-06-27 20:19:31,366 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-27 20:19:31,366 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 246 transitions, 2552 flow [2024-06-27 20:19:31,366 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) [2024-06-27 20:19:31,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:31,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:31,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:19:31,367 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)] === [2024-06-27 20:19:31,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash -763416124, now seen corresponding path program 14 times [2024-06-27 20:19:31,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:31,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786079751] [2024-06-27 20:19:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:32,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786079751] [2024-06-27 20:19:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786079751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:32,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:32,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:32,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140835946] [2024-06-27 20:19:32,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:32,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:32,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 246 transitions, 2552 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) [2024-06-27 20:19:32,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:32,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:32,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:33,605 INFO L124 PetriNetUnfolderBase]: 3412/5491 cut-off events. [2024-06-27 20:19:33,606 INFO L125 PetriNetUnfolderBase]: For 767168/767170 co-relation queries the response was YES. [2024-06-27 20:19:33,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48246 conditions, 5491 events. 3412/5491 cut-off events. For 767168/767170 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33205 event pairs, 842 based on Foata normal form. 22/5512 useless extension candidates. Maximal degree in co-relation 48143. Up to 4625 conditions per place. [2024-06-27 20:19:33,669 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 62 changer transitions 0/282 dead transitions. [2024-06-27 20:19:33,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 282 transitions, 3196 flow [2024-06-27 20:19:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 20:19:33,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 20:19:33,671 INFO L175 Difference]: Start difference. First operand has 218 places, 246 transitions, 2552 flow. Second operand 9 states and 190 transitions. [2024-06-27 20:19:33,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 282 transitions, 3196 flow [2024-06-27 20:19:34,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 282 transitions, 3019 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:34,632 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 2506 flow [2024-06-27 20:19:34,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2506, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-06-27 20:19:34,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-27 20:19:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 2506 flow [2024-06-27 20:19:34,633 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) [2024-06-27 20:19:34,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:34,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:34,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:19:34,634 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)] === [2024-06-27 20:19:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1869751151, now seen corresponding path program 3 times [2024-06-27 20:19:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475085079] [2024-06-27 20:19:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:35,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:35,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475085079] [2024-06-27 20:19:35,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475085079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:35,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:35,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875004857] [2024-06-27 20:19:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:35,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:35,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:35,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:35,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:35,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:35,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:35,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:36,385 INFO L124 PetriNetUnfolderBase]: 3237/5270 cut-off events. [2024-06-27 20:19:36,386 INFO L125 PetriNetUnfolderBase]: For 741329/741329 co-relation queries the response was YES. [2024-06-27 20:19:36,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46992 conditions, 5270 events. 3237/5270 cut-off events. For 741329/741329 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32413 event pairs, 909 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 46888. Up to 4725 conditions per place. [2024-06-27 20:19:36,445 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 204 selfloop transitions, 23 changer transitions 0/262 dead transitions. [2024-06-27 20:19:36,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 262 transitions, 3000 flow [2024-06-27 20:19:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:19:36,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 20:19:36,447 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 2506 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:19:36,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 262 transitions, 3000 flow [2024-06-27 20:19:37,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 2839 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:37,476 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 2397 flow [2024-06-27 20:19:37,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2397, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-27 20:19:37,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-27 20:19:37,484 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 2397 flow [2024-06-27 20:19:37,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:37,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:37,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:37,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:19:37,485 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)] === [2024-06-27 20:19:37,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash -683989521, now seen corresponding path program 4 times [2024-06-27 20:19:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:37,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431109700] [2024-06-27 20:19:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:37,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:38,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431109700] [2024-06-27 20:19:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431109700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:38,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:38,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:38,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539594] [2024-06-27 20:19:38,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:38,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:38,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:38,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:38,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 2397 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:38,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:38,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:39,301 INFO L124 PetriNetUnfolderBase]: 3242/5277 cut-off events. [2024-06-27 20:19:39,301 INFO L125 PetriNetUnfolderBase]: For 758668/758668 co-relation queries the response was YES. [2024-06-27 20:19:39,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46960 conditions, 5277 events. 3242/5277 cut-off events. For 758668/758668 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32436 event pairs, 907 based on Foata normal form. 1/5229 useless extension candidates. Maximal degree in co-relation 46855. Up to 4720 conditions per place. [2024-06-27 20:19:39,354 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 195 selfloop transitions, 32 changer transitions 0/262 dead transitions. [2024-06-27 20:19:39,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 262 transitions, 2931 flow [2024-06-27 20:19:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:19:39,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 20:19:39,355 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 2397 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:19:39,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 262 transitions, 2931 flow [2024-06-27 20:19:40,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 2832 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:40,326 INFO L231 Difference]: Finished difference. Result has 219 places, 249 transitions, 2422 flow [2024-06-27 20:19:40,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=219, PETRI_TRANSITIONS=249} [2024-06-27 20:19:40,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-27 20:19:40,327 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 249 transitions, 2422 flow [2024-06-27 20:19:40,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:40,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:40,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:19:40,328 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)] === [2024-06-27 20:19:40,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1604580992, now seen corresponding path program 1 times [2024-06-27 20:19:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675264415] [2024-06-27 20:19:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:40,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675264415] [2024-06-27 20:19:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675264415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:41,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416864593] [2024-06-27 20:19:41,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:41,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:41,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 249 transitions, 2422 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:41,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:41,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:41,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:42,894 INFO L124 PetriNetUnfolderBase]: 3427/5490 cut-off events. [2024-06-27 20:19:42,894 INFO L125 PetriNetUnfolderBase]: For 784754/784754 co-relation queries the response was YES. [2024-06-27 20:19:42,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 5490 events. 3427/5490 cut-off events. For 784754/784754 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33068 event pairs, 880 based on Foata normal form. 4/5493 useless extension candidates. Maximal degree in co-relation 48249. Up to 4752 conditions per place. [2024-06-27 20:19:43,073 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 198 selfloop transitions, 74 changer transitions 0/289 dead transitions. [2024-06-27 20:19:43,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 289 transitions, 3138 flow [2024-06-27 20:19:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:19:43,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 20:19:43,074 INFO L175 Difference]: Start difference. First operand has 219 places, 249 transitions, 2422 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:19:43,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 289 transitions, 3138 flow [2024-06-27 20:19:44,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 289 transitions, 3046 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:44,150 INFO L231 Difference]: Finished difference. Result has 225 places, 254 transitions, 2575 flow [2024-06-27 20:19:44,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2575, PETRI_PLACES=225, PETRI_TRANSITIONS=254} [2024-06-27 20:19:44,151 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-27 20:19:44,151 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 254 transitions, 2575 flow [2024-06-27 20:19:44,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:44,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:44,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:44,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:19:44,151 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:44,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1574254046, now seen corresponding path program 2 times [2024-06-27 20:19:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595946356] [2024-06-27 20:19:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:45,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:45,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595946356] [2024-06-27 20:19:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595946356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:45,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:45,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:45,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975785986] [2024-06-27 20:19:45,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:45,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:45,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:45,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 254 transitions, 2575 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:45,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:45,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:45,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:46,740 INFO L124 PetriNetUnfolderBase]: 3444/5513 cut-off events. [2024-06-27 20:19:46,741 INFO L125 PetriNetUnfolderBase]: For 809414/809414 co-relation queries the response was YES. [2024-06-27 20:19:46,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49622 conditions, 5513 events. 3444/5513 cut-off events. For 809414/809414 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33190 event pairs, 879 based on Foata normal form. 4/5516 useless extension candidates. Maximal degree in co-relation 49514. Up to 4779 conditions per place. [2024-06-27 20:19:46,802 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 200 selfloop transitions, 77 changer transitions 0/294 dead transitions. [2024-06-27 20:19:46,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 294 transitions, 3317 flow [2024-06-27 20:19:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:19:46,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 20:19:46,804 INFO L175 Difference]: Start difference. First operand has 225 places, 254 transitions, 2575 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:19:46,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 294 transitions, 3317 flow [2024-06-27 20:19:47,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 294 transitions, 3112 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:47,710 INFO L231 Difference]: Finished difference. Result has 229 places, 259 transitions, 2631 flow [2024-06-27 20:19:47,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2631, PETRI_PLACES=229, PETRI_TRANSITIONS=259} [2024-06-27 20:19:47,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-27 20:19:47,711 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 259 transitions, 2631 flow [2024-06-27 20:19:47,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:47,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:47,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:47,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:19:47,711 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)] === [2024-06-27 20:19:47,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1220935134, now seen corresponding path program 3 times [2024-06-27 20:19:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305822564] [2024-06-27 20:19:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:47,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:48,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:48,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305822564] [2024-06-27 20:19:48,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305822564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:48,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:48,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:48,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491487918] [2024-06-27 20:19:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:48,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:48,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:48,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:48,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 259 transitions, 2631 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:48,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:48,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:48,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:50,146 INFO L124 PetriNetUnfolderBase]: 3472/5564 cut-off events. [2024-06-27 20:19:50,146 INFO L125 PetriNetUnfolderBase]: For 832665/832665 co-relation queries the response was YES. [2024-06-27 20:19:50,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50593 conditions, 5564 events. 3472/5564 cut-off events. For 832665/832665 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33584 event pairs, 879 based on Foata normal form. 4/5567 useless extension candidates. Maximal degree in co-relation 50483. Up to 4813 conditions per place. [2024-06-27 20:19:50,211 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 197 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-27 20:19:50,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 3445 flow [2024-06-27 20:19:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:19:50,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 20:19:50,213 INFO L175 Difference]: Start difference. First operand has 229 places, 259 transitions, 2631 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:19:50,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 3445 flow [2024-06-27 20:19:51,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 303 transitions, 3216 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:51,388 INFO L231 Difference]: Finished difference. Result has 233 places, 270 transitions, 2765 flow [2024-06-27 20:19:51,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2765, PETRI_PLACES=233, PETRI_TRANSITIONS=270} [2024-06-27 20:19:51,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-27 20:19:51,389 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 270 transitions, 2765 flow [2024-06-27 20:19:51,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:51,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:51,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:51,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:19:51,390 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)] === [2024-06-27 20:19:51,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:51,390 INFO L85 PathProgramCache]: Analyzing trace with hash 935835264, now seen corresponding path program 4 times [2024-06-27 20:19:51,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:51,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252359347] [2024-06-27 20:19:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:51,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:52,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252359347] [2024-06-27 20:19:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252359347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:52,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:52,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:52,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605813746] [2024-06-27 20:19:52,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:52,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:52,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:52,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:52,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 270 transitions, 2765 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:52,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:52,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:53,894 INFO L124 PetriNetUnfolderBase]: 3464/5546 cut-off events. [2024-06-27 20:19:53,894 INFO L125 PetriNetUnfolderBase]: For 845377/845377 co-relation queries the response was YES. [2024-06-27 20:19:53,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50837 conditions, 5546 events. 3464/5546 cut-off events. For 845377/845377 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33415 event pairs, 877 based on Foata normal form. 4/5549 useless extension candidates. Maximal degree in co-relation 50725. Up to 4801 conditions per place. [2024-06-27 20:19:53,960 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 202 selfloop transitions, 87 changer transitions 0/306 dead transitions. [2024-06-27 20:19:53,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3518 flow [2024-06-27 20:19:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:19:53,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 20:19:53,961 INFO L175 Difference]: Start difference. First operand has 233 places, 270 transitions, 2765 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:19:53,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3518 flow [2024-06-27 20:19:55,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 306 transitions, 3309 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:55,024 INFO L231 Difference]: Finished difference. Result has 239 places, 273 transitions, 2842 flow [2024-06-27 20:19:55,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2842, PETRI_PLACES=239, PETRI_TRANSITIONS=273} [2024-06-27 20:19:55,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-27 20:19:55,024 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 273 transitions, 2842 flow [2024-06-27 20:19:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:55,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:55,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:55,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:19:55,025 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)] === [2024-06-27 20:19:55,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:55,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1231410654, now seen corresponding path program 5 times [2024-06-27 20:19:55,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:55,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407230171] [2024-06-27 20:19:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:55,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:56,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407230171] [2024-06-27 20:19:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407230171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:56,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:56,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:56,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49118884] [2024-06-27 20:19:56,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:56,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:56,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:56,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:56,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 273 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:56,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:56,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:56,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:57,630 INFO L124 PetriNetUnfolderBase]: 3497/5621 cut-off events. [2024-06-27 20:19:57,630 INFO L125 PetriNetUnfolderBase]: For 854858/854858 co-relation queries the response was YES. [2024-06-27 20:19:57,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50234 conditions, 5621 events. 3497/5621 cut-off events. For 854858/854858 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34192 event pairs, 782 based on Foata normal form. 4/5624 useless extension candidates. Maximal degree in co-relation 50120. Up to 4655 conditions per place. [2024-06-27 20:19:57,691 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 195 selfloop transitions, 101 changer transitions 0/313 dead transitions. [2024-06-27 20:19:57,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 313 transitions, 3620 flow [2024-06-27 20:19:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 20:19:57,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:19:57,693 INFO L175 Difference]: Start difference. First operand has 239 places, 273 transitions, 2842 flow. Second operand 10 states and 210 transitions. [2024-06-27 20:19:57,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 313 transitions, 3620 flow [2024-06-27 20:19:58,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 313 transitions, 3377 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:58,873 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 2909 flow [2024-06-27 20:19:58,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2909, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-27 20:19:58,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-27 20:19:58,874 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 2909 flow [2024-06-27 20:19:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:58,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:58,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:58,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:19:58,875 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:58,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1141876271, now seen corresponding path program 5 times [2024-06-27 20:19:58,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:58,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070701116] [2024-06-27 20:19:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:58,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:59,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070701116] [2024-06-27 20:19:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070701116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:59,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:59,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:59,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054208416] [2024-06-27 20:19:59,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:59,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:59,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:59,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:59,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:59,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 2909 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:59,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:59,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:59,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:00,661 INFO L124 PetriNetUnfolderBase]: 3331/5451 cut-off events. [2024-06-27 20:20:00,662 INFO L125 PetriNetUnfolderBase]: For 869094/869096 co-relation queries the response was YES. [2024-06-27 20:20:00,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49739 conditions, 5451 events. 3331/5451 cut-off events. For 869094/869096 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34006 event pairs, 847 based on Foata normal form. 4/5406 useless extension candidates. Maximal degree in co-relation 49623. Up to 4810 conditions per place. [2024-06-27 20:20:00,727 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 204 selfloop transitions, 51 changer transitions 0/290 dead transitions. [2024-06-27 20:20:00,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 290 transitions, 3661 flow [2024-06-27 20:20:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:20:00,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 20:20:00,729 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 2909 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:20:00,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 290 transitions, 3661 flow [2024-06-27 20:20:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 290 transitions, 3423 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:01,989 INFO L231 Difference]: Finished difference. Result has 243 places, 279 transitions, 2837 flow [2024-06-27 20:20:01,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2837, PETRI_PLACES=243, PETRI_TRANSITIONS=279} [2024-06-27 20:20:01,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-27 20:20:01,990 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 279 transitions, 2837 flow [2024-06-27 20:20:01,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:01,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:20:01,990 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:01,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1142026001, now seen corresponding path program 6 times [2024-06-27 20:20:01,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:01,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593053830] [2024-06-27 20:20:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:02,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:02,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593053830] [2024-06-27 20:20:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593053830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:02,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:02,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:02,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765206382] [2024-06-27 20:20:02,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:02,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:02,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:02,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:02,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 279 transitions, 2837 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:02,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:02,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:02,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:03,777 INFO L124 PetriNetUnfolderBase]: 3326/5435 cut-off events. [2024-06-27 20:20:03,777 INFO L125 PetriNetUnfolderBase]: For 882726/882728 co-relation queries the response was YES. [2024-06-27 20:20:03,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49326 conditions, 5435 events. 3326/5435 cut-off events. For 882726/882728 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33755 event pairs, 837 based on Foata normal form. 3/5389 useless extension candidates. Maximal degree in co-relation 49209. Up to 4805 conditions per place. [2024-06-27 20:20:03,843 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 199 selfloop transitions, 55 changer transitions 0/289 dead transitions. [2024-06-27 20:20:03,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 289 transitions, 3369 flow [2024-06-27 20:20:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:20:03,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 20:20:03,844 INFO L175 Difference]: Start difference. First operand has 243 places, 279 transitions, 2837 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:20:03,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 289 transitions, 3369 flow [2024-06-27 20:20:05,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 289 transitions, 3219 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:05,062 INFO L231 Difference]: Finished difference. Result has 246 places, 279 transitions, 2803 flow [2024-06-27 20:20:05,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2803, PETRI_PLACES=246, PETRI_TRANSITIONS=279} [2024-06-27 20:20:05,063 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-27 20:20:05,063 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 279 transitions, 2803 flow [2024-06-27 20:20:05,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:05,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:05,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:05,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:20:05,064 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:05,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash 918653896, now seen corresponding path program 4 times [2024-06-27 20:20:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:05,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505461139] [2024-06-27 20:20:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505461139] [2024-06-27 20:20:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505461139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:05,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:05,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:05,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513219300] [2024-06-27 20:20:05,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:05,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:05,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:05,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:05,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 279 transitions, 2803 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:05,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:05,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:05,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:06,974 INFO L124 PetriNetUnfolderBase]: 3442/5572 cut-off events. [2024-06-27 20:20:06,974 INFO L125 PetriNetUnfolderBase]: For 912699/912701 co-relation queries the response was YES. [2024-06-27 20:20:07,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50601 conditions, 5572 events. 3442/5572 cut-off events. For 912699/912701 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34336 event pairs, 868 based on Foata normal form. 4/5527 useless extension candidates. Maximal degree in co-relation 50483. Up to 4948 conditions per place. [2024-06-27 20:20:07,040 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 207 selfloop transitions, 77 changer transitions 0/307 dead transitions. [2024-06-27 20:20:07,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 307 transitions, 4259 flow [2024-06-27 20:20:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:20:07,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:20:07,042 INFO L175 Difference]: Start difference. First operand has 246 places, 279 transitions, 2803 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:20:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 307 transitions, 4259 flow [2024-06-27 20:20:08,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 307 transitions, 4111 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:08,010 INFO L231 Difference]: Finished difference. Result has 248 places, 290 transitions, 3083 flow [2024-06-27 20:20:08,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3083, PETRI_PLACES=248, PETRI_TRANSITIONS=290} [2024-06-27 20:20:08,011 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-27 20:20:08,011 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 290 transitions, 3083 flow [2024-06-27 20:20:08,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:08,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:08,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:08,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:20:08,012 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:08,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:08,012 INFO L85 PathProgramCache]: Analyzing trace with hash 918654361, now seen corresponding path program 2 times [2024-06-27 20:20:08,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:08,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912474276] [2024-06-27 20:20:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:08,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:08,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912474276] [2024-06-27 20:20:08,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912474276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:08,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9857402] [2024-06-27 20:20:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:08,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:08,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 290 transitions, 3083 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:08,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:08,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:08,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:09,905 INFO L124 PetriNetUnfolderBase]: 3447/5578 cut-off events. [2024-06-27 20:20:09,905 INFO L125 PetriNetUnfolderBase]: For 937827/937833 co-relation queries the response was YES. [2024-06-27 20:20:09,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51691 conditions, 5578 events. 3447/5578 cut-off events. For 937827/937833 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34308 event pairs, 843 based on Foata normal form. 7/5537 useless extension candidates. Maximal degree in co-relation 51571. Up to 5170 conditions per place. [2024-06-27 20:20:09,973 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 253 selfloop transitions, 35 changer transitions 0/311 dead transitions. [2024-06-27 20:20:09,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 311 transitions, 4035 flow [2024-06-27 20:20:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:20:09,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:20:09,975 INFO L175 Difference]: Start difference. First operand has 248 places, 290 transitions, 3083 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:20:09,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 311 transitions, 4035 flow [2024-06-27 20:20:11,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 311 transitions, 3801 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:11,188 INFO L231 Difference]: Finished difference. Result has 253 places, 299 transitions, 3131 flow [2024-06-27 20:20:11,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3131, PETRI_PLACES=253, PETRI_TRANSITIONS=299} [2024-06-27 20:20:11,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-27 20:20:11,189 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 299 transitions, 3131 flow [2024-06-27 20:20:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:11,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:11,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:11,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:20:11,192 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:11,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1157123311, now seen corresponding path program 3 times [2024-06-27 20:20:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:11,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954929454] [2024-06-27 20:20:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:12,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954929454] [2024-06-27 20:20:12,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954929454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:12,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:12,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055226275] [2024-06-27 20:20:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:12,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:12,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 299 transitions, 3131 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:12,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:12,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:12,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:13,124 INFO L124 PetriNetUnfolderBase]: 3452/5585 cut-off events. [2024-06-27 20:20:13,124 INFO L125 PetriNetUnfolderBase]: For 957607/957613 co-relation queries the response was YES. [2024-06-27 20:20:13,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51637 conditions, 5585 events. 3452/5585 cut-off events. For 957607/957613 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34335 event pairs, 843 based on Foata normal form. 7/5544 useless extension candidates. Maximal degree in co-relation 51515. Up to 5176 conditions per place. [2024-06-27 20:20:13,193 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 250 selfloop transitions, 41 changer transitions 0/314 dead transitions. [2024-06-27 20:20:13,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 314 transitions, 4001 flow [2024-06-27 20:20:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:20:13,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 20:20:13,195 INFO L175 Difference]: Start difference. First operand has 253 places, 299 transitions, 3131 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:20:13,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 314 transitions, 4001 flow [2024-06-27 20:20:14,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 3895 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:14,208 INFO L231 Difference]: Finished difference. Result has 258 places, 302 transitions, 3203 flow [2024-06-27 20:20:14,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3203, PETRI_PLACES=258, PETRI_TRANSITIONS=302} [2024-06-27 20:20:14,208 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-27 20:20:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 302 transitions, 3203 flow [2024-06-27 20:20:14,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:14,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:14,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:14,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:20:14,209 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1141872706, now seen corresponding path program 5 times [2024-06-27 20:20:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:14,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536696742] [2024-06-27 20:20:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:14,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536696742] [2024-06-27 20:20:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536696742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:14,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:14,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980909036] [2024-06-27 20:20:14,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:14,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:14,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:15,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:15,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 302 transitions, 3203 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:15,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:15,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:15,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:16,121 INFO L124 PetriNetUnfolderBase]: 3462/5600 cut-off events. [2024-06-27 20:20:16,121 INFO L125 PetriNetUnfolderBase]: For 980204/980206 co-relation queries the response was YES. [2024-06-27 20:20:16,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51978 conditions, 5600 events. 3462/5600 cut-off events. For 980204/980206 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34407 event pairs, 867 based on Foata normal form. 4/5555 useless extension candidates. Maximal degree in co-relation 51854. Up to 4975 conditions per place. [2024-06-27 20:20:16,187 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 214 selfloop transitions, 88 changer transitions 0/325 dead transitions. [2024-06-27 20:20:16,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 325 transitions, 4564 flow [2024-06-27 20:20:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:20:16,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:20:16,188 INFO L175 Difference]: Start difference. First operand has 258 places, 302 transitions, 3203 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:20:16,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 325 transitions, 4564 flow [2024-06-27 20:20:17,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 325 transitions, 4426 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:17,381 INFO L231 Difference]: Finished difference. Result has 262 places, 311 transitions, 3492 flow [2024-06-27 20:20:17,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=262, PETRI_TRANSITIONS=311} [2024-06-27 20:20:17,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-27 20:20:17,381 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 311 transitions, 3492 flow [2024-06-27 20:20:17,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:17,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:17,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:17,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:20:17,382 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:17,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1156617856, now seen corresponding path program 6 times [2024-06-27 20:20:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:17,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139968754] [2024-06-27 20:20:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:18,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139968754] [2024-06-27 20:20:18,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139968754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:18,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:18,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62926801] [2024-06-27 20:20:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:18,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:18,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:18,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:18,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 311 transitions, 3492 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:18,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:18,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:18,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:19,321 INFO L124 PetriNetUnfolderBase]: 3458/5596 cut-off events. [2024-06-27 20:20:19,321 INFO L125 PetriNetUnfolderBase]: For 997406/997408 co-relation queries the response was YES. [2024-06-27 20:20:19,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52422 conditions, 5596 events. 3458/5596 cut-off events. For 997406/997408 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34417 event pairs, 867 based on Foata normal form. 4/5551 useless extension candidates. Maximal degree in co-relation 52296. Up to 4973 conditions per place. [2024-06-27 20:20:19,393 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 212 selfloop transitions, 89 changer transitions 0/324 dead transitions. [2024-06-27 20:20:19,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 324 transitions, 4472 flow [2024-06-27 20:20:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:20:19,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:20:19,394 INFO L175 Difference]: Start difference. First operand has 262 places, 311 transitions, 3492 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:20:19,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 324 transitions, 4472 flow [2024-06-27 20:20:20,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 324 transitions, 4277 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:20,699 INFO L231 Difference]: Finished difference. Result has 267 places, 311 transitions, 3483 flow [2024-06-27 20:20:20,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3483, PETRI_PLACES=267, PETRI_TRANSITIONS=311} [2024-06-27 20:20:20,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-27 20:20:20,700 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 311 transitions, 3483 flow [2024-06-27 20:20:20,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:20,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:20,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:20,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:20:20,701 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)] === [2024-06-27 20:20:20,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1156618321, now seen corresponding path program 4 times [2024-06-27 20:20:20,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:20,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486854013] [2024-06-27 20:20:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:20,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486854013] [2024-06-27 20:20:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486854013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:21,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294695097] [2024-06-27 20:20:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:21,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:21,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:21,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 311 transitions, 3483 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:21,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:21,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:21,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:22,643 INFO L124 PetriNetUnfolderBase]: 3455/5591 cut-off events. [2024-06-27 20:20:22,644 INFO L125 PetriNetUnfolderBase]: For 1010052/1010056 co-relation queries the response was YES. [2024-06-27 20:20:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52523 conditions, 5591 events. 3455/5591 cut-off events. For 1010052/1010056 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34389 event pairs, 842 based on Foata normal form. 5/5548 useless extension candidates. Maximal degree in co-relation 52395. Up to 5182 conditions per place. [2024-06-27 20:20:22,716 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 39 changer transitions 0/322 dead transitions. [2024-06-27 20:20:22,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 322 transitions, 4107 flow [2024-06-27 20:20:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:20:22,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 20:20:22,717 INFO L175 Difference]: Start difference. First operand has 267 places, 311 transitions, 3483 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:20:22,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 322 transitions, 4107 flow [2024-06-27 20:20:23,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 322 transitions, 3805 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:23,902 INFO L231 Difference]: Finished difference. Result has 267 places, 311 transitions, 3265 flow [2024-06-27 20:20:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=267, PETRI_TRANSITIONS=311} [2024-06-27 20:20:23,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-27 20:20:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 311 transitions, 3265 flow [2024-06-27 20:20:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:23,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:23,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:23,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:20:23,908 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)] === [2024-06-27 20:20:23,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1884584657, now seen corresponding path program 1 times [2024-06-27 20:20:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:23,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783248891] [2024-06-27 20:20:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783248891] [2024-06-27 20:20:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783248891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:24,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:24,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601161949] [2024-06-27 20:20:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:24,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:24,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:24,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 311 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:24,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:24,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:24,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:25,945 INFO L124 PetriNetUnfolderBase]: 3427/5607 cut-off events. [2024-06-27 20:20:25,946 INFO L125 PetriNetUnfolderBase]: For 1040252/1040252 co-relation queries the response was YES. [2024-06-27 20:20:25,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52312 conditions, 5607 events. 3427/5607 cut-off events. For 1040252/1040252 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34786 event pairs, 805 based on Foata normal form. 2/5609 useless extension candidates. Maximal degree in co-relation 52184. Up to 5084 conditions per place. [2024-06-27 20:20:26,023 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 290 selfloop transitions, 17 changer transitions 0/335 dead transitions. [2024-06-27 20:20:26,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 335 transitions, 3991 flow [2024-06-27 20:20:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:20:26,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:20:26,025 INFO L175 Difference]: Start difference. First operand has 267 places, 311 transitions, 3265 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:20:26,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 335 transitions, 3991 flow [2024-06-27 20:20:27,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 335 transitions, 3921 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:27,536 INFO L231 Difference]: Finished difference. Result has 269 places, 314 transitions, 3299 flow [2024-06-27 20:20:27,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3299, PETRI_PLACES=269, PETRI_TRANSITIONS=314} [2024-06-27 20:20:27,537 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-27 20:20:27,537 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 314 transitions, 3299 flow [2024-06-27 20:20:27,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:27,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:27,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:27,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:20:27,537 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)] === [2024-06-27 20:20:27,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash -47066424, now seen corresponding path program 1 times [2024-06-27 20:20:27,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:27,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010811009] [2024-06-27 20:20:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:28,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:28,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010811009] [2024-06-27 20:20:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010811009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:28,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:28,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166390174] [2024-06-27 20:20:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:28,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:28,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:28,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:28,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:28,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 314 transitions, 3299 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:28,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:28,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:28,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:29,491 INFO L124 PetriNetUnfolderBase]: 3523/5705 cut-off events. [2024-06-27 20:20:29,491 INFO L125 PetriNetUnfolderBase]: For 1054991/1054991 co-relation queries the response was YES. [2024-06-27 20:20:29,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53478 conditions, 5705 events. 3523/5705 cut-off events. For 1054991/1054991 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34860 event pairs, 836 based on Foata normal form. 1/5706 useless extension candidates. Maximal degree in co-relation 53349. Up to 5337 conditions per place. [2024-06-27 20:20:29,558 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 306 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-27 20:20:29,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 334 transitions, 4049 flow [2024-06-27 20:20:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:20:29,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:20:29,559 INFO L175 Difference]: Start difference. First operand has 269 places, 314 transitions, 3299 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:20:29,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 334 transitions, 4049 flow [2024-06-27 20:20:30,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 334 transitions, 3967 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:30,975 INFO L231 Difference]: Finished difference. Result has 271 places, 317 transitions, 3325 flow [2024-06-27 20:20:30,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=263, 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=3325, PETRI_PLACES=271, PETRI_TRANSITIONS=317} [2024-06-27 20:20:30,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-27 20:20:30,975 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 317 transitions, 3325 flow [2024-06-27 20:20:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:30,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:30,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:30,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:20:30,977 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)] === [2024-06-27 20:20:30,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:30,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1884434927, now seen corresponding path program 2 times [2024-06-27 20:20:30,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:30,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166332481] [2024-06-27 20:20:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:30,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:31,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:31,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166332481] [2024-06-27 20:20:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166332481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:31,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:31,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125728195] [2024-06-27 20:20:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:31,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:31,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:31,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:31,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 317 transitions, 3325 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:31,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:31,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:31,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:32,998 INFO L124 PetriNetUnfolderBase]: 3452/5640 cut-off events. [2024-06-27 20:20:32,998 INFO L125 PetriNetUnfolderBase]: For 1085107/1085107 co-relation queries the response was YES. [2024-06-27 20:20:33,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53713 conditions, 5640 events. 3452/5640 cut-off events. For 1085107/1085107 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34945 event pairs, 804 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 53583. Up to 5104 conditions per place. [2024-06-27 20:20:33,071 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 288 selfloop transitions, 22 changer transitions 0/339 dead transitions. [2024-06-27 20:20:33,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 339 transitions, 4061 flow [2024-06-27 20:20:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:20:33,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:20:33,073 INFO L175 Difference]: Start difference. First operand has 271 places, 317 transitions, 3325 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:20:33,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 339 transitions, 4061 flow [2024-06-27 20:20:34,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 339 transitions, 3975 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:34,878 INFO L231 Difference]: Finished difference. Result has 273 places, 320 transitions, 3361 flow [2024-06-27 20:20:34,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3361, PETRI_PLACES=273, PETRI_TRANSITIONS=320} [2024-06-27 20:20:34,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-27 20:20:34,879 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 320 transitions, 3361 flow [2024-06-27 20:20:34,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:34,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:34,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:34,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:20:34,879 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:34,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1878870520, now seen corresponding path program 2 times [2024-06-27 20:20:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:34,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414558053] [2024-06-27 20:20:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:34,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:35,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:35,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414558053] [2024-06-27 20:20:35,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414558053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:35,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:35,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030658646] [2024-06-27 20:20:35,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:35,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:35,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:35,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 320 transitions, 3361 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:35,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:35,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:35,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:36,898 INFO L124 PetriNetUnfolderBase]: 3546/5739 cut-off events. [2024-06-27 20:20:36,898 INFO L125 PetriNetUnfolderBase]: For 1105100/1105100 co-relation queries the response was YES. [2024-06-27 20:20:36,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55019 conditions, 5739 events. 3546/5739 cut-off events. For 1105100/1105100 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35169 event pairs, 836 based on Foata normal form. 1/5740 useless extension candidates. Maximal degree in co-relation 54888. Up to 5353 conditions per place. [2024-06-27 20:20:36,975 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 29 changer transitions 0/341 dead transitions. [2024-06-27 20:20:36,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 341 transitions, 4381 flow [2024-06-27 20:20:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:20:36,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 20:20:36,976 INFO L175 Difference]: Start difference. First operand has 273 places, 320 transitions, 3361 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:20:36,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 341 transitions, 4381 flow [2024-06-27 20:20:38,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 341 transitions, 4281 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:38,756 INFO L231 Difference]: Finished difference. Result has 275 places, 326 transitions, 3471 flow [2024-06-27 20:20:38,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=275, PETRI_TRANSITIONS=326} [2024-06-27 20:20:38,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-27 20:20:38,756 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 326 transitions, 3471 flow [2024-06-27 20:20:38,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:38,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:38,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:38,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:20:38,757 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:38,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash -683981585, now seen corresponding path program 3 times [2024-06-27 20:20:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:38,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267714621] [2024-06-27 20:20:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:39,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267714621] [2024-06-27 20:20:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267714621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:39,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:39,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828324828] [2024-06-27 20:20:39,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:39,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:39,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:39,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:39,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:39,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 326 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:39,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:39,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:39,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:40,689 INFO L124 PetriNetUnfolderBase]: 3475/5674 cut-off events. [2024-06-27 20:20:40,690 INFO L125 PetriNetUnfolderBase]: For 1138086/1138086 co-relation queries the response was YES. [2024-06-27 20:20:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55253 conditions, 5674 events. 3475/5674 cut-off events. For 1138086/1138086 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35127 event pairs, 804 based on Foata normal form. 2/5676 useless extension candidates. Maximal degree in co-relation 55121. Up to 5119 conditions per place. [2024-06-27 20:20:40,765 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 285 selfloop transitions, 29 changer transitions 0/345 dead transitions. [2024-06-27 20:20:40,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 345 transitions, 4215 flow [2024-06-27 20:20:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:20:40,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:20:40,766 INFO L175 Difference]: Start difference. First operand has 275 places, 326 transitions, 3471 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:20:40,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 345 transitions, 4215 flow [2024-06-27 20:20:42,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 345 transitions, 4115 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:42,056 INFO L231 Difference]: Finished difference. Result has 279 places, 329 transitions, 3515 flow [2024-06-27 20:20:42,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3515, PETRI_PLACES=279, PETRI_TRANSITIONS=329} [2024-06-27 20:20:42,056 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-27 20:20:42,057 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 329 transitions, 3515 flow [2024-06-27 20:20:42,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:42,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:42,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:42,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:20:42,057 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:42,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1878863080, now seen corresponding path program 3 times [2024-06-27 20:20:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:42,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378663229] [2024-06-27 20:20:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:42,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:42,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378663229] [2024-06-27 20:20:42,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378663229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:42,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:42,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348444576] [2024-06-27 20:20:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:42,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:42,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:42,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:42,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 329 transitions, 3515 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:42,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:42,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:42,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:44,077 INFO L124 PetriNetUnfolderBase]: 3553/5751 cut-off events. [2024-06-27 20:20:44,077 INFO L125 PetriNetUnfolderBase]: For 1148961/1148961 co-relation queries the response was YES. [2024-06-27 20:20:44,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56186 conditions, 5751 events. 3553/5751 cut-off events. For 1148961/1148961 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35222 event pairs, 836 based on Foata normal form. 1/5752 useless extension candidates. Maximal degree in co-relation 56052. Up to 5364 conditions per place. [2024-06-27 20:20:44,152 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 302 selfloop transitions, 30 changer transitions 0/343 dead transitions. [2024-06-27 20:20:44,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 343 transitions, 4213 flow [2024-06-27 20:20:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:20:44,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:20:44,153 INFO L175 Difference]: Start difference. First operand has 279 places, 329 transitions, 3515 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:20:44,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 343 transitions, 4213 flow [2024-06-27 20:20:46,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 343 transitions, 4043 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:46,156 INFO L231 Difference]: Finished difference. Result has 281 places, 329 transitions, 3411 flow [2024-06-27 20:20:46,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3411, PETRI_PLACES=281, PETRI_TRANSITIONS=329} [2024-06-27 20:20:46,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-27 20:20:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 329 transitions, 3411 flow [2024-06-27 20:20:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:46,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:46,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:20:46,158 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash -683973649, now seen corresponding path program 1 times [2024-06-27 20:20:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475362740] [2024-06-27 20:20:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:46,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:46,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475362740] [2024-06-27 20:20:46,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475362740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:46,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:46,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:46,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279030393] [2024-06-27 20:20:46,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:46,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:46,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:46,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:46,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 329 transitions, 3411 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:48,053 INFO L124 PetriNetUnfolderBase]: 3397/5559 cut-off events. [2024-06-27 20:20:48,054 INFO L125 PetriNetUnfolderBase]: For 1174901/1174901 co-relation queries the response was YES. [2024-06-27 20:20:48,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 5559 events. 3397/5559 cut-off events. For 1174901/1174901 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34667 event pairs, 800 based on Foata normal form. 2/5513 useless extension candidates. Maximal degree in co-relation 55275. Up to 5052 conditions per place. [2024-06-27 20:20:48,131 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 297 selfloop transitions, 17 changer transitions 0/346 dead transitions. [2024-06-27 20:20:48,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 346 transitions, 4141 flow [2024-06-27 20:20:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:20:48,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:20:48,133 INFO L175 Difference]: Start difference. First operand has 281 places, 329 transitions, 3411 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:20:48,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 346 transitions, 4141 flow [2024-06-27 20:20:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 346 transitions, 4073 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:50,723 INFO L231 Difference]: Finished difference. Result has 282 places, 332 transitions, 3457 flow [2024-06-27 20:20:50,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3457, PETRI_PLACES=282, PETRI_TRANSITIONS=332} [2024-06-27 20:20:50,725 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-27 20:20:50,725 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 332 transitions, 3457 flow [2024-06-27 20:20:50,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:50,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:50,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:20:50,725 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:50,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1147605784, now seen corresponding path program 4 times [2024-06-27 20:20:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483507895] [2024-06-27 20:20:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:51,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483507895] [2024-06-27 20:20:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483507895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:51,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:51,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219215131] [2024-06-27 20:20:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:51,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:51,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:51,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 332 transitions, 3457 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:51,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:51,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:51,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:52,767 INFO L124 PetriNetUnfolderBase]: 3571/5780 cut-off events. [2024-06-27 20:20:52,768 INFO L125 PetriNetUnfolderBase]: For 1198554/1198556 co-relation queries the response was YES. [2024-06-27 20:20:52,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57166 conditions, 5780 events. 3571/5780 cut-off events. For 1198554/1198556 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35455 event pairs, 843 based on Foata normal form. 3/5783 useless extension candidates. Maximal degree in co-relation 57030. Up to 5360 conditions per place. [2024-06-27 20:20:52,847 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 49 changer transitions 0/354 dead transitions. [2024-06-27 20:20:52,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 354 transitions, 4797 flow [2024-06-27 20:20:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:20:52,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:20:52,849 INFO L175 Difference]: Start difference. First operand has 282 places, 332 transitions, 3457 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:20:52,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 354 transitions, 4797 flow [2024-06-27 20:20:55,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 354 transitions, 4705 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:55,510 INFO L231 Difference]: Finished difference. Result has 284 places, 341 transitions, 3715 flow [2024-06-27 20:20:55,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3715, PETRI_PLACES=284, PETRI_TRANSITIONS=341} [2024-06-27 20:20:55,510 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-27 20:20:55,510 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 341 transitions, 3715 flow [2024-06-27 20:20:55,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:20:55,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:55,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:55,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:20:55,511 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)] === [2024-06-27 20:20:55,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:55,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1929176613, now seen corresponding path program 2 times [2024-06-27 20:20:55,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987686544] [2024-06-27 20:20:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987686544] [2024-06-27 20:20:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987686544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:56,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:56,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032731305] [2024-06-27 20:20:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:56,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:56,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:56,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:56,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 341 transitions, 3715 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:56,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:56,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:56,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:57,512 INFO L124 PetriNetUnfolderBase]: 3415/5587 cut-off events. [2024-06-27 20:20:57,512 INFO L125 PetriNetUnfolderBase]: For 1228710/1228712 co-relation queries the response was YES. [2024-06-27 20:20:57,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56839 conditions, 5587 events. 3415/5587 cut-off events. For 1228710/1228712 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34823 event pairs, 804 based on Foata normal form. 4/5543 useless extension candidates. Maximal degree in co-relation 56702. Up to 5042 conditions per place. [2024-06-27 20:20:57,588 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 37 changer transitions 0/359 dead transitions. [2024-06-27 20:20:57,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 359 transitions, 4737 flow [2024-06-27 20:20:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:20:57,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:20:57,589 INFO L175 Difference]: Start difference. First operand has 284 places, 341 transitions, 3715 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:20:57,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 359 transitions, 4737 flow [2024-06-27 20:21:00,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 359 transitions, 4573 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:00,257 INFO L231 Difference]: Finished difference. Result has 288 places, 347 transitions, 3789 flow [2024-06-27 20:21:00,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3789, PETRI_PLACES=288, PETRI_TRANSITIONS=347} [2024-06-27 20:21:00,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-27 20:21:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 347 transitions, 3789 flow [2024-06-27 20:21:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:00,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:21:00,258 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)] === [2024-06-27 20:21:00,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1929168677, now seen corresponding path program 4 times [2024-06-27 20:21:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086043422] [2024-06-27 20:21:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086043422] [2024-06-27 20:21:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086043422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:01,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186680806] [2024-06-27 20:21:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:01,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:01,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:01,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 347 transitions, 3789 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:01,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:01,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:01,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:02,417 INFO L124 PetriNetUnfolderBase]: 3496/5712 cut-off events. [2024-06-27 20:21:02,418 INFO L125 PetriNetUnfolderBase]: For 1252169/1252171 co-relation queries the response was YES. [2024-06-27 20:21:02,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57539 conditions, 5712 events. 3496/5712 cut-off events. For 1252169/1252171 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35424 event pairs, 815 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 57401. Up to 5130 conditions per place. [2024-06-27 20:21:02,493 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 291 selfloop transitions, 38 changer transitions 0/363 dead transitions. [2024-06-27 20:21:02,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 363 transitions, 4565 flow [2024-06-27 20:21:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:21:02,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:21:02,495 INFO L175 Difference]: Start difference. First operand has 288 places, 347 transitions, 3789 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:21:02,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 363 transitions, 4565 flow [2024-06-27 20:21:04,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 363 transitions, 4463 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:04,844 INFO L231 Difference]: Finished difference. Result has 292 places, 350 transitions, 3859 flow [2024-06-27 20:21:04,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3859, PETRI_PLACES=292, PETRI_TRANSITIONS=350} [2024-06-27 20:21:04,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-27 20:21:04,845 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 350 transitions, 3859 flow [2024-06-27 20:21:04,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:04,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:04,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:04,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:21:04,846 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)] === [2024-06-27 20:21:04,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1929168894, now seen corresponding path program 5 times [2024-06-27 20:21:04,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:04,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660609285] [2024-06-27 20:21:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:04,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:05,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:05,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660609285] [2024-06-27 20:21:05,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660609285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:05,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552441837] [2024-06-27 20:21:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:05,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 350 transitions, 3859 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:05,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:05,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:05,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:06,824 INFO L124 PetriNetUnfolderBase]: 3575/5790 cut-off events. [2024-06-27 20:21:06,824 INFO L125 PetriNetUnfolderBase]: For 1263166/1263168 co-relation queries the response was YES. [2024-06-27 20:21:06,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58492 conditions, 5790 events. 3575/5790 cut-off events. For 1263166/1263168 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35486 event pairs, 843 based on Foata normal form. 3/5793 useless extension candidates. Maximal degree in co-relation 58352. Up to 5367 conditions per place. [2024-06-27 20:21:06,911 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 50 changer transitions 0/362 dead transitions. [2024-06-27 20:21:06,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 362 transitions, 4787 flow [2024-06-27 20:21:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:21:06,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 20:21:06,912 INFO L175 Difference]: Start difference. First operand has 292 places, 350 transitions, 3859 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:21:06,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 362 transitions, 4787 flow [2024-06-27 20:21:09,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 362 transitions, 4581 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:09,720 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 3759 flow [2024-06-27 20:21:09,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3759, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2024-06-27 20:21:09,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-27 20:21:09,721 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 3759 flow [2024-06-27 20:21:09,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:09,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:09,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:09,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:21:09,721 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)] === [2024-06-27 20:21:09,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1938699813, now seen corresponding path program 3 times [2024-06-27 20:21:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:09,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815999359] [2024-06-27 20:21:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:09,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815999359] [2024-06-27 20:21:10,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815999359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325575849] [2024-06-27 20:21:10,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:10,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:10,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:10,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:10,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:10,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:11,627 INFO L124 PetriNetUnfolderBase]: 3419/5597 cut-off events. [2024-06-27 20:21:11,627 INFO L125 PetriNetUnfolderBase]: For 1290149/1290151 co-relation queries the response was YES. [2024-06-27 20:21:11,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57713 conditions, 5597 events. 3419/5597 cut-off events. For 1290149/1290151 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34942 event pairs, 804 based on Foata normal form. 4/5553 useless extension candidates. Maximal degree in co-relation 57572. Up to 5048 conditions per place. [2024-06-27 20:21:11,709 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 43 changer transitions 0/365 dead transitions. [2024-06-27 20:21:11,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 365 transitions, 4723 flow [2024-06-27 20:21:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:21:11,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:21:11,710 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 3759 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:21:11,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 365 transitions, 4723 flow [2024-06-27 20:21:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 365 transitions, 4619 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:14,022 INFO L231 Difference]: Finished difference. Result has 296 places, 353 transitions, 3824 flow [2024-06-27 20:21:14,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3824, PETRI_PLACES=296, PETRI_TRANSITIONS=353} [2024-06-27 20:21:14,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-27 20:21:14,022 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 353 transitions, 3824 flow [2024-06-27 20:21:14,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:14,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:21:14,023 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)] === [2024-06-27 20:21:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1938373104, now seen corresponding path program 6 times [2024-06-27 20:21:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122966037] [2024-06-27 20:21:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:14,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:14,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122966037] [2024-06-27 20:21:14,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122966037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:14,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:14,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999849700] [2024-06-27 20:21:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:14,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:14,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:14,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 353 transitions, 3824 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:14,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:14,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:14,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:16,042 INFO L124 PetriNetUnfolderBase]: 3582/5800 cut-off events. [2024-06-27 20:21:16,042 INFO L125 PetriNetUnfolderBase]: For 1305757/1305759 co-relation queries the response was YES. [2024-06-27 20:21:16,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58812 conditions, 5800 events. 3582/5800 cut-off events. For 1305757/1305759 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35558 event pairs, 843 based on Foata normal form. 3/5803 useless extension candidates. Maximal degree in co-relation 58670. Up to 5376 conditions per place. [2024-06-27 20:21:16,127 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 52 changer transitions 0/364 dead transitions. [2024-06-27 20:21:16,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 364 transitions, 4556 flow [2024-06-27 20:21:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:21:16,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:21:16,129 INFO L175 Difference]: Start difference. First operand has 296 places, 353 transitions, 3824 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:21:16,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 364 transitions, 4556 flow [2024-06-27 20:21:19,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 364 transitions, 4367 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:19,338 INFO L231 Difference]: Finished difference. Result has 299 places, 353 transitions, 3745 flow [2024-06-27 20:21:19,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3635, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3745, PETRI_PLACES=299, PETRI_TRANSITIONS=353} [2024-06-27 20:21:19,339 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-27 20:21:19,339 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 353 transitions, 3745 flow [2024-06-27 20:21:19,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:19,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:19,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:19,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:21:19,339 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)] === [2024-06-27 20:21:19,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1929436083, now seen corresponding path program 4 times [2024-06-27 20:21:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:19,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587971925] [2024-06-27 20:21:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:20,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587971925] [2024-06-27 20:21:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587971925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:20,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182588172] [2024-06-27 20:21:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:20,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:20,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 353 transitions, 3745 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:20,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:20,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:20,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:21,297 INFO L124 PetriNetUnfolderBase]: 3415/5590 cut-off events. [2024-06-27 20:21:21,297 INFO L125 PetriNetUnfolderBase]: For 1322717/1322719 co-relation queries the response was YES. [2024-06-27 20:21:21,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57685 conditions, 5590 events. 3415/5590 cut-off events. For 1322717/1322719 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34838 event pairs, 803 based on Foata normal form. 4/5546 useless extension candidates. Maximal degree in co-relation 57542. Up to 5044 conditions per place. [2024-06-27 20:21:21,381 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 288 selfloop transitions, 41 changer transitions 0/364 dead transitions. [2024-06-27 20:21:21,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 364 transitions, 4429 flow [2024-06-27 20:21:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:21:21,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:21:21,382 INFO L175 Difference]: Start difference. First operand has 299 places, 353 transitions, 3745 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:21:21,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 364 transitions, 4429 flow [2024-06-27 20:21:23,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 364 transitions, 4247 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:23,465 INFO L231 Difference]: Finished difference. Result has 299 places, 353 transitions, 3651 flow [2024-06-27 20:21:23,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3651, PETRI_PLACES=299, PETRI_TRANSITIONS=353} [2024-06-27 20:21:23,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-27 20:21:23,466 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 353 transitions, 3651 flow [2024-06-27 20:21:23,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:23,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:23,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:23,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:21:23,467 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)] === [2024-06-27 20:21:23,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711717, now seen corresponding path program 1 times [2024-06-27 20:21:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:23,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004148225] [2024-06-27 20:21:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:23,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004148225] [2024-06-27 20:21:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004148225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:24,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632723530] [2024-06-27 20:21:24,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:24,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:24,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:24,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:24,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 353 transitions, 3651 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:24,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:24,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:25,752 INFO L124 PetriNetUnfolderBase]: 3532/5705 cut-off events. [2024-06-27 20:21:25,752 INFO L125 PetriNetUnfolderBase]: For 1339808/1339808 co-relation queries the response was YES. [2024-06-27 20:21:25,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58540 conditions, 5705 events. 3532/5705 cut-off events. For 1339808/1339808 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35146 event pairs, 830 based on Foata normal form. 1/5658 useless extension candidates. Maximal degree in co-relation 58396. Up to 5312 conditions per place. [2024-06-27 20:21:25,834 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 319 selfloop transitions, 20 changer transitions 0/368 dead transitions. [2024-06-27 20:21:25,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 368 transitions, 4449 flow [2024-06-27 20:21:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:21:25,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-27 20:21:25,835 INFO L175 Difference]: Start difference. First operand has 299 places, 353 transitions, 3651 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:21:25,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 368 transitions, 4449 flow [2024-06-27 20:21:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 368 transitions, 4338 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:28,497 INFO L231 Difference]: Finished difference. Result has 300 places, 356 transitions, 3684 flow [2024-06-27 20:21:28,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3684, PETRI_PLACES=300, PETRI_TRANSITIONS=356} [2024-06-27 20:21:28,498 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-27 20:21:28,498 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 356 transitions, 3684 flow [2024-06-27 20:21:28,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:28,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:28,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:28,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:21:28,498 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)] === [2024-06-27 20:21:28,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash -599703655, now seen corresponding path program 1 times [2024-06-27 20:21:28,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:28,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385885330] [2024-06-27 20:21:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:28,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385885330] [2024-06-27 20:21:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385885330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246424190] [2024-06-27 20:21:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:29,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:29,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 356 transitions, 3684 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:29,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:29,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:29,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:30,525 INFO L124 PetriNetUnfolderBase]: 3465/5647 cut-off events. [2024-06-27 20:21:30,525 INFO L125 PetriNetUnfolderBase]: For 1384900/1384902 co-relation queries the response was YES. [2024-06-27 20:21:30,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58912 conditions, 5647 events. 3465/5647 cut-off events. For 1384900/1384902 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35073 event pairs, 623 based on Foata normal form. 6/5625 useless extension candidates. Maximal degree in co-relation 58767. Up to 4969 conditions per place. [2024-06-27 20:21:30,597 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 309 selfloop transitions, 26 changer transitions 0/387 dead transitions. [2024-06-27 20:21:30,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 387 transitions, 4528 flow [2024-06-27 20:21:30,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 20:21:30,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-27 20:21:30,599 INFO L175 Difference]: Start difference. First operand has 300 places, 356 transitions, 3684 flow. Second operand 8 states and 171 transitions. [2024-06-27 20:21:30,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 387 transitions, 4528 flow [2024-06-27 20:21:32,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 387 transitions, 4336 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:32,742 INFO L231 Difference]: Finished difference. Result has 298 places, 359 transitions, 3660 flow [2024-06-27 20:21:32,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3660, PETRI_PLACES=298, PETRI_TRANSITIONS=359} [2024-06-27 20:21:32,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-27 20:21:32,743 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 359 transitions, 3660 flow [2024-06-27 20:21:32,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:32,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:32,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:21:32,743 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)] === [2024-06-27 20:21:32,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -599347465, now seen corresponding path program 2 times [2024-06-27 20:21:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:32,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466106264] [2024-06-27 20:21:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466106264] [2024-06-27 20:21:33,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466106264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:33,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:33,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211377004] [2024-06-27 20:21:33,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:33,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:33,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:33,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 359 transitions, 3660 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:33,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:33,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:33,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:34,910 INFO L124 PetriNetUnfolderBase]: 3481/5671 cut-off events. [2024-06-27 20:21:34,910 INFO L125 PetriNetUnfolderBase]: For 1411942/1411944 co-relation queries the response was YES. [2024-06-27 20:21:34,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59683 conditions, 5671 events. 3481/5671 cut-off events. For 1411942/1411944 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35403 event pairs, 802 based on Foata normal form. 6/5629 useless extension candidates. Maximal degree in co-relation 59538. Up to 5039 conditions per place. [2024-06-27 20:21:34,997 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 27 changer transitions 0/386 dead transitions. [2024-06-27 20:21:34,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 386 transitions, 4498 flow [2024-06-27 20:21:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 20:21:34,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:21:34,999 INFO L175 Difference]: Start difference. First operand has 298 places, 359 transitions, 3660 flow. Second operand 8 states and 168 transitions. [2024-06-27 20:21:34,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 386 transitions, 4498 flow [2024-06-27 20:21:37,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 386 transitions, 4352 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:37,974 INFO L231 Difference]: Finished difference. Result has 300 places, 362 transitions, 3690 flow [2024-06-27 20:21:37,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=300, PETRI_TRANSITIONS=362} [2024-06-27 20:21:37,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-27 20:21:37,974 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 362 transitions, 3690 flow [2024-06-27 20:21:37,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:37,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:37,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:37,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:21:37,975 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)] === [2024-06-27 20:21:37,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:37,982 INFO L85 PathProgramCache]: Analyzing trace with hash -599334569, now seen corresponding path program 1 times [2024-06-27 20:21:37,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:37,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669344868] [2024-06-27 20:21:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:37,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:38,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669344868] [2024-06-27 20:21:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669344868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:38,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:38,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923810553] [2024-06-27 20:21:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:38,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:38,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:38,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 362 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:38,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:38,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:38,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:40,103 INFO L124 PetriNetUnfolderBase]: 3574/5768 cut-off events. [2024-06-27 20:21:40,103 INFO L125 PetriNetUnfolderBase]: For 1424569/1424571 co-relation queries the response was YES. [2024-06-27 20:21:40,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60452 conditions, 5768 events. 3574/5768 cut-off events. For 1424569/1424571 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35575 event pairs, 833 based on Foata normal form. 4/5724 useless extension candidates. Maximal degree in co-relation 60306. Up to 5291 conditions per place. [2024-06-27 20:21:40,188 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 329 selfloop transitions, 32 changer transitions 0/390 dead transitions. [2024-06-27 20:21:40,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 390 transitions, 4576 flow [2024-06-27 20:21:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:21:40,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:21:40,190 INFO L175 Difference]: Start difference. First operand has 300 places, 362 transitions, 3690 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:21:40,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 390 transitions, 4576 flow [2024-06-27 20:21:42,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 390 transitions, 4422 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:42,410 INFO L231 Difference]: Finished difference. Result has 303 places, 366 transitions, 3719 flow [2024-06-27 20:21:42,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3719, PETRI_PLACES=303, PETRI_TRANSITIONS=366} [2024-06-27 20:21:42,411 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-27 20:21:42,411 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 366 transitions, 3719 flow [2024-06-27 20:21:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:42,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:42,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:42,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:21:42,412 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)] === [2024-06-27 20:21:42,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1012616607, now seen corresponding path program 3 times [2024-06-27 20:21:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:42,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053525325] [2024-06-27 20:21:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:43,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053525325] [2024-06-27 20:21:43,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053525325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:43,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237683244] [2024-06-27 20:21:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:43,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:43,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:43,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 366 transitions, 3719 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:43,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:43,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:43,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:44,587 INFO L124 PetriNetUnfolderBase]: 3505/5707 cut-off events. [2024-06-27 20:21:44,587 INFO L125 PetriNetUnfolderBase]: For 1465859/1465861 co-relation queries the response was YES. [2024-06-27 20:21:44,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60889 conditions, 5707 events. 3505/5707 cut-off events. For 1465859/1465861 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35645 event pairs, 801 based on Foata normal form. 6/5665 useless extension candidates. Maximal degree in co-relation 60742. Up to 5045 conditions per place. [2024-06-27 20:21:44,669 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 39 changer transitions 0/387 dead transitions. [2024-06-27 20:21:44,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 387 transitions, 4553 flow [2024-06-27 20:21:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:21:44,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 20:21:44,671 INFO L175 Difference]: Start difference. First operand has 303 places, 366 transitions, 3719 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:21:44,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 387 transitions, 4553 flow [2024-06-27 20:21:46,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 387 transitions, 4398 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:46,938 INFO L231 Difference]: Finished difference. Result has 304 places, 369 transitions, 3774 flow [2024-06-27 20:21:46,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3774, PETRI_PLACES=304, PETRI_TRANSITIONS=369} [2024-06-27 20:21:46,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-27 20:21:46,939 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 369 transitions, 3774 flow [2024-06-27 20:21:46,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:46,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:46,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:46,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:21:46,939 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)] === [2024-06-27 20:21:46,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1903962087, now seen corresponding path program 1 times [2024-06-27 20:21:46,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:46,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554576841] [2024-06-27 20:21:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:46,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:47,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:47,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554576841] [2024-06-27 20:21:47,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554576841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:47,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:47,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:47,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567633770] [2024-06-27 20:21:47,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:47,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:47,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 369 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:47,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:47,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:47,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:48,974 INFO L124 PetriNetUnfolderBase]: 3691/5938 cut-off events. [2024-06-27 20:21:48,974 INFO L125 PetriNetUnfolderBase]: For 1483088/1483090 co-relation queries the response was YES. [2024-06-27 20:21:49,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62546 conditions, 5938 events. 3691/5938 cut-off events. For 1483088/1483090 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36418 event pairs, 838 based on Foata normal form. 4/5942 useless extension candidates. Maximal degree in co-relation 62398. Up to 5377 conditions per place. [2024-06-27 20:21:49,061 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 328 selfloop transitions, 40 changer transitions 0/396 dead transitions. [2024-06-27 20:21:49,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 396 transitions, 4682 flow [2024-06-27 20:21:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:21:49,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 20:21:49,062 INFO L175 Difference]: Start difference. First operand has 304 places, 369 transitions, 3774 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:21:49,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 396 transitions, 4682 flow [2024-06-27 20:21:52,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 396 transitions, 4494 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:52,327 INFO L231 Difference]: Finished difference. Result has 306 places, 373 transitions, 3795 flow [2024-06-27 20:21:52,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3795, PETRI_PLACES=306, PETRI_TRANSITIONS=373} [2024-06-27 20:21:52,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-27 20:21:52,327 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 373 transitions, 3795 flow [2024-06-27 20:21:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:52,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:52,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:52,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:21:52,328 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)] === [2024-06-27 20:21:52,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash -491313395, now seen corresponding path program 1 times [2024-06-27 20:21:52,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:52,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527510950] [2024-06-27 20:21:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:52,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:53,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:53,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527510950] [2024-06-27 20:21:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527510950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:53,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930174376] [2024-06-27 20:21:53,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:53,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:53,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:53,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 373 transitions, 3795 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:53,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:53,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:53,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:54,416 INFO L124 PetriNetUnfolderBase]: 3610/5820 cut-off events. [2024-06-27 20:21:54,416 INFO L125 PetriNetUnfolderBase]: For 1502463/1502465 co-relation queries the response was YES. [2024-06-27 20:21:54,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62479 conditions, 5820 events. 3610/5820 cut-off events. For 1502463/1502465 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35902 event pairs, 829 based on Foata normal form. 4/5776 useless extension candidates. Maximal degree in co-relation 62330. Up to 5345 conditions per place. [2024-06-27 20:21:54,496 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 340 selfloop transitions, 27 changer transitions 0/397 dead transitions. [2024-06-27 20:21:54,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 397 transitions, 4651 flow [2024-06-27 20:21:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:21:54,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:21:54,497 INFO L175 Difference]: Start difference. First operand has 306 places, 373 transitions, 3795 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:21:54,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 397 transitions, 4651 flow [2024-06-27 20:21:58,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 397 transitions, 4470 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:58,505 INFO L231 Difference]: Finished difference. Result has 308 places, 377 transitions, 3755 flow [2024-06-27 20:21:58,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3755, PETRI_PLACES=308, PETRI_TRANSITIONS=377} [2024-06-27 20:21:58,506 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-27 20:21:58,506 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 377 transitions, 3755 flow [2024-06-27 20:21:58,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:58,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:58,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:21:58,507 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)] === [2024-06-27 20:21:58,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash -491313643, now seen corresponding path program 2 times [2024-06-27 20:21:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:58,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53617948] [2024-06-27 20:21:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:59,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:59,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53617948] [2024-06-27 20:21:59,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53617948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:59,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:59,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:59,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726659765] [2024-06-27 20:21:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:59,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:59,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:59,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:59,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 377 transitions, 3755 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:21:59,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:59,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:59,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:00,799 INFO L124 PetriNetUnfolderBase]: 3711/5966 cut-off events. [2024-06-27 20:22:00,800 INFO L125 PetriNetUnfolderBase]: For 1538181/1538183 co-relation queries the response was YES. [2024-06-27 20:22:00,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63466 conditions, 5966 events. 3711/5966 cut-off events. For 1538181/1538183 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36528 event pairs, 836 based on Foata normal form. 4/5970 useless extension candidates. Maximal degree in co-relation 63316. Up to 5389 conditions per place. [2024-06-27 20:22:00,877 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 325 selfloop transitions, 47 changer transitions 0/401 dead transitions. [2024-06-27 20:22:00,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 401 transitions, 4671 flow [2024-06-27 20:22:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:22:00,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 20:22:00,878 INFO L175 Difference]: Start difference. First operand has 308 places, 377 transitions, 3755 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:22:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 401 transitions, 4671 flow [2024-06-27 20:22:04,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 401 transitions, 4578 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:04,411 INFO L231 Difference]: Finished difference. Result has 310 places, 381 transitions, 3893 flow [2024-06-27 20:22:04,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3893, PETRI_PLACES=310, PETRI_TRANSITIONS=381} [2024-06-27 20:22:04,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-27 20:22:04,412 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 381 transitions, 3893 flow [2024-06-27 20:22:04,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:04,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:04,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:04,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:22:04,412 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)] === [2024-06-27 20:22:04,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1012493475, now seen corresponding path program 3 times [2024-06-27 20:22:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664597803] [2024-06-27 20:22:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:04,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:05,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:05,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664597803] [2024-06-27 20:22:05,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664597803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:05,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:05,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:05,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744003273] [2024-06-27 20:22:05,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:05,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:05,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:05,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:05,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:05,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:05,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 381 transitions, 3893 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:05,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:05,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:06,574 INFO L124 PetriNetUnfolderBase]: 3737/6004 cut-off events. [2024-06-27 20:22:06,574 INFO L125 PetriNetUnfolderBase]: For 1581866/1581868 co-relation queries the response was YES. [2024-06-27 20:22:06,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65023 conditions, 6004 events. 3737/6004 cut-off events. For 1581866/1581868 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36818 event pairs, 837 based on Foata normal form. 4/6008 useless extension candidates. Maximal degree in co-relation 64872. Up to 5360 conditions per place. [2024-06-27 20:22:06,660 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 319 selfloop transitions, 59 changer transitions 0/407 dead transitions. [2024-06-27 20:22:06,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 407 transitions, 5175 flow [2024-06-27 20:22:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:22:06,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:22:06,662 INFO L175 Difference]: Start difference. First operand has 310 places, 381 transitions, 3893 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:22:06,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 407 transitions, 5175 flow [2024-06-27 20:22:09,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 407 transitions, 4972 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:09,602 INFO L231 Difference]: Finished difference. Result has 312 places, 388 transitions, 4037 flow [2024-06-27 20:22:09,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=312, PETRI_TRANSITIONS=388} [2024-06-27 20:22:09,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 267 predicate places. [2024-06-27 20:22:09,603 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 388 transitions, 4037 flow [2024-06-27 20:22:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:09,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:09,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:09,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:22:09,603 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)] === [2024-06-27 20:22:09,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -888784387, now seen corresponding path program 2 times [2024-06-27 20:22:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:09,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767230610] [2024-06-27 20:22:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:10,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767230610] [2024-06-27 20:22:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767230610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974970759] [2024-06-27 20:22:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:10,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:10,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 388 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:10,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:10,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:10,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:11,690 INFO L124 PetriNetUnfolderBase]: 3664/5897 cut-off events. [2024-06-27 20:22:11,691 INFO L125 PetriNetUnfolderBase]: For 1613206/1613208 co-relation queries the response was YES. [2024-06-27 20:22:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65223 conditions, 5897 events. 3664/5897 cut-off events. For 1613206/1613208 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36365 event pairs, 830 based on Foata normal form. 4/5853 useless extension candidates. Maximal degree in co-relation 65071. Up to 5325 conditions per place. [2024-06-27 20:22:11,778 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 324 selfloop transitions, 57 changer transitions 0/414 dead transitions. [2024-06-27 20:22:11,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 414 transitions, 5440 flow [2024-06-27 20:22:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:22:11,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:22:11,808 INFO L175 Difference]: Start difference. First operand has 312 places, 388 transitions, 4037 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:22:11,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 414 transitions, 5440 flow [2024-06-27 20:22:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 414 transitions, 5264 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:14,680 INFO L231 Difference]: Finished difference. Result has 316 places, 395 transitions, 4131 flow [2024-06-27 20:22:14,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4131, PETRI_PLACES=316, PETRI_TRANSITIONS=395} [2024-06-27 20:22:14,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-27 20:22:14,683 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 395 transitions, 4131 flow [2024-06-27 20:22:14,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:14,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:14,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:14,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:22:14,684 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)] === [2024-06-27 20:22:14,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -254841365, now seen corresponding path program 3 times [2024-06-27 20:22:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:14,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307001279] [2024-06-27 20:22:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307001279] [2024-06-27 20:22:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307001279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149016408] [2024-06-27 20:22:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:15,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:15,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:15,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 395 transitions, 4131 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:15,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:15,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:15,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:16,791 INFO L124 PetriNetUnfolderBase]: 3658/5889 cut-off events. [2024-06-27 20:22:16,792 INFO L125 PetriNetUnfolderBase]: For 1626186/1626188 co-relation queries the response was YES. [2024-06-27 20:22:16,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65149 conditions, 5889 events. 3658/5889 cut-off events. For 1626186/1626188 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36319 event pairs, 830 based on Foata normal form. 4/5845 useless extension candidates. Maximal degree in co-relation 64995. Up to 5320 conditions per place. [2024-06-27 20:22:16,883 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 323 selfloop transitions, 57 changer transitions 0/413 dead transitions. [2024-06-27 20:22:16,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 413 transitions, 5161 flow [2024-06-27 20:22:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:22:16,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:22:16,885 INFO L175 Difference]: Start difference. First operand has 316 places, 395 transitions, 4131 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:22:16,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 413 transitions, 5161 flow [2024-06-27 20:22:20,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 413 transitions, 4999 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:20,618 INFO L231 Difference]: Finished difference. Result has 320 places, 395 transitions, 4093 flow [2024-06-27 20:22:20,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4093, PETRI_PLACES=320, PETRI_TRANSITIONS=395} [2024-06-27 20:22:20,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-27 20:22:20,619 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 395 transitions, 4093 flow [2024-06-27 20:22:20,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:22:20,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:20,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:20,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:22:20,619 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:20,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1185394228, now seen corresponding path program 1 times [2024-06-27 20:22:20,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:20,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980063699] [2024-06-27 20:22:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:20,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:21,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980063699] [2024-06-27 20:22:21,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980063699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:21,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:21,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:22:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917255427] [2024-06-27 20:22:21,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:21,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:22:21,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:22:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:22:21,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:21,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 395 transitions, 4093 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:22:21,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:21,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:21,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:23,655 INFO L124 PetriNetUnfolderBase]: 3913/6345 cut-off events. [2024-06-27 20:22:23,655 INFO L125 PetriNetUnfolderBase]: For 1698865/1698867 co-relation queries the response was YES. [2024-06-27 20:22:23,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67567 conditions, 6345 events. 3913/6345 cut-off events. For 1698865/1698867 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39851 event pairs, 856 based on Foata normal form. 12/6357 useless extension candidates. Maximal degree in co-relation 67412. Up to 5001 conditions per place. [2024-06-27 20:22:23,755 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 330 selfloop transitions, 87 changer transitions 0/448 dead transitions. [2024-06-27 20:22:23,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 448 transitions, 5229 flow [2024-06-27 20:22:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:22:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:22:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 20:22:23,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 20:22:23,756 INFO L175 Difference]: Start difference. First operand has 320 places, 395 transitions, 4093 flow. Second operand 10 states and 211 transitions. [2024-06-27 20:22:23,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 448 transitions, 5229 flow [2024-06-27 20:22:29,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 448 transitions, 5137 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:29,201 INFO L231 Difference]: Finished difference. Result has 326 places, 406 transitions, 4366 flow [2024-06-27 20:22:29,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4366, PETRI_PLACES=326, PETRI_TRANSITIONS=406} [2024-06-27 20:22:29,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-27 20:22:29,202 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 406 transitions, 4366 flow [2024-06-27 20:22:29,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:22:29,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:29,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:22:29,203 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)] === [2024-06-27 20:22:29,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1012200091, now seen corresponding path program 2 times [2024-06-27 20:22:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:29,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264403247] [2024-06-27 20:22:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:30,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264403247] [2024-06-27 20:22:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264403247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:30,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:30,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510968799] [2024-06-27 20:22:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:30,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:30,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:30,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:30,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 406 transitions, 4366 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:30,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:30,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:30,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:31,423 INFO L124 PetriNetUnfolderBase]: 3874/6292 cut-off events. [2024-06-27 20:22:31,424 INFO L125 PetriNetUnfolderBase]: For 1723466/1723468 co-relation queries the response was YES. [2024-06-27 20:22:31,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69217 conditions, 6292 events. 3874/6292 cut-off events. For 1723466/1723468 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39936 event pairs, 863 based on Foata normal form. 4/6248 useless extension candidates. Maximal degree in co-relation 69059. Up to 5614 conditions per place. [2024-06-27 20:22:31,519 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 338 selfloop transitions, 68 changer transitions 0/439 dead transitions. [2024-06-27 20:22:31,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 439 transitions, 6100 flow [2024-06-27 20:22:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:22:31,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:22:31,521 INFO L175 Difference]: Start difference. First operand has 326 places, 406 transitions, 4366 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:22:31,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 439 transitions, 6100 flow [2024-06-27 20:22:37,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 439 transitions, 5924 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:22:37,255 INFO L231 Difference]: Finished difference. Result has 329 places, 418 transitions, 4754 flow [2024-06-27 20:22:37,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4754, PETRI_PLACES=329, PETRI_TRANSITIONS=418} [2024-06-27 20:22:37,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-27 20:22:37,256 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 418 transitions, 4754 flow [2024-06-27 20:22:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:37,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:37,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:22:37,256 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)] === [2024-06-27 20:22:37,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1012603711, now seen corresponding path program 3 times [2024-06-27 20:22:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:37,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468457202] [2024-06-27 20:22:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:38,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:38,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468457202] [2024-06-27 20:22:38,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468457202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:38,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:38,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034981778] [2024-06-27 20:22:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:38,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:38,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:38,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 418 transitions, 4754 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:38,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:38,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:38,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:39,623 INFO L124 PetriNetUnfolderBase]: 3876/6294 cut-off events. [2024-06-27 20:22:39,623 INFO L125 PetriNetUnfolderBase]: For 1751752/1751754 co-relation queries the response was YES. [2024-06-27 20:22:39,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69872 conditions, 6294 events. 3876/6294 cut-off events. For 1751752/1751754 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39833 event pairs, 869 based on Foata normal form. 4/6250 useless extension candidates. Maximal degree in co-relation 69714. Up to 5618 conditions per place. [2024-06-27 20:22:39,719 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 336 selfloop transitions, 73 changer transitions 0/442 dead transitions. [2024-06-27 20:22:39,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 442 transitions, 6219 flow [2024-06-27 20:22:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:22:39,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 20:22:39,721 INFO L175 Difference]: Start difference. First operand has 329 places, 418 transitions, 4754 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:22:39,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 442 transitions, 6219 flow [2024-06-27 20:22:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 442 transitions, 5991 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:45,012 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 4816 flow [2024-06-27 20:22:45,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4816, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-27 20:22:45,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-27 20:22:45,012 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 4816 flow [2024-06-27 20:22:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:45,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:45,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:45,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:22:45,013 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)] === [2024-06-27 20:22:45,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1012185645, now seen corresponding path program 1 times [2024-06-27 20:22:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043732154] [2024-06-27 20:22:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:45,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:45,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043732154] [2024-06-27 20:22:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043732154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:45,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000617837] [2024-06-27 20:22:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:45,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:45,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 4816 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:45,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:45,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:45,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:47,307 INFO L124 PetriNetUnfolderBase]: 3881/6300 cut-off events. [2024-06-27 20:22:47,307 INFO L125 PetriNetUnfolderBase]: For 1771083/1771083 co-relation queries the response was YES. [2024-06-27 20:22:47,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70103 conditions, 6300 events. 3881/6300 cut-off events. For 1771083/1771083 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39872 event pairs, 867 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 69943. Up to 5829 conditions per place. [2024-06-27 20:22:47,403 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 390 selfloop transitions, 20 changer transitions 0/443 dead transitions. [2024-06-27 20:22:47,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 443 transitions, 5796 flow [2024-06-27 20:22:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:22:47,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-27 20:22:47,404 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 4816 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:22:47,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 443 transitions, 5796 flow [2024-06-27 20:22:52,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 443 transitions, 5601 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:52,414 INFO L231 Difference]: Finished difference. Result has 337 places, 425 transitions, 4789 flow [2024-06-27 20:22:52,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4789, PETRI_PLACES=337, PETRI_TRANSITIONS=425} [2024-06-27 20:22:52,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-27 20:22:52,415 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 425 transitions, 4789 flow [2024-06-27 20:22:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:52,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:52,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:22:52,416 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)] === [2024-06-27 20:22:52,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 803701981, now seen corresponding path program 4 times [2024-06-27 20:22:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:52,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539769079] [2024-06-27 20:22:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539769079] [2024-06-27 20:22:53,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539769079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:53,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770110547] [2024-06-27 20:22:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:53,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:53,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:53,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 425 transitions, 4789 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:53,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:53,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:54,730 INFO L124 PetriNetUnfolderBase]: 3887/6307 cut-off events. [2024-06-27 20:22:54,730 INFO L125 PetriNetUnfolderBase]: For 1778671/1778673 co-relation queries the response was YES. [2024-06-27 20:22:54,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70221 conditions, 6307 events. 3887/6307 cut-off events. For 1778671/1778673 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39846 event pairs, 868 based on Foata normal form. 4/6263 useless extension candidates. Maximal degree in co-relation 70060. Up to 5623 conditions per place. [2024-06-27 20:22:54,832 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 341 selfloop transitions, 71 changer transitions 0/445 dead transitions. [2024-06-27 20:22:54,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 445 transitions, 6133 flow [2024-06-27 20:22:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:22:54,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:22:54,833 INFO L175 Difference]: Start difference. First operand has 337 places, 425 transitions, 4789 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:22:54,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 445 transitions, 6133 flow [2024-06-27 20:22:59,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 445 transitions, 5907 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:59,613 INFO L231 Difference]: Finished difference. Result has 339 places, 425 transitions, 4713 flow [2024-06-27 20:22:59,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4713, PETRI_PLACES=339, PETRI_TRANSITIONS=425} [2024-06-27 20:22:59,614 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-27 20:22:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 425 transitions, 4713 flow [2024-06-27 20:22:59,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:59,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:59,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:59,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:22:59,614 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)] === [2024-06-27 20:22:59,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash -502812885, now seen corresponding path program 4 times [2024-06-27 20:22:59,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:59,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060158536] [2024-06-27 20:22:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:59,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:00,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:00,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060158536] [2024-06-27 20:23:00,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060158536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:00,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829905743] [2024-06-27 20:23:00,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:00,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:00,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:23:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 425 transitions, 4713 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:00,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:00,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:23:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:01,831 INFO L124 PetriNetUnfolderBase]: 3800/6224 cut-off events. [2024-06-27 20:23:01,832 INFO L125 PetriNetUnfolderBase]: For 1814050/1814052 co-relation queries the response was YES. [2024-06-27 20:23:01,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69869 conditions, 6224 events. 3800/6224 cut-off events. For 1814050/1814052 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39781 event pairs, 867 based on Foata normal form. 6/6181 useless extension candidates. Maximal degree in co-relation 69707. Up to 5440 conditions per place. [2024-06-27 20:23:01,929 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 325 selfloop transitions, 56 changer transitions 0/440 dead transitions. [2024-06-27 20:23:01,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 440 transitions, 5645 flow [2024-06-27 20:23:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:23:01,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:23:01,931 INFO L175 Difference]: Start difference. First operand has 339 places, 425 transitions, 4713 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:23:01,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 440 transitions, 5645 flow [2024-06-27 20:23:07,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 440 transitions, 5472 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:07,103 INFO L231 Difference]: Finished difference. Result has 339 places, 428 transitions, 4806 flow [2024-06-27 20:23:07,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4806, PETRI_PLACES=339, PETRI_TRANSITIONS=428} [2024-06-27 20:23:07,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-27 20:23:07,104 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 428 transitions, 4806 flow [2024-06-27 20:23:07,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:07,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:07,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:07,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:23:07,104 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)] === [2024-06-27 20:23:07,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2127532283, now seen corresponding path program 4 times [2024-06-27 20:23:07,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:07,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704497810] [2024-06-27 20:23:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:07,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:07,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704497810] [2024-06-27 20:23:07,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704497810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:07,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:07,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349323379] [2024-06-27 20:23:07,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:07,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:07,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:07,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:07,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 428 transitions, 4806 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:07,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:07,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:07,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:09,416 INFO L124 PetriNetUnfolderBase]: 3971/6424 cut-off events. [2024-06-27 20:23:09,417 INFO L125 PetriNetUnfolderBase]: For 1825276/1825276 co-relation queries the response was YES. [2024-06-27 20:23:09,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71422 conditions, 6424 events. 3971/6424 cut-off events. For 1825276/1825276 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40340 event pairs, 898 based on Foata normal form. 1/6424 useless extension candidates. Maximal degree in co-relation 71260. Up to 5820 conditions per place. [2024-06-27 20:23:09,518 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 378 selfloop transitions, 42 changer transitions 0/451 dead transitions. [2024-06-27 20:23:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 451 transitions, 5806 flow [2024-06-27 20:23:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:23:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:23:09,520 INFO L175 Difference]: Start difference. First operand has 339 places, 428 transitions, 4806 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:23:09,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 451 transitions, 5806 flow [2024-06-27 20:23:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 5562 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:14,062 INFO L231 Difference]: Finished difference. Result has 341 places, 431 transitions, 4768 flow [2024-06-27 20:23:14,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4768, PETRI_PLACES=341, PETRI_TRANSITIONS=431} [2024-06-27 20:23:14,062 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-27 20:23:14,062 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 431 transitions, 4768 flow [2024-06-27 20:23:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:14,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:14,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:23:14,063 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)] === [2024-06-27 20:23:14,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -325674509, now seen corresponding path program 5 times [2024-06-27 20:23:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104890212] [2024-06-27 20:23:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:14,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:14,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104890212] [2024-06-27 20:23:14,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104890212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:14,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:14,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:14,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120194714] [2024-06-27 20:23:14,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:14,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:14,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:14,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:14,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 431 transitions, 4768 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:14,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:14,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:16,424 INFO L124 PetriNetUnfolderBase]: 3976/6431 cut-off events. [2024-06-27 20:23:16,425 INFO L125 PetriNetUnfolderBase]: For 1853068/1853068 co-relation queries the response was YES. [2024-06-27 20:23:16,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71589 conditions, 6431 events. 3976/6431 cut-off events. For 1853068/1853068 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40349 event pairs, 898 based on Foata normal form. 1/6431 useless extension candidates. Maximal degree in co-relation 71426. Up to 5817 conditions per place. [2024-06-27 20:23:16,521 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 374 selfloop transitions, 50 changer transitions 0/455 dead transitions. [2024-06-27 20:23:16,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 455 transitions, 6134 flow [2024-06-27 20:23:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:23:16,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:23:16,523 INFO L175 Difference]: Start difference. First operand has 341 places, 431 transitions, 4768 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:23:16,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 455 transitions, 6134 flow [2024-06-27 20:23:20,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 455 transitions, 5954 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:20,765 INFO L231 Difference]: Finished difference. Result has 343 places, 437 transitions, 4932 flow [2024-06-27 20:23:20,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4932, PETRI_PLACES=343, PETRI_TRANSITIONS=437} [2024-06-27 20:23:20,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-27 20:23:20,766 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 437 transitions, 4932 flow [2024-06-27 20:23:20,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:20,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:20,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:23:20,767 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)] === [2024-06-27 20:23:20,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -142144363, now seen corresponding path program 4 times [2024-06-27 20:23:20,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984024284] [2024-06-27 20:23:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:21,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:21,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984024284] [2024-06-27 20:23:21,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984024284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:21,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:21,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:21,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622835232] [2024-06-27 20:23:21,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:21,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:21,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:21,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:21,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:21,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:21,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 437 transitions, 4932 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:21,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:21,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:21,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:22,983 INFO L124 PetriNetUnfolderBase]: 3893/6320 cut-off events. [2024-06-27 20:23:22,984 INFO L125 PetriNetUnfolderBase]: For 1868777/1868777 co-relation queries the response was YES. [2024-06-27 20:23:23,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71012 conditions, 6320 events. 3893/6320 cut-off events. For 1868777/1868777 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39942 event pairs, 883 based on Foata normal form. 1/6272 useless extension candidates. Maximal degree in co-relation 70848. Up to 5770 conditions per place. [2024-06-27 20:23:23,084 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 392 selfloop transitions, 26 changer transitions 0/454 dead transitions. [2024-06-27 20:23:23,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 454 transitions, 5810 flow [2024-06-27 20:23:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:23:23,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:23:23,085 INFO L175 Difference]: Start difference. First operand has 343 places, 437 transitions, 4932 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:23:23,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 454 transitions, 5810 flow [2024-06-27 20:23:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 454 transitions, 5615 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:28,452 INFO L231 Difference]: Finished difference. Result has 347 places, 437 transitions, 4795 flow [2024-06-27 20:23:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4795, PETRI_PLACES=347, PETRI_TRANSITIONS=437} [2024-06-27 20:23:28,453 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-27 20:23:28,453 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 437 transitions, 4795 flow [2024-06-27 20:23:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:23:28,453 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)] === [2024-06-27 20:23:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash 85577049, now seen corresponding path program 6 times [2024-06-27 20:23:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:28,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691644984] [2024-06-27 20:23:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:28,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:29,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691644984] [2024-06-27 20:23:29,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691644984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:29,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:29,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023387887] [2024-06-27 20:23:29,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:29,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:29,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:29,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 437 transitions, 4795 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:29,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:29,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:29,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:30,651 INFO L124 PetriNetUnfolderBase]: 3966/6416 cut-off events. [2024-06-27 20:23:30,651 INFO L125 PetriNetUnfolderBase]: For 1895903/1895903 co-relation queries the response was YES. [2024-06-27 20:23:30,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71665 conditions, 6416 events. 3966/6416 cut-off events. For 1895903/1895903 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40276 event pairs, 898 based on Foata normal form. 1/6416 useless extension candidates. Maximal degree in co-relation 71499. Up to 5815 conditions per place. [2024-06-27 20:23:30,752 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 43 changer transitions 0/457 dead transitions. [2024-06-27 20:23:30,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 457 transitions, 5697 flow [2024-06-27 20:23:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:23:30,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:23:30,753 INFO L175 Difference]: Start difference. First operand has 347 places, 437 transitions, 4795 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:23:30,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 457 transitions, 5697 flow [2024-06-27 20:23:34,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 457 transitions, 5412 flow, removed 52 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:34,827 INFO L231 Difference]: Finished difference. Result has 345 places, 437 transitions, 4602 flow [2024-06-27 20:23:34,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4602, PETRI_PLACES=345, PETRI_TRANSITIONS=437} [2024-06-27 20:23:34,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-27 20:23:34,828 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 437 transitions, 4602 flow [2024-06-27 20:23:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:34,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:34,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:23:34,829 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)] === [2024-06-27 20:23:34,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1712051481, now seen corresponding path program 7 times [2024-06-27 20:23:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847331923] [2024-06-27 20:23:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:35,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847331923] [2024-06-27 20:23:35,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847331923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:35,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:35,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:35,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923932582] [2024-06-27 20:23:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:35,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:35,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:35,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 437 transitions, 4602 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:35,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:35,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:37,147 INFO L124 PetriNetUnfolderBase]: 3971/6423 cut-off events. [2024-06-27 20:23:37,147 INFO L125 PetriNetUnfolderBase]: For 1925105/1925105 co-relation queries the response was YES. [2024-06-27 20:23:37,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71941 conditions, 6423 events. 3971/6423 cut-off events. For 1925105/1925105 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40314 event pairs, 897 based on Foata normal form. 1/6423 useless extension candidates. Maximal degree in co-relation 71774. Up to 5807 conditions per place. [2024-06-27 20:23:37,243 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 371 selfloop transitions, 55 changer transitions 0/457 dead transitions. [2024-06-27 20:23:37,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 457 transitions, 5618 flow [2024-06-27 20:23:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:23:37,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:23:37,244 INFO L175 Difference]: Start difference. First operand has 345 places, 437 transitions, 4602 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:23:37,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 457 transitions, 5618 flow [2024-06-27 20:23:41,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 457 transitions, 5514 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:41,780 INFO L231 Difference]: Finished difference. Result has 346 places, 440 transitions, 4742 flow [2024-06-27 20:23:41,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4742, PETRI_PLACES=346, PETRI_TRANSITIONS=440} [2024-06-27 20:23:41,781 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-27 20:23:41,781 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 440 transitions, 4742 flow [2024-06-27 20:23:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:41,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:41,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:41,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:23:41,782 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:41,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash 312860797, now seen corresponding path program 5 times [2024-06-27 20:23:41,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:41,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254229217] [2024-06-27 20:23:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:41,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:42,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254229217] [2024-06-27 20:23:42,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254229217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:42,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:42,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:42,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842184810] [2024-06-27 20:23:42,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:42,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:42,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:42,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:42,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 440 transitions, 4742 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:42,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:42,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:42,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:43,990 INFO L124 PetriNetUnfolderBase]: 3908/6331 cut-off events. [2024-06-27 20:23:43,990 INFO L125 PetriNetUnfolderBase]: For 1956214/1956214 co-relation queries the response was YES. [2024-06-27 20:23:44,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72103 conditions, 6331 events. 3908/6331 cut-off events. For 1956214/1956214 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39968 event pairs, 881 based on Foata normal form. 1/6283 useless extension candidates. Maximal degree in co-relation 71935. Up to 5762 conditions per place. [2024-06-27 20:23:44,092 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 379 selfloop transitions, 45 changer transitions 0/461 dead transitions. [2024-06-27 20:23:44,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 461 transitions, 6023 flow [2024-06-27 20:23:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:23:44,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:23:44,094 INFO L175 Difference]: Start difference. First operand has 346 places, 440 transitions, 4742 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:23:44,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 461 transitions, 6023 flow [2024-06-27 20:23:48,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 461 transitions, 5801 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:48,732 INFO L231 Difference]: Finished difference. Result has 349 places, 446 transitions, 4783 flow [2024-06-27 20:23:48,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4783, PETRI_PLACES=349, PETRI_TRANSITIONS=446} [2024-06-27 20:23:48,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-27 20:23:48,732 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 446 transitions, 4783 flow [2024-06-27 20:23:48,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:48,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:48,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:48,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:23:48,733 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)] === [2024-06-27 20:23:48,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1884304221, now seen corresponding path program 8 times [2024-06-27 20:23:48,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:48,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527762475] [2024-06-27 20:23:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:48,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:49,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:49,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527762475] [2024-06-27 20:23:49,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527762475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:49,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:49,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243809626] [2024-06-27 20:23:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:49,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:49,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:49,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 446 transitions, 4783 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:49,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:49,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:49,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:51,030 INFO L124 PetriNetUnfolderBase]: 3997/6459 cut-off events. [2024-06-27 20:23:51,030 INFO L125 PetriNetUnfolderBase]: For 2005697/2005697 co-relation queries the response was YES. [2024-06-27 20:23:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73423 conditions, 6459 events. 3997/6459 cut-off events. For 2005697/2005697 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40513 event pairs, 896 based on Foata normal form. 1/6459 useless extension candidates. Maximal degree in co-relation 73253. Up to 5804 conditions per place. [2024-06-27 20:23:51,134 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 356 selfloop transitions, 78 changer transitions 0/467 dead transitions. [2024-06-27 20:23:51,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 467 transitions, 6195 flow [2024-06-27 20:23:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:23:51,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:23:51,136 INFO L175 Difference]: Start difference. First operand has 349 places, 446 transitions, 4783 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:23:51,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 467 transitions, 6195 flow [2024-06-27 20:23:56,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 467 transitions, 6061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:56,398 INFO L231 Difference]: Finished difference. Result has 352 places, 452 transitions, 5073 flow [2024-06-27 20:23:56,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5073, PETRI_PLACES=352, PETRI_TRANSITIONS=452} [2024-06-27 20:23:56,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-27 20:23:56,398 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 452 transitions, 5073 flow [2024-06-27 20:23:56,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:56,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:56,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:56,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:23:56,399 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)] === [2024-06-27 20:23:56,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:56,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1884541371, now seen corresponding path program 9 times [2024-06-27 20:23:56,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:56,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433078714] [2024-06-27 20:23:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:57,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:57,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433078714] [2024-06-27 20:23:57,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433078714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:57,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:57,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828523162] [2024-06-27 20:23:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:57,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:57,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:57,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:57,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 452 transitions, 5073 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:23:57,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:57,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:58,782 INFO L124 PetriNetUnfolderBase]: 3996/6459 cut-off events. [2024-06-27 20:23:58,782 INFO L125 PetriNetUnfolderBase]: For 2030287/2030287 co-relation queries the response was YES. [2024-06-27 20:23:58,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73835 conditions, 6459 events. 3996/6459 cut-off events. For 2030287/2030287 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40580 event pairs, 897 based on Foata normal form. 1/6459 useless extension candidates. Maximal degree in co-relation 73664. Up to 5803 conditions per place. [2024-06-27 20:23:58,885 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 354 selfloop transitions, 79 changer transitions 0/466 dead transitions. [2024-06-27 20:23:58,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 466 transitions, 5973 flow [2024-06-27 20:23:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:23:58,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:23:58,888 INFO L175 Difference]: Start difference. First operand has 352 places, 452 transitions, 5073 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:23:58,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 466 transitions, 5973 flow [2024-06-27 20:24:05,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 466 transitions, 5657 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:05,583 INFO L231 Difference]: Finished difference. Result has 356 places, 452 transitions, 4921 flow [2024-06-27 20:24:05,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4757, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4921, PETRI_PLACES=356, PETRI_TRANSITIONS=452} [2024-06-27 20:24:05,583 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-27 20:24:05,583 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 452 transitions, 4921 flow [2024-06-27 20:24:05,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:24:05,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:05,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:05,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:24:05,584 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)] === [2024-06-27 20:24:05,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1884779699, now seen corresponding path program 6 times [2024-06-27 20:24:05,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:05,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707087252] [2024-06-27 20:24:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707087252] [2024-06-27 20:24:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707087252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:06,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:06,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047859129] [2024-06-27 20:24:06,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:06,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:06,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:06,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:06,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 452 transitions, 4921 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:24:06,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:06,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:06,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:07,783 INFO L124 PetriNetUnfolderBase]: 3915/6343 cut-off events. [2024-06-27 20:24:07,783 INFO L125 PetriNetUnfolderBase]: For 2041520/2041520 co-relation queries the response was YES. [2024-06-27 20:24:07,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73090 conditions, 6343 events. 3915/6343 cut-off events. For 2041520/2041520 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39979 event pairs, 882 based on Foata normal form. 1/6295 useless extension candidates. Maximal degree in co-relation 72917. Up to 5769 conditions per place. [2024-06-27 20:24:07,883 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 380 selfloop transitions, 47 changer transitions 0/466 dead transitions. [2024-06-27 20:24:07,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 466 transitions, 5809 flow [2024-06-27 20:24:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:24:07,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:24:07,884 INFO L175 Difference]: Start difference. First operand has 356 places, 452 transitions, 4921 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:24:07,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 466 transitions, 5809 flow [2024-06-27 20:24:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 466 transitions, 5587 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:13,275 INFO L231 Difference]: Finished difference. Result has 357 places, 452 transitions, 4799 flow [2024-06-27 20:24:13,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4799, PETRI_PLACES=357, PETRI_TRANSITIONS=452} [2024-06-27 20:24:13,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-27 20:24:13,275 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 452 transitions, 4799 flow [2024-06-27 20:24:13,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:24:13,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:13,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:13,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:24:13,276 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:13,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1053876684, now seen corresponding path program 2 times [2024-06-27 20:24:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:13,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224040624] [2024-06-27 20:24:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:14,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224040624] [2024-06-27 20:24:14,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224040624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:14,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:14,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:24:14,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471140611] [2024-06-27 20:24:14,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:14,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:24:14,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:24:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:24:14,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:14,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 452 transitions, 4799 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:14,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:14,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:14,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:16,320 INFO L124 PetriNetUnfolderBase]: 4101/6674 cut-off events. [2024-06-27 20:24:16,320 INFO L125 PetriNetUnfolderBase]: For 2136493/2136495 co-relation queries the response was YES. [2024-06-27 20:24:16,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75116 conditions, 6674 events. 4101/6674 cut-off events. For 2136493/2136495 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42548 event pairs, 905 based on Foata normal form. 14/6687 useless extension candidates. Maximal degree in co-relation 74942. Up to 5596 conditions per place. [2024-06-27 20:24:16,426 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 378 selfloop transitions, 86 changer transitions 0/497 dead transitions. [2024-06-27 20:24:16,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 497 transitions, 5976 flow [2024-06-27 20:24:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 20:24:16,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-27 20:24:16,428 INFO L175 Difference]: Start difference. First operand has 357 places, 452 transitions, 4799 flow. Second operand 10 states and 207 transitions. [2024-06-27 20:24:16,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 497 transitions, 5976 flow [2024-06-27 20:24:22,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 497 transitions, 5878 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:22,127 INFO L231 Difference]: Finished difference. Result has 362 places, 458 transitions, 4992 flow [2024-06-27 20:24:22,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4701, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4992, PETRI_PLACES=362, PETRI_TRANSITIONS=458} [2024-06-27 20:24:22,127 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-27 20:24:22,127 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 458 transitions, 4992 flow [2024-06-27 20:24:22,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:22,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:22,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:24:22,128 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:22,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -251412360, now seen corresponding path program 3 times [2024-06-27 20:24:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089514210] [2024-06-27 20:24:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:23,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089514210] [2024-06-27 20:24:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089514210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:23,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:23,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:24:23,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961358358] [2024-06-27 20:24:23,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:23,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:24:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:24:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:24:23,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:23,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 458 transitions, 4992 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:23,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:23,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:23,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:25,000 INFO L124 PetriNetUnfolderBase]: 4183/6826 cut-off events. [2024-06-27 20:24:25,000 INFO L125 PetriNetUnfolderBase]: For 2174503/2174505 co-relation queries the response was YES. [2024-06-27 20:24:25,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76842 conditions, 6826 events. 4183/6826 cut-off events. For 2174503/2174505 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43995 event pairs, 930 based on Foata normal form. 14/6839 useless extension candidates. Maximal degree in co-relation 76665. Up to 5738 conditions per place. [2024-06-27 20:24:25,124 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 375 selfloop transitions, 97 changer transitions 0/505 dead transitions. [2024-06-27 20:24:25,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 505 transitions, 6224 flow [2024-06-27 20:24:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:24:25,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 20:24:25,126 INFO L175 Difference]: Start difference. First operand has 362 places, 458 transitions, 4992 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:24:25,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 505 transitions, 6224 flow [2024-06-27 20:24:33,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 505 transitions, 6031 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:24:33,394 INFO L231 Difference]: Finished difference. Result has 369 places, 467 transitions, 5180 flow [2024-06-27 20:24:33,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5180, PETRI_PLACES=369, PETRI_TRANSITIONS=467} [2024-06-27 20:24:33,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-27 20:24:33,395 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 467 transitions, 5180 flow [2024-06-27 20:24:33,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:33,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:33,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:33,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:24:33,396 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:33,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2111539320, now seen corresponding path program 4 times [2024-06-27 20:24:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121369694] [2024-06-27 20:24:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:34,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:34,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121369694] [2024-06-27 20:24:34,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121369694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:34,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:24:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225419233] [2024-06-27 20:24:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:24:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:24:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:24:34,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:34,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 467 transitions, 5180 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:34,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:34,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:34,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:36,619 INFO L124 PetriNetUnfolderBase]: 4245/6956 cut-off events. [2024-06-27 20:24:36,619 INFO L125 PetriNetUnfolderBase]: For 2146499/2146501 co-relation queries the response was YES. [2024-06-27 20:24:36,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76652 conditions, 6956 events. 4245/6956 cut-off events. For 2146499/2146501 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45297 event pairs, 946 based on Foata normal form. 14/6969 useless extension candidates. Maximal degree in co-relation 76472. Up to 5756 conditions per place. [2024-06-27 20:24:36,728 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 385 selfloop transitions, 89 changer transitions 0/507 dead transitions. [2024-06-27 20:24:36,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 507 transitions, 6310 flow [2024-06-27 20:24:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 20:24:36,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 20:24:36,729 INFO L175 Difference]: Start difference. First operand has 369 places, 467 transitions, 5180 flow. Second operand 10 states and 208 transitions. [2024-06-27 20:24:36,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 507 transitions, 6310 flow [2024-06-27 20:24:43,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 507 transitions, 6151 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:43,359 INFO L231 Difference]: Finished difference. Result has 376 places, 469 transitions, 5248 flow [2024-06-27 20:24:43,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5248, PETRI_PLACES=376, PETRI_TRANSITIONS=469} [2024-06-27 20:24:43,359 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-27 20:24:43,359 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 469 transitions, 5248 flow [2024-06-27 20:24:43,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:43,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:43,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:43,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:24:43,360 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:43,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash 73328760, now seen corresponding path program 5 times [2024-06-27 20:24:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:43,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339817436] [2024-06-27 20:24:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339817436] [2024-06-27 20:24:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339817436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:44,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:44,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:24:44,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763321359] [2024-06-27 20:24:44,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:44,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:24:44,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:24:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:24:44,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:44,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 469 transitions, 5248 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:44,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:44,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:44,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:46,531 INFO L124 PetriNetUnfolderBase]: 4229/6928 cut-off events. [2024-06-27 20:24:46,531 INFO L125 PetriNetUnfolderBase]: For 2138187/2138205 co-relation queries the response was YES. [2024-06-27 20:24:46,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75216 conditions, 6928 events. 4229/6928 cut-off events. For 2138187/2138205 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44988 event pairs, 868 based on Foata normal form. 14/6939 useless extension candidates. Maximal degree in co-relation 75034. Up to 4783 conditions per place. [2024-06-27 20:24:46,644 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 361 selfloop transitions, 113 changer transitions 0/507 dead transitions. [2024-06-27 20:24:46,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 507 transitions, 6232 flow [2024-06-27 20:24:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 20:24:46,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:24:46,646 INFO L175 Difference]: Start difference. First operand has 376 places, 469 transitions, 5248 flow. Second operand 10 states and 205 transitions. [2024-06-27 20:24:46,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 507 transitions, 6232 flow [2024-06-27 20:24:52,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 507 transitions, 5854 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 20:24:52,903 INFO L231 Difference]: Finished difference. Result has 376 places, 468 transitions, 4982 flow [2024-06-27 20:24:52,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4982, PETRI_PLACES=376, PETRI_TRANSITIONS=468} [2024-06-27 20:24:52,904 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-27 20:24:52,904 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 468 transitions, 4982 flow [2024-06-27 20:24:52,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 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) [2024-06-27 20:24:52,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:52,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:52,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:24:52,905 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)] === [2024-06-27 20:24:52,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1038426973, now seen corresponding path program 10 times [2024-06-27 20:24:52,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:52,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817841561] [2024-06-27 20:24:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:52,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:53,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817841561] [2024-06-27 20:24:53,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817841561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:53,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922461581] [2024-06-27 20:24:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:53,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:53,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:53,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:53,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 468 transitions, 4982 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:24:53,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:53,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:53,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:55,229 INFO L124 PetriNetUnfolderBase]: 4235/6939 cut-off events. [2024-06-27 20:24:55,229 INFO L125 PetriNetUnfolderBase]: For 2097553/2097555 co-relation queries the response was YES. [2024-06-27 20:24:55,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74822 conditions, 6939 events. 4235/6939 cut-off events. For 2097553/2097555 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45111 event pairs, 979 based on Foata normal form. 4/6942 useless extension candidates. Maximal degree in co-relation 74641. Up to 6102 conditions per place. [2024-06-27 20:24:55,342 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 361 selfloop transitions, 95 changer transitions 0/489 dead transitions. [2024-06-27 20:24:55,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 489 transitions, 6776 flow [2024-06-27 20:24:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:24:55,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:24:55,344 INFO L175 Difference]: Start difference. First operand has 376 places, 468 transitions, 4982 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:24:55,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 489 transitions, 6776 flow [2024-06-27 20:25:02,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 489 transitions, 6453 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 20:25:02,651 INFO L231 Difference]: Finished difference. Result has 375 places, 475 transitions, 5126 flow [2024-06-27 20:25:02,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4659, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5126, PETRI_PLACES=375, PETRI_TRANSITIONS=475} [2024-06-27 20:25:02,652 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-27 20:25:02,652 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 475 transitions, 5126 flow [2024-06-27 20:25:02,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:02,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:02,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:02,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:25:02,652 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)] === [2024-06-27 20:25:02,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -668114243, now seen corresponding path program 7 times [2024-06-27 20:25:02,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:02,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940270495] [2024-06-27 20:25:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:02,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:03,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:03,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940270495] [2024-06-27 20:25:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940270495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:03,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599066976] [2024-06-27 20:25:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:03,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:03,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 475 transitions, 5126 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:03,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:03,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:03,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:04,984 INFO L124 PetriNetUnfolderBase]: 4185/6856 cut-off events. [2024-06-27 20:25:04,984 INFO L125 PetriNetUnfolderBase]: For 2142762/2142764 co-relation queries the response was YES. [2024-06-27 20:25:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74489 conditions, 6856 events. 4185/6856 cut-off events. For 2142762/2142764 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44725 event pairs, 944 based on Foata normal form. 4/6811 useless extension candidates. Maximal degree in co-relation 74308. Up to 6041 conditions per place. [2024-06-27 20:25:05,101 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 351 selfloop transitions, 106 changer transitions 0/498 dead transitions. [2024-06-27 20:25:05,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 498 transitions, 6857 flow [2024-06-27 20:25:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:25:05,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:25:05,103 INFO L175 Difference]: Start difference. First operand has 375 places, 475 transitions, 5126 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:25:05,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 498 transitions, 6857 flow [2024-06-27 20:25:10,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 498 transitions, 6543 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:10,864 INFO L231 Difference]: Finished difference. Result has 379 places, 485 transitions, 5305 flow [2024-06-27 20:25:10,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5305, PETRI_PLACES=379, PETRI_TRANSITIONS=485} [2024-06-27 20:25:10,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-27 20:25:10,864 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 485 transitions, 5305 flow [2024-06-27 20:25:10,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:10,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:10,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:10,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:25:10,865 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)] === [2024-06-27 20:25:10,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1038723891, now seen corresponding path program 8 times [2024-06-27 20:25:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:10,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042785752] [2024-06-27 20:25:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:11,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:11,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042785752] [2024-06-27 20:25:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042785752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:11,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:11,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:11,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518064134] [2024-06-27 20:25:11,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:11,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:11,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:11,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 485 transitions, 5305 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:11,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:11,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:11,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:13,169 INFO L124 PetriNetUnfolderBase]: 4179/6850 cut-off events. [2024-06-27 20:25:13,169 INFO L125 PetriNetUnfolderBase]: For 2148463/2148465 co-relation queries the response was YES. [2024-06-27 20:25:13,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73897 conditions, 6850 events. 4179/6850 cut-off events. For 2148463/2148465 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44723 event pairs, 944 based on Foata normal form. 4/6805 useless extension candidates. Maximal degree in co-relation 73714. Up to 6036 conditions per place. [2024-06-27 20:25:13,282 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 354 selfloop transitions, 103 changer transitions 0/498 dead transitions. [2024-06-27 20:25:13,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 498 transitions, 6789 flow [2024-06-27 20:25:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:25:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:25:13,284 INFO L175 Difference]: Start difference. First operand has 379 places, 485 transitions, 5305 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:25:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 498 transitions, 6789 flow [2024-06-27 20:25:19,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 498 transitions, 6566 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:19,421 INFO L231 Difference]: Finished difference. Result has 383 places, 485 transitions, 5297 flow [2024-06-27 20:25:19,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5297, PETRI_PLACES=383, PETRI_TRANSITIONS=485} [2024-06-27 20:25:19,436 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-27 20:25:19,436 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 485 transitions, 5297 flow [2024-06-27 20:25:19,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:19,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:19,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:19,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:25:19,437 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)] === [2024-06-27 20:25:19,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash -45696805, now seen corresponding path program 9 times [2024-06-27 20:25:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607041091] [2024-06-27 20:25:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:20,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:20,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607041091] [2024-06-27 20:25:20,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607041091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:20,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:20,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:20,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231122391] [2024-06-27 20:25:20,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:20,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:20,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 485 transitions, 5297 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:20,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:20,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:20,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:21,868 INFO L124 PetriNetUnfolderBase]: 4173/6840 cut-off events. [2024-06-27 20:25:21,868 INFO L125 PetriNetUnfolderBase]: For 2160086/2160088 co-relation queries the response was YES. [2024-06-27 20:25:21,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73702 conditions, 6840 events. 4173/6840 cut-off events. For 2160086/2160088 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44624 event pairs, 944 based on Foata normal form. 4/6795 useless extension candidates. Maximal degree in co-relation 73518. Up to 6031 conditions per place. [2024-06-27 20:25:21,987 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 108 changer transitions 0/498 dead transitions. [2024-06-27 20:25:21,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 498 transitions, 6785 flow [2024-06-27 20:25:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:25:21,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:25:21,989 INFO L175 Difference]: Start difference. First operand has 383 places, 485 transitions, 5297 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:25:21,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 498 transitions, 6785 flow [2024-06-27 20:25:29,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 498 transitions, 6503 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:29,608 INFO L231 Difference]: Finished difference. Result has 386 places, 485 transitions, 5239 flow [2024-06-27 20:25:29,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5239, PETRI_PLACES=386, PETRI_TRANSITIONS=485} [2024-06-27 20:25:29,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-27 20:25:29,608 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 485 transitions, 5239 flow [2024-06-27 20:25:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:29,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:29,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:25:29,609 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)] === [2024-06-27 20:25:29,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash -39982885, now seen corresponding path program 10 times [2024-06-27 20:25:29,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:29,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947855162] [2024-06-27 20:25:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:29,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947855162] [2024-06-27 20:25:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947855162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:30,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930468604] [2024-06-27 20:25:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:30,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:30,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 485 transitions, 5239 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:30,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:30,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:30,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:32,031 INFO L124 PetriNetUnfolderBase]: 4178/6849 cut-off events. [2024-06-27 20:25:32,031 INFO L125 PetriNetUnfolderBase]: For 2178497/2178499 co-relation queries the response was YES. [2024-06-27 20:25:32,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73928 conditions, 6849 events. 4178/6849 cut-off events. For 2178497/2178499 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44741 event pairs, 945 based on Foata normal form. 3/6803 useless extension candidates. Maximal degree in co-relation 73743. Up to 6035 conditions per place. [2024-06-27 20:25:32,143 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 341 selfloop transitions, 118 changer transitions 0/500 dead transitions. [2024-06-27 20:25:32,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 500 transitions, 6546 flow [2024-06-27 20:25:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:25:32,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:25:32,144 INFO L175 Difference]: Start difference. First operand has 386 places, 485 transitions, 5239 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:25:32,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 500 transitions, 6546 flow [2024-06-27 20:25:39,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 500 transitions, 6330 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:39,331 INFO L231 Difference]: Finished difference. Result has 388 places, 488 transitions, 5354 flow [2024-06-27 20:25:39,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5354, PETRI_PLACES=388, PETRI_TRANSITIONS=488} [2024-06-27 20:25:39,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-27 20:25:39,337 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 488 transitions, 5354 flow [2024-06-27 20:25:39,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:39,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:39,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:39,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:25:39,337 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)] === [2024-06-27 20:25:39,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash -325082755, now seen corresponding path program 11 times [2024-06-27 20:25:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196711526] [2024-06-27 20:25:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:40,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:40,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196711526] [2024-06-27 20:25:40,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196711526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:40,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:40,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:40,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000237036] [2024-06-27 20:25:40,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:40,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:40,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:40,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:40,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:40,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 488 transitions, 5354 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:40,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:40,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:40,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:41,823 INFO L124 PetriNetUnfolderBase]: 4173/6841 cut-off events. [2024-06-27 20:25:41,823 INFO L125 PetriNetUnfolderBase]: For 2201971/2201973 co-relation queries the response was YES. [2024-06-27 20:25:41,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73975 conditions, 6841 events. 4173/6841 cut-off events. For 2201971/2201973 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44662 event pairs, 944 based on Foata normal form. 3/6795 useless extension candidates. Maximal degree in co-relation 73789. Up to 6030 conditions per place. [2024-06-27 20:25:41,950 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 338 selfloop transitions, 121 changer transitions 0/500 dead transitions. [2024-06-27 20:25:41,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 500 transitions, 6576 flow [2024-06-27 20:25:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:25:41,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:25:41,951 INFO L175 Difference]: Start difference. First operand has 388 places, 488 transitions, 5354 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:25:41,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 500 transitions, 6576 flow [2024-06-27 20:25:49,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 500 transitions, 6311 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:49,302 INFO L231 Difference]: Finished difference. Result has 391 places, 488 transitions, 5337 flow [2024-06-27 20:25:49,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5337, PETRI_PLACES=391, PETRI_TRANSITIONS=488} [2024-06-27 20:25:49,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-27 20:25:49,317 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 488 transitions, 5337 flow [2024-06-27 20:25:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:49,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:49,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:49,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:25:49,317 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)] === [2024-06-27 20:25:49,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash -325321083, now seen corresponding path program 11 times [2024-06-27 20:25:49,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:49,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136920470] [2024-06-27 20:25:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:49,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:50,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:50,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136920470] [2024-06-27 20:25:50,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136920470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:50,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:50,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:50,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932726296] [2024-06-27 20:25:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:50,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:50,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 488 transitions, 5337 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:50,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:50,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:50,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:51,924 INFO L124 PetriNetUnfolderBase]: 4253/6962 cut-off events. [2024-06-27 20:25:51,924 INFO L125 PetriNetUnfolderBase]: For 2242825/2242827 co-relation queries the response was YES. [2024-06-27 20:25:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75068 conditions, 6962 events. 4253/6962 cut-off events. For 2242825/2242827 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45244 event pairs, 979 based on Foata normal form. 3/6964 useless extension candidates. Maximal degree in co-relation 74881. Up to 6119 conditions per place. [2024-06-27 20:25:52,039 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 364 selfloop transitions, 106 changer transitions 0/507 dead transitions. [2024-06-27 20:25:52,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 507 transitions, 7123 flow [2024-06-27 20:25:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:25:52,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:25:52,041 INFO L175 Difference]: Start difference. First operand has 391 places, 488 transitions, 5337 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:25:52,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 507 transitions, 7123 flow [2024-06-27 20:25:59,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 507 transitions, 6746 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 20:25:59,149 INFO L231 Difference]: Finished difference. Result has 389 places, 494 transitions, 5440 flow [2024-06-27 20:25:59,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5440, PETRI_PLACES=389, PETRI_TRANSITIONS=494} [2024-06-27 20:25:59,149 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-27 20:25:59,149 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 494 transitions, 5440 flow [2024-06-27 20:25:59,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:59,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:59,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:59,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:25:59,150 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)] === [2024-06-27 20:25:59,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:59,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1582150831, now seen corresponding path program 12 times [2024-06-27 20:25:59,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:59,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568239441] [2024-06-27 20:25:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:59,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568239441] [2024-06-27 20:25:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568239441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:59,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367087278] [2024-06-27 20:25:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:59,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:59,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 494 transitions, 5440 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:25:59,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:59,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:59,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:01,544 INFO L124 PetriNetUnfolderBase]: 4251/6961 cut-off events. [2024-06-27 20:26:01,545 INFO L125 PetriNetUnfolderBase]: For 2266300/2266302 co-relation queries the response was YES. [2024-06-27 20:26:01,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75065 conditions, 6961 events. 4251/6961 cut-off events. For 2266300/2266302 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45258 event pairs, 979 based on Foata normal form. 3/6963 useless extension candidates. Maximal degree in co-relation 74879. Up to 6118 conditions per place. [2024-06-27 20:26:01,659 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 365 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-27 20:26:01,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 506 transitions, 6686 flow [2024-06-27 20:26:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:26:01,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:26:01,660 INFO L175 Difference]: Start difference. First operand has 389 places, 494 transitions, 5440 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:26:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 506 transitions, 6686 flow [2024-06-27 20:26:10,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 506 transitions, 6381 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:10,333 INFO L231 Difference]: Finished difference. Result has 393 places, 494 transitions, 5349 flow [2024-06-27 20:26:10,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5135, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5349, PETRI_PLACES=393, PETRI_TRANSITIONS=494} [2024-06-27 20:26:10,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 348 predicate places. [2024-06-27 20:26:10,334 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 494 transitions, 5349 flow [2024-06-27 20:26:10,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:26:10,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:10,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:10,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:26:10,334 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)] === [2024-06-27 20:26:10,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash -325557985, now seen corresponding path program 12 times [2024-06-27 20:26:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:10,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119201156] [2024-06-27 20:26:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:10,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119201156] [2024-06-27 20:26:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119201156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:11,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449992152] [2024-06-27 20:26:11,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:11,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:11,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:11,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:11,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:11,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:11,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 494 transitions, 5349 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:26:11,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:11,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:11,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:12,700 INFO L124 PetriNetUnfolderBase]: 4170/6836 cut-off events. [2024-06-27 20:26:12,700 INFO L125 PetriNetUnfolderBase]: For 2270157/2270159 co-relation queries the response was YES. [2024-06-27 20:26:12,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74066 conditions, 6836 events. 4170/6836 cut-off events. For 2270157/2270159 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44635 event pairs, 944 based on Foata normal form. 3/6790 useless extension candidates. Maximal degree in co-relation 73879. Up to 6027 conditions per place. [2024-06-27 20:26:12,814 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 342 selfloop transitions, 120 changer transitions 0/505 dead transitions. [2024-06-27 20:26:12,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 505 transitions, 6299 flow [2024-06-27 20:26:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:26:12,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:26:12,816 INFO L175 Difference]: Start difference. First operand has 393 places, 494 transitions, 5349 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:26:12,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 505 transitions, 6299 flow [2024-06-27 20:26:18,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 505 transitions, 6085 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:18,711 INFO L231 Difference]: Finished difference. Result has 395 places, 494 transitions, 5381 flow [2024-06-27 20:26:18,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5135, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=395, PETRI_TRANSITIONS=494} [2024-06-27 20:26:18,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-27 20:26:18,712 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 494 transitions, 5381 flow [2024-06-27 20:26:18,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:26:18,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:18,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:18,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:26:18,712 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)] === [2024-06-27 20:26:18,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1511620273, now seen corresponding path program 2 times [2024-06-27 20:26:18,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:18,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741458664] [2024-06-27 20:26:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:18,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:19,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741458664] [2024-06-27 20:26:19,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741458664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:19,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641417413] [2024-06-27 20:26:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:19,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:19,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 494 transitions, 5381 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:19,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:19,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:19,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:21,378 INFO L124 PetriNetUnfolderBase]: 4175/6840 cut-off events. [2024-06-27 20:26:21,378 INFO L125 PetriNetUnfolderBase]: For 2302553/2302553 co-relation queries the response was YES. [2024-06-27 20:26:21,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74439 conditions, 6840 events. 4175/6840 cut-off events. For 2302553/2302553 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44640 event pairs, 910 based on Foata normal form. 1/6793 useless extension candidates. Maximal degree in co-relation 74251. Up to 6304 conditions per place. [2024-06-27 20:26:21,495 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 446 selfloop transitions, 20 changer transitions 0/509 dead transitions. [2024-06-27 20:26:21,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 509 transitions, 6473 flow [2024-06-27 20:26:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:26:21,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-27 20:26:21,496 INFO L175 Difference]: Start difference. First operand has 395 places, 494 transitions, 5381 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:26:21,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 509 transitions, 6473 flow [2024-06-27 20:26:29,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 509 transitions, 6076 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 20:26:29,696 INFO L231 Difference]: Finished difference. Result has 393 places, 497 transitions, 5168 flow [2024-06-27 20:26:29,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5168, PETRI_PLACES=393, PETRI_TRANSITIONS=497} [2024-06-27 20:26:29,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 348 predicate places. [2024-06-27 20:26:29,697 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 497 transitions, 5168 flow [2024-06-27 20:26:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:29,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:29,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:29,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:26:29,697 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)] === [2024-06-27 20:26:29,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1511085027, now seen corresponding path program 5 times [2024-06-27 20:26:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:29,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478092419] [2024-06-27 20:26:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:29,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:30,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:30,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478092419] [2024-06-27 20:26:30,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478092419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:30,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130685281] [2024-06-27 20:26:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:30,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:30,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:30,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:30,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 497 transitions, 5168 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:30,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:30,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:30,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:32,105 INFO L124 PetriNetUnfolderBase]: 4203/6887 cut-off events. [2024-06-27 20:26:32,105 INFO L125 PetriNetUnfolderBase]: For 2360193/2360195 co-relation queries the response was YES. [2024-06-27 20:26:32,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75427 conditions, 6887 events. 4203/6887 cut-off events. For 2360193/2360195 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45016 event pairs, 942 based on Foata normal form. 4/6842 useless extension candidates. Maximal degree in co-relation 75238. Up to 5916 conditions per place. [2024-06-27 20:26:32,223 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 345 selfloop transitions, 144 changer transitions 0/532 dead transitions. [2024-06-27 20:26:32,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 532 transitions, 7270 flow [2024-06-27 20:26:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:26:32,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 20:26:32,224 INFO L175 Difference]: Start difference. First operand has 393 places, 497 transitions, 5168 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:26:32,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 532 transitions, 7270 flow [2024-06-27 20:26:38,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 532 transitions, 7108 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:38,371 INFO L231 Difference]: Finished difference. Result has 397 places, 516 transitions, 5790 flow [2024-06-27 20:26:38,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5790, PETRI_PLACES=397, PETRI_TRANSITIONS=516} [2024-06-27 20:26:38,379 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-27 20:26:38,379 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 516 transitions, 5790 flow [2024-06-27 20:26:38,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:38,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:38,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:38,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:26:38,379 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)] === [2024-06-27 20:26:38,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash -30031203, now seen corresponding path program 3 times [2024-06-27 20:26:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:38,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70538944] [2024-06-27 20:26:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:38,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:39,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:39,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70538944] [2024-06-27 20:26:39,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70538944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:39,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:39,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:39,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722133870] [2024-06-27 20:26:39,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:39,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:39,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:39,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:39,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 516 transitions, 5790 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:39,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:39,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:39,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:41,191 INFO L124 PetriNetUnfolderBase]: 4208/6891 cut-off events. [2024-06-27 20:26:41,192 INFO L125 PetriNetUnfolderBase]: For 2393457/2393461 co-relation queries the response was YES. [2024-06-27 20:26:41,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76875 conditions, 6891 events. 4208/6891 cut-off events. For 2393457/2393461 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44905 event pairs, 917 based on Foata normal form. 5/6848 useless extension candidates. Maximal degree in co-relation 76683. Up to 6296 conditions per place. [2024-06-27 20:26:41,296 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 440 selfloop transitions, 52 changer transitions 0/535 dead transitions. [2024-06-27 20:26:41,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 535 transitions, 7376 flow [2024-06-27 20:26:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:26:41,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-27 20:26:41,298 INFO L175 Difference]: Start difference. First operand has 397 places, 516 transitions, 5790 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:26:41,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 535 transitions, 7376 flow [2024-06-27 20:26:48,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 535 transitions, 7046 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:48,886 INFO L231 Difference]: Finished difference. Result has 402 places, 522 transitions, 5860 flow [2024-06-27 20:26:48,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5860, PETRI_PLACES=402, PETRI_TRANSITIONS=522} [2024-06-27 20:26:48,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-27 20:26:48,886 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 522 transitions, 5860 flow [2024-06-27 20:26:48,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:48,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:48,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:48,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:26:48,887 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)] === [2024-06-27 20:26:48,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash -502396369, now seen corresponding path program 6 times [2024-06-27 20:26:48,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:48,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959422914] [2024-06-27 20:26:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:48,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:49,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:49,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959422914] [2024-06-27 20:26:49,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959422914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:49,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:49,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878248311] [2024-06-27 20:26:49,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:49,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:49,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:49,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:49,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:49,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 522 transitions, 5860 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:49,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:49,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:49,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:51,424 INFO L124 PetriNetUnfolderBase]: 4258/6968 cut-off events. [2024-06-27 20:26:51,424 INFO L125 PetriNetUnfolderBase]: For 2491418/2491420 co-relation queries the response was YES. [2024-06-27 20:26:51,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78335 conditions, 6968 events. 4258/6968 cut-off events. For 2491418/2491420 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 45570 event pairs, 942 based on Foata normal form. 4/6923 useless extension candidates. Maximal degree in co-relation 78141. Up to 5969 conditions per place. [2024-06-27 20:26:51,541 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 376 selfloop transitions, 135 changer transitions 0/554 dead transitions. [2024-06-27 20:26:51,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 554 transitions, 8688 flow [2024-06-27 20:26:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:26:51,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 20:26:51,542 INFO L175 Difference]: Start difference. First operand has 402 places, 522 transitions, 5860 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:26:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 554 transitions, 8688 flow [2024-06-27 20:26:57,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 554 transitions, 8492 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:57,865 INFO L231 Difference]: Finished difference. Result has 408 places, 535 transitions, 6395 flow [2024-06-27 20:26:57,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6395, PETRI_PLACES=408, PETRI_TRANSITIONS=535} [2024-06-27 20:26:57,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-27 20:26:57,865 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 535 transitions, 6395 flow [2024-06-27 20:26:57,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:57,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:57,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:26:57,866 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)] === [2024-06-27 20:26:57,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1495430337, now seen corresponding path program 7 times [2024-06-27 20:26:57,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:57,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210543806] [2024-06-27 20:26:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:57,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:58,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210543806] [2024-06-27 20:26:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210543806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:58,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:58,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844992481] [2024-06-27 20:26:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:58,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:58,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:58,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:58,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 535 transitions, 6395 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:58,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:58,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:58,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:00,426 INFO L124 PetriNetUnfolderBase]: 4270/6987 cut-off events. [2024-06-27 20:27:00,427 INFO L125 PetriNetUnfolderBase]: For 2528598/2528600 co-relation queries the response was YES. [2024-06-27 20:27:00,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79433 conditions, 6987 events. 4270/6987 cut-off events. For 2528598/2528600 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45656 event pairs, 943 based on Foata normal form. 4/6942 useless extension candidates. Maximal degree in co-relation 79235. Up to 5982 conditions per place. [2024-06-27 20:27:00,553 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 372 selfloop transitions, 142 changer transitions 0/557 dead transitions. [2024-06-27 20:27:00,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 557 transitions, 8690 flow [2024-06-27 20:27:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:27:00,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:27:00,554 INFO L175 Difference]: Start difference. First operand has 408 places, 535 transitions, 6395 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:27:00,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 557 transitions, 8690 flow [2024-06-27 20:27:08,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 557 transitions, 8400 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-27 20:27:08,458 INFO L231 Difference]: Finished difference. Result has 415 places, 540 transitions, 6623 flow [2024-06-27 20:27:08,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6118, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6623, PETRI_PLACES=415, PETRI_TRANSITIONS=540} [2024-06-27 20:27:08,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-27 20:27:08,459 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 540 transitions, 6623 flow [2024-06-27 20:27:08,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:08,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:08,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:08,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:27:08,459 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)] === [2024-06-27 20:27:08,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash -791508131, now seen corresponding path program 4 times [2024-06-27 20:27:08,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123484376] [2024-06-27 20:27:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:09,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:09,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123484376] [2024-06-27 20:27:09,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123484376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:09,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:09,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641817090] [2024-06-27 20:27:09,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:09,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:09,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:09,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:09,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:09,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:09,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 540 transitions, 6623 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:11,205 INFO L124 PetriNetUnfolderBase]: 4275/6993 cut-off events. [2024-06-27 20:27:11,205 INFO L125 PetriNetUnfolderBase]: For 2555441/2555445 co-relation queries the response was YES. [2024-06-27 20:27:11,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79750 conditions, 6993 events. 4275/6993 cut-off events. For 2555441/2555445 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45693 event pairs, 918 based on Foata normal form. 5/6950 useless extension candidates. Maximal degree in co-relation 79550. Up to 6388 conditions per place. [2024-06-27 20:27:11,339 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 460 selfloop transitions, 53 changer transitions 0/556 dead transitions. [2024-06-27 20:27:11,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 556 transitions, 8101 flow [2024-06-27 20:27:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:27:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:27:11,341 INFO L175 Difference]: Start difference. First operand has 415 places, 540 transitions, 6623 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:27:11,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 556 transitions, 8101 flow [2024-06-27 20:27:22,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 556 transitions, 7747 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:22,551 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 6509 flow [2024-06-27 20:27:22,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6509, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-27 20:27:22,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-27 20:27:22,552 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 6509 flow [2024-06-27 20:27:22,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:22,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:22,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:27:22,552 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)] === [2024-06-27 20:27:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1495416387, now seen corresponding path program 8 times [2024-06-27 20:27:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141190122] [2024-06-27 20:27:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141190122] [2024-06-27 20:27:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141190122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:23,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067895081] [2024-06-27 20:27:23,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:23,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:23,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:23,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 6509 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:23,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:23,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:25,368 INFO L124 PetriNetUnfolderBase]: 4277/6997 cut-off events. [2024-06-27 20:27:25,369 INFO L125 PetriNetUnfolderBase]: For 2585438/2585440 co-relation queries the response was YES. [2024-06-27 20:27:25,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79373 conditions, 6997 events. 4277/6997 cut-off events. For 2585438/2585440 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45784 event pairs, 937 based on Foata normal form. 4/6952 useless extension candidates. Maximal degree in co-relation 79172. Up to 5993 conditions per place. [2024-06-27 20:27:25,487 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 369 selfloop transitions, 150 changer transitions 0/562 dead transitions. [2024-06-27 20:27:25,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 562 transitions, 8384 flow [2024-06-27 20:27:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:27:25,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-27 20:27:25,489 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 6509 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:27:25,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 562 transitions, 8384 flow [2024-06-27 20:27:34,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 562 transitions, 8190 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:34,910 INFO L231 Difference]: Finished difference. Result has 421 places, 547 transitions, 6761 flow [2024-06-27 20:27:34,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6761, PETRI_PLACES=421, PETRI_TRANSITIONS=547} [2024-06-27 20:27:34,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-27 20:27:34,911 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 547 transitions, 6761 flow [2024-06-27 20:27:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:34,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:34,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:27:34,912 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)] === [2024-06-27 20:27:34,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1038734307, now seen corresponding path program 9 times [2024-06-27 20:27:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953719123] [2024-06-27 20:27:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:35,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:35,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953719123] [2024-06-27 20:27:35,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953719123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:35,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:35,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:35,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494960820] [2024-06-27 20:27:35,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:35,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:35,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:35,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:35,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:35,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 547 transitions, 6761 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:35,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:35,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:35,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:37,569 INFO L124 PetriNetUnfolderBase]: 4273/6993 cut-off events. [2024-06-27 20:27:37,569 INFO L125 PetriNetUnfolderBase]: For 2595374/2595376 co-relation queries the response was YES. [2024-06-27 20:27:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79584 conditions, 6993 events. 4273/6993 cut-off events. For 2595374/2595376 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45732 event pairs, 942 based on Foata normal form. 4/6948 useless extension candidates. Maximal degree in co-relation 79382. Up to 5991 conditions per place. [2024-06-27 20:27:37,696 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 380 selfloop transitions, 140 changer transitions 0/563 dead transitions. [2024-06-27 20:27:37,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 563 transitions, 8807 flow [2024-06-27 20:27:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:27:37,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:27:37,697 INFO L175 Difference]: Start difference. First operand has 421 places, 547 transitions, 6761 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:27:37,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 563 transitions, 8807 flow [2024-06-27 20:27:47,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 563 transitions, 8339 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:47,674 INFO L231 Difference]: Finished difference. Result has 424 places, 547 transitions, 6581 flow [2024-06-27 20:27:47,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6581, PETRI_PLACES=424, PETRI_TRANSITIONS=547} [2024-06-27 20:27:47,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-27 20:27:47,674 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 547 transitions, 6581 flow [2024-06-27 20:27:47,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:47,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:47,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:47,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:27:47,675 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)] === [2024-06-27 20:27:47,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1038734803, now seen corresponding path program 5 times [2024-06-27 20:27:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573304912] [2024-06-27 20:27:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:48,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:48,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573304912] [2024-06-27 20:27:48,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573304912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:48,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:48,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72233208] [2024-06-27 20:27:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:48,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:48,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:48,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 547 transitions, 6581 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:48,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:48,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:48,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:50,493 INFO L124 PetriNetUnfolderBase]: 4270/6988 cut-off events. [2024-06-27 20:27:50,493 INFO L125 PetriNetUnfolderBase]: For 2610732/2610736 co-relation queries the response was YES. [2024-06-27 20:27:50,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79358 conditions, 6988 events. 4270/6988 cut-off events. For 2610732/2610736 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45671 event pairs, 917 based on Foata normal form. 5/6945 useless extension candidates. Maximal degree in co-relation 79155. Up to 6383 conditions per place. [2024-06-27 20:27:50,624 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 464 selfloop transitions, 52 changer transitions 0/559 dead transitions. [2024-06-27 20:27:50,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 559 transitions, 7641 flow [2024-06-27 20:27:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:27:50,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:27:50,625 INFO L175 Difference]: Start difference. First operand has 424 places, 547 transitions, 6581 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:27:50,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 559 transitions, 7641 flow [2024-06-27 20:28:01,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 559 transitions, 7240 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:01,508 INFO L231 Difference]: Finished difference. Result has 425 places, 547 transitions, 6290 flow [2024-06-27 20:28:01,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6290, PETRI_PLACES=425, PETRI_TRANSITIONS=547} [2024-06-27 20:28:01,509 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-27 20:28:01,509 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 547 transitions, 6290 flow [2024-06-27 20:28:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:01,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:01,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:01,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:28:01,510 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)] === [2024-06-27 20:28:01,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1038316737, now seen corresponding path program 10 times [2024-06-27 20:28:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663759403] [2024-06-27 20:28:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:02,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:02,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663759403] [2024-06-27 20:28:02,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663759403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:02,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:02,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438970410] [2024-06-27 20:28:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:02,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:28:02,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 547 transitions, 6290 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:02,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:02,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:28:02,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:04,320 INFO L124 PetriNetUnfolderBase]: 4272/6992 cut-off events. [2024-06-27 20:28:04,321 INFO L125 PetriNetUnfolderBase]: For 2641857/2641859 co-relation queries the response was YES. [2024-06-27 20:28:04,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78966 conditions, 6992 events. 4272/6992 cut-off events. For 2641857/2641859 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45725 event pairs, 942 based on Foata normal form. 4/6947 useless extension candidates. Maximal degree in co-relation 78763. Up to 5991 conditions per place. [2024-06-27 20:28:04,447 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 362 selfloop transitions, 160 changer transitions 0/565 dead transitions. [2024-06-27 20:28:04,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 565 transitions, 8115 flow [2024-06-27 20:28:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:28:04,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:28:04,448 INFO L175 Difference]: Start difference. First operand has 425 places, 547 transitions, 6290 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:28:04,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 565 transitions, 8115 flow [2024-06-27 20:28:13,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 565 transitions, 7945 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:13,432 INFO L231 Difference]: Finished difference. Result has 425 places, 551 transitions, 6594 flow [2024-06-27 20:28:13,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6594, PETRI_PLACES=425, PETRI_TRANSITIONS=551} [2024-06-27 20:28:13,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-27 20:28:13,432 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 551 transitions, 6594 flow [2024-06-27 20:28:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:13,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:13,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:13,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:28:13,433 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:13,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1395409031, now seen corresponding path program 1 times [2024-06-27 20:28:13,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:13,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691199706] [2024-06-27 20:28:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:13,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:14,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691199706] [2024-06-27 20:28:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691199706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825996647] [2024-06-27 20:28:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:14,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:14,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:28:14,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 551 transitions, 6594 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:14,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:14,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:28:14,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:16,292 INFO L124 PetriNetUnfolderBase]: 4233/6989 cut-off events. [2024-06-27 20:28:16,292 INFO L125 PetriNetUnfolderBase]: For 2667382/2667382 co-relation queries the response was YES. [2024-06-27 20:28:16,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79343 conditions, 6989 events. 4233/6989 cut-off events. For 2667382/2667382 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46019 event pairs, 880 based on Foata normal form. 1/6990 useless extension candidates. Maximal degree in co-relation 79139. Up to 6252 conditions per place. [2024-06-27 20:28:16,430 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 500 selfloop transitions, 20 changer transitions 0/578 dead transitions. [2024-06-27 20:28:16,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 578 transitions, 7804 flow [2024-06-27 20:28:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:28:16,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:28:16,431 INFO L175 Difference]: Start difference. First operand has 425 places, 551 transitions, 6594 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:28:16,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 578 transitions, 7804 flow [2024-06-27 20:28:27,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 578 transitions, 7442 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:27,027 INFO L231 Difference]: Finished difference. Result has 428 places, 554 transitions, 6394 flow [2024-06-27 20:28:27,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6232, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6394, PETRI_PLACES=428, PETRI_TRANSITIONS=554} [2024-06-27 20:28:27,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-27 20:28:27,028 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 554 transitions, 6394 flow [2024-06-27 20:28:27,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:27,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:27,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:27,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:28:27,029 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:27,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1707418965, now seen corresponding path program 1 times [2024-06-27 20:28:27,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:27,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597702097] [2024-06-27 20:28:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:27,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597702097] [2024-06-27 20:28:27,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597702097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:27,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:27,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685628809] [2024-06-27 20:28:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:27,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:27,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:28:27,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 554 transitions, 6394 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:27,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:27,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:28:27,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:29,725 INFO L124 PetriNetUnfolderBase]: 4341/7101 cut-off events. [2024-06-27 20:28:29,726 INFO L125 PetriNetUnfolderBase]: For 2705709/2705709 co-relation queries the response was YES. [2024-06-27 20:28:29,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80172 conditions, 7101 events. 4341/7101 cut-off events. For 2705709/2705709 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46253 event pairs, 911 based on Foata normal form. 2/7103 useless extension candidates. Maximal degree in co-relation 79967. Up to 6532 conditions per place. [2024-06-27 20:28:29,843 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 534 selfloop transitions, 20 changer transitions 0/580 dead transitions. [2024-06-27 20:28:29,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 580 transitions, 7652 flow [2024-06-27 20:28:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:28:29,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 20:28:29,844 INFO L175 Difference]: Start difference. First operand has 428 places, 554 transitions, 6394 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:28:29,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 580 transitions, 7652 flow [2024-06-27 20:28:39,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 580 transitions, 7510 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:39,269 INFO L231 Difference]: Finished difference. Result has 430 places, 557 transitions, 6390 flow [2024-06-27 20:28:39,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6390, PETRI_PLACES=430, PETRI_TRANSITIONS=557} [2024-06-27 20:28:39,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-27 20:28:39,270 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 557 transitions, 6390 flow [2024-06-27 20:28:39,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:39,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:39,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:39,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:28:39,271 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:39,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash 98925153, now seen corresponding path program 2 times [2024-06-27 20:28:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:39,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279662890] [2024-06-27 20:28:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:40,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:40,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279662890] [2024-06-27 20:28:40,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279662890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:40,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:40,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:40,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585003097] [2024-06-27 20:28:40,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:40,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:28:40,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 557 transitions, 6390 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:40,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:40,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:28:40,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:41,831 INFO L124 PetriNetUnfolderBase]: 4367/7139 cut-off events. [2024-06-27 20:28:41,831 INFO L125 PetriNetUnfolderBase]: For 2768312/2768312 co-relation queries the response was YES. [2024-06-27 20:28:41,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81581 conditions, 7139 events. 4367/7139 cut-off events. For 2768312/2768312 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46478 event pairs, 911 based on Foata normal form. 2/7141 useless extension candidates. Maximal degree in co-relation 81375. Up to 6539 conditions per place. [2024-06-27 20:28:41,966 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 526 selfloop transitions, 33 changer transitions 0/585 dead transitions. [2024-06-27 20:28:41,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 585 transitions, 8064 flow [2024-06-27 20:28:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:28:41,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:28:41,967 INFO L175 Difference]: Start difference. First operand has 430 places, 557 transitions, 6390 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:28:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 585 transitions, 8064 flow [2024-06-27 20:28:50,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 585 transitions, 7948 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:50,259 INFO L231 Difference]: Finished difference. Result has 432 places, 563 transitions, 6536 flow [2024-06-27 20:28:50,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6536, PETRI_PLACES=432, PETRI_TRANSITIONS=563} [2024-06-27 20:28:50,259 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-27 20:28:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 563 transitions, 6536 flow [2024-06-27 20:28:50,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:50,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:50,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:28:50,260 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:50,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1712067353, now seen corresponding path program 1 times [2024-06-27 20:28:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572006184] [2024-06-27 20:28:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:51,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:51,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572006184] [2024-06-27 20:28:51,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572006184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:51,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:51,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:51,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303651886] [2024-06-27 20:28:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:51,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:51,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:51,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:28:51,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 563 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:51,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:51,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:28:51,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:53,331 INFO L124 PetriNetUnfolderBase]: 4372/7148 cut-off events. [2024-06-27 20:28:53,331 INFO L125 PetriNetUnfolderBase]: For 2807903/2807903 co-relation queries the response was YES. [2024-06-27 20:28:53,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82325 conditions, 7148 events. 4372/7148 cut-off events. For 2807903/2807903 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46575 event pairs, 915 based on Foata normal form. 2/7150 useless extension candidates. Maximal degree in co-relation 82118. Up to 6589 conditions per place. [2024-06-27 20:28:53,452 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 538 selfloop transitions, 20 changer transitions 0/584 dead transitions. [2024-06-27 20:28:53,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 584 transitions, 7792 flow [2024-06-27 20:28:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:28:53,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-27 20:28:53,453 INFO L175 Difference]: Start difference. First operand has 432 places, 563 transitions, 6536 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:28:53,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 584 transitions, 7792 flow [2024-06-27 20:29:02,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 584 transitions, 7668 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:02,936 INFO L231 Difference]: Finished difference. Result has 436 places, 566 transitions, 6560 flow [2024-06-27 20:29:02,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6412, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6560, PETRI_PLACES=436, PETRI_TRANSITIONS=566} [2024-06-27 20:29:02,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-27 20:29:02,937 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 566 transitions, 6560 flow [2024-06-27 20:29:02,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:02,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:02,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:02,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:29:02,938 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:02,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1847967429, now seen corresponding path program 3 times [2024-06-27 20:29:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:02,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156581135] [2024-06-27 20:29:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:03,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:03,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156581135] [2024-06-27 20:29:03,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156581135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:03,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:03,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:03,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865604304] [2024-06-27 20:29:03,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:03,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:03,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:03,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 566 transitions, 6560 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:03,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:03,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:03,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:05,866 INFO L124 PetriNetUnfolderBase]: 4366/7140 cut-off events. [2024-06-27 20:29:05,866 INFO L125 PetriNetUnfolderBase]: For 2814030/2814030 co-relation queries the response was YES. [2024-06-27 20:29:05,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82289 conditions, 7140 events. 4366/7140 cut-off events. For 2814030/2814030 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 46479 event pairs, 912 based on Foata normal form. 2/7142 useless extension candidates. Maximal degree in co-relation 82080. Up to 6541 conditions per place. [2024-06-27 20:29:05,999 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 529 selfloop transitions, 32 changer transitions 0/587 dead transitions. [2024-06-27 20:29:05,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 587 transitions, 7744 flow [2024-06-27 20:29:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:29:06,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:29:06,000 INFO L175 Difference]: Start difference. First operand has 436 places, 566 transitions, 6560 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:29:06,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 587 transitions, 7744 flow [2024-06-27 20:29:16,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 587 transitions, 7558 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:16,590 INFO L231 Difference]: Finished difference. Result has 438 places, 566 transitions, 6444 flow [2024-06-27 20:29:16,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6444, PETRI_PLACES=438, PETRI_TRANSITIONS=566} [2024-06-27 20:29:16,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-27 20:29:16,591 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 566 transitions, 6444 flow [2024-06-27 20:29:16,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:16,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:16,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:16,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:29:16,592 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)] === [2024-06-27 20:29:16,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1884796253, now seen corresponding path program 2 times [2024-06-27 20:29:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261700857] [2024-06-27 20:29:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:17,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:17,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261700857] [2024-06-27 20:29:17,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261700857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:17,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:17,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:17,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854500210] [2024-06-27 20:29:17,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:17,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:17,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:17,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 566 transitions, 6444 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:19,787 INFO L124 PetriNetUnfolderBase]: 4387/7171 cut-off events. [2024-06-27 20:29:19,787 INFO L125 PetriNetUnfolderBase]: For 2875088/2875088 co-relation queries the response was YES. [2024-06-27 20:29:19,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83128 conditions, 7171 events. 4387/7171 cut-off events. For 2875088/2875088 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46707 event pairs, 914 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 82918. Up to 6577 conditions per place. [2024-06-27 20:29:19,983 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 519 selfloop transitions, 43 changer transitions 0/588 dead transitions. [2024-06-27 20:29:19,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 588 transitions, 8124 flow [2024-06-27 20:29:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:29:19,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:29:19,985 INFO L175 Difference]: Start difference. First operand has 438 places, 566 transitions, 6444 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:29:19,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 588 transitions, 8124 flow [2024-06-27 20:29:29,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 588 transitions, 8038 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:29:29,642 INFO L231 Difference]: Finished difference. Result has 439 places, 572 transitions, 6661 flow [2024-06-27 20:29:29,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6661, PETRI_PLACES=439, PETRI_TRANSITIONS=572} [2024-06-27 20:29:29,643 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-27 20:29:29,643 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 572 transitions, 6661 flow [2024-06-27 20:29:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:29,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:29,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:29,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:29:29,644 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)] === [2024-06-27 20:29:29,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1884787635, now seen corresponding path program 4 times [2024-06-27 20:29:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594887153] [2024-06-27 20:29:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:30,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594887153] [2024-06-27 20:29:30,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594887153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:30,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:30,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646508423] [2024-06-27 20:29:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:30,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:30,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 572 transitions, 6661 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:30,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:30,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:30,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:32,972 INFO L124 PetriNetUnfolderBase]: 4418/7214 cut-off events. [2024-06-27 20:29:32,973 INFO L125 PetriNetUnfolderBase]: For 2942785/2942785 co-relation queries the response was YES. [2024-06-27 20:29:33,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84549 conditions, 7214 events. 4418/7214 cut-off events. For 2942785/2942785 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 46948 event pairs, 910 based on Foata normal form. 2/7216 useless extension candidates. Maximal degree in co-relation 84338. Up to 6568 conditions per place. [2024-06-27 20:29:33,104 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 519 selfloop transitions, 52 changer transitions 0/597 dead transitions. [2024-06-27 20:29:33,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 597 transitions, 8379 flow [2024-06-27 20:29:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:29:33,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:29:33,106 INFO L175 Difference]: Start difference. First operand has 439 places, 572 transitions, 6661 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:29:33,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 597 transitions, 8379 flow [2024-06-27 20:29:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 597 transitions, 8229 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:42,406 INFO L231 Difference]: Finished difference. Result has 443 places, 578 transitions, 6831 flow [2024-06-27 20:29:42,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6511, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6831, PETRI_PLACES=443, PETRI_TRANSITIONS=578} [2024-06-27 20:29:42,407 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-27 20:29:42,407 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 578 transitions, 6831 flow [2024-06-27 20:29:42,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:42,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:42,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:42,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:29:42,408 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)] === [2024-06-27 20:29:42,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1884550485, now seen corresponding path program 5 times [2024-06-27 20:29:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205727497] [2024-06-27 20:29:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:43,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:43,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205727497] [2024-06-27 20:29:43,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205727497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:43,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:43,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:43,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491795087] [2024-06-27 20:29:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:43,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:43,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 578 transitions, 6831 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:43,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:43,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:43,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:45,608 INFO L124 PetriNetUnfolderBase]: 4428/7232 cut-off events. [2024-06-27 20:29:45,608 INFO L125 PetriNetUnfolderBase]: For 2984063/2984063 co-relation queries the response was YES. [2024-06-27 20:29:45,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85436 conditions, 7232 events. 4428/7232 cut-off events. For 2984063/2984063 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 47129 event pairs, 915 based on Foata normal form. 2/7234 useless extension candidates. Maximal degree in co-relation 85223. Up to 6578 conditions per place. [2024-06-27 20:29:45,734 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 521 selfloop transitions, 53 changer transitions 0/600 dead transitions. [2024-06-27 20:29:45,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 600 transitions, 8461 flow [2024-06-27 20:29:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:29:45,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:29:45,735 INFO L175 Difference]: Start difference. First operand has 443 places, 578 transitions, 6831 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:29:45,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 600 transitions, 8461 flow [2024-06-27 20:29:55,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 600 transitions, 8315 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:55,074 INFO L231 Difference]: Finished difference. Result has 447 places, 581 transitions, 6905 flow [2024-06-27 20:29:55,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6905, PETRI_PLACES=447, PETRI_TRANSITIONS=581} [2024-06-27 20:29:55,075 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-27 20:29:55,075 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 581 transitions, 6905 flow [2024-06-27 20:29:55,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:55,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:55,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:29:55,076 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)] === [2024-06-27 20:29:55,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash 271415043, now seen corresponding path program 6 times [2024-06-27 20:29:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:55,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891138252] [2024-06-27 20:29:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:55,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:55,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891138252] [2024-06-27 20:29:55,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891138252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:55,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:55,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:55,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073699494] [2024-06-27 20:29:55,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:55,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:55,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:55,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 581 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:55,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:55,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:55,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:58,370 INFO L124 PetriNetUnfolderBase]: 4422/7222 cut-off events. [2024-06-27 20:29:58,370 INFO L125 PetriNetUnfolderBase]: For 2987467/2987467 co-relation queries the response was YES. [2024-06-27 20:29:58,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84705 conditions, 7222 events. 4422/7222 cut-off events. For 2987467/2987467 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 46994 event pairs, 914 based on Foata normal form. 2/7224 useless extension candidates. Maximal degree in co-relation 84490. Up to 6573 conditions per place. [2024-06-27 20:29:58,496 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 522 selfloop transitions, 52 changer transitions 0/600 dead transitions. [2024-06-27 20:29:58,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 600 transitions, 8113 flow [2024-06-27 20:29:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:29:58,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-27 20:29:58,497 INFO L175 Difference]: Start difference. First operand has 447 places, 581 transitions, 6905 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:29:58,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 600 transitions, 8113 flow [2024-06-27 20:30:07,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 600 transitions, 7815 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:07,131 INFO L231 Difference]: Finished difference. Result has 449 places, 581 transitions, 6717 flow [2024-06-27 20:30:07,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6607, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6717, PETRI_PLACES=449, PETRI_TRANSITIONS=581} [2024-06-27 20:30:07,131 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-27 20:30:07,131 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 581 transitions, 6717 flow [2024-06-27 20:30:07,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:07,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:07,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:30:07,132 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)] === [2024-06-27 20:30:07,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1884557243, now seen corresponding path program 3 times [2024-06-27 20:30:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:07,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890436257] [2024-06-27 20:30:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:07,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890436257] [2024-06-27 20:30:07,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890436257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:07,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:07,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:07,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721814950] [2024-06-27 20:30:07,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:07,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:07,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:08,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:30:08,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 581 transitions, 6717 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:08,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:08,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:30:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:10,309 INFO L124 PetriNetUnfolderBase]: 4427/7231 cut-off events. [2024-06-27 20:30:10,309 INFO L125 PetriNetUnfolderBase]: For 3020306/3020306 co-relation queries the response was YES. [2024-06-27 20:30:10,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84642 conditions, 7231 events. 4427/7231 cut-off events. For 3020306/3020306 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47136 event pairs, 916 based on Foata normal form. 2/7233 useless extension candidates. Maximal degree in co-relation 84427. Up to 6629 conditions per place. [2024-06-27 20:30:10,456 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 531 selfloop transitions, 43 changer transitions 0/600 dead transitions. [2024-06-27 20:30:10,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 600 transitions, 8315 flow [2024-06-27 20:30:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:30:10,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-27 20:30:10,458 INFO L175 Difference]: Start difference. First operand has 449 places, 581 transitions, 6717 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:30:10,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 600 transitions, 8315 flow [2024-06-27 20:30:20,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 600 transitions, 8175 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:30:20,307 INFO L231 Difference]: Finished difference. Result has 449 places, 584 transitions, 6759 flow [2024-06-27 20:30:20,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6577, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6759, PETRI_PLACES=449, PETRI_TRANSITIONS=584} [2024-06-27 20:30:20,308 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-27 20:30:20,308 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 584 transitions, 6759 flow [2024-06-27 20:30:20,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:20,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:20,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:20,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:30:20,309 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)] === [2024-06-27 20:30:20,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:20,309 INFO L85 PathProgramCache]: Analyzing trace with hash 271645931, now seen corresponding path program 4 times [2024-06-27 20:30:20,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:20,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527529533] [2024-06-27 20:30:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:20,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:21,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527529533] [2024-06-27 20:30:21,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527529533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:21,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:21,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:21,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876759028] [2024-06-27 20:30:21,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:21,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:21,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:30:21,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 584 transitions, 6759 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:21,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:21,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:30:21,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:23,656 INFO L124 PetriNetUnfolderBase]: 4416/7218 cut-off events. [2024-06-27 20:30:23,657 INFO L125 PetriNetUnfolderBase]: For 3030376/3030376 co-relation queries the response was YES. [2024-06-27 20:30:23,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84363 conditions, 7218 events. 4416/7218 cut-off events. For 3030376/3030376 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47089 event pairs, 915 based on Foata normal form. 2/7220 useless extension candidates. Maximal degree in co-relation 84147. Up to 6620 conditions per place. [2024-06-27 20:30:23,780 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 529 selfloop transitions, 44 changer transitions 0/599 dead transitions. [2024-06-27 20:30:23,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 599 transitions, 7941 flow [2024-06-27 20:30:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:30:23,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:30:23,781 INFO L175 Difference]: Start difference. First operand has 449 places, 584 transitions, 6759 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:30:23,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 599 transitions, 7941 flow [2024-06-27 20:30:33,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 599 transitions, 7718 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:33,587 INFO L231 Difference]: Finished difference. Result has 452 places, 584 transitions, 6630 flow [2024-06-27 20:30:33,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6630, PETRI_PLACES=452, PETRI_TRANSITIONS=584} [2024-06-27 20:30:33,587 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-27 20:30:33,587 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 584 transitions, 6630 flow [2024-06-27 20:30:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:33,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:33,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:30:33,588 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)] === [2024-06-27 20:30:33,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1511269725, now seen corresponding path program 5 times [2024-06-27 20:30:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:33,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570802288] [2024-06-27 20:30:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:34,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:34,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570802288] [2024-06-27 20:30:34,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570802288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:34,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:34,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:34,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297846602] [2024-06-27 20:30:34,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:34,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:34,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:34,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:34,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:30:34,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 584 transitions, 6630 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:34,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:34,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:30:34,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:36,893 INFO L124 PetriNetUnfolderBase]: 4426/7234 cut-off events. [2024-06-27 20:30:36,893 INFO L125 PetriNetUnfolderBase]: For 3066038/3066040 co-relation queries the response was YES. [2024-06-27 20:30:36,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84601 conditions, 7234 events. 4426/7234 cut-off events. For 3066038/3066040 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47151 event pairs, 924 based on Foata normal form. 4/7238 useless extension candidates. Maximal degree in co-relation 84384. Up to 6566 conditions per place. [2024-06-27 20:30:37,028 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 490 selfloop transitions, 87 changer transitions 0/603 dead transitions. [2024-06-27 20:30:37,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 603 transitions, 8356 flow [2024-06-27 20:30:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:30:37,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-27 20:30:37,029 INFO L175 Difference]: Start difference. First operand has 452 places, 584 transitions, 6630 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:30:37,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 603 transitions, 8356 flow [2024-06-27 20:30:47,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 603 transitions, 8239 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:30:47,457 INFO L231 Difference]: Finished difference. Result has 452 places, 590 transitions, 6916 flow [2024-06-27 20:30:47,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6916, PETRI_PLACES=452, PETRI_TRANSITIONS=590} [2024-06-27 20:30:47,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-27 20:30:47,457 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 590 transitions, 6916 flow [2024-06-27 20:30:47,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:47,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:47,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:47,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:30:47,458 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)] === [2024-06-27 20:30:47,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1501142025, now seen corresponding path program 6 times [2024-06-27 20:30:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:47,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006698141] [2024-06-27 20:30:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:48,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:48,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006698141] [2024-06-27 20:30:48,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006698141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:48,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:48,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776087210] [2024-06-27 20:30:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:48,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:48,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:30:48,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 590 transitions, 6916 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:48,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:48,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:30:48,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:50,782 INFO L124 PetriNetUnfolderBase]: 4452/7270 cut-off events. [2024-06-27 20:30:50,783 INFO L125 PetriNetUnfolderBase]: For 3136533/3136535 co-relation queries the response was YES. [2024-06-27 20:30:50,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86091 conditions, 7270 events. 4452/7270 cut-off events. For 3136533/3136535 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47364 event pairs, 923 based on Foata normal form. 4/7274 useless extension candidates. Maximal degree in co-relation 85873. Up to 6591 conditions per place. [2024-06-27 20:30:50,912 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 496 selfloop transitions, 88 changer transitions 0/610 dead transitions. [2024-06-27 20:30:50,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 610 transitions, 9000 flow [2024-06-27 20:30:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:30:50,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 20:30:50,914 INFO L175 Difference]: Start difference. First operand has 452 places, 590 transitions, 6916 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:30:50,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 610 transitions, 9000 flow [2024-06-27 20:31:02,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 610 transitions, 8777 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:02,163 INFO L231 Difference]: Finished difference. Result has 456 places, 596 transitions, 7103 flow [2024-06-27 20:31:02,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7103, PETRI_PLACES=456, PETRI_TRANSITIONS=596} [2024-06-27 20:31:02,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 411 predicate places. [2024-06-27 20:31:02,177 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 596 transitions, 7103 flow [2024-06-27 20:31:02,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:02,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:02,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:02,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:31:02,177 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)] === [2024-06-27 20:31:02,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1501141777, now seen corresponding path program 7 times [2024-06-27 20:31:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:02,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262426625] [2024-06-27 20:31:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:03,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:03,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262426625] [2024-06-27 20:31:03,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262426625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:03,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:03,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:03,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590491498] [2024-06-27 20:31:03,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:03,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:03,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:03,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:31:03,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 596 transitions, 7103 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:03,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:03,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:31:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:05,384 INFO L124 PetriNetUnfolderBase]: 4465/7294 cut-off events. [2024-06-27 20:31:05,384 INFO L125 PetriNetUnfolderBase]: For 3183288/3183290 co-relation queries the response was YES. [2024-06-27 20:31:05,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86404 conditions, 7294 events. 4465/7294 cut-off events. For 3183288/3183290 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 47584 event pairs, 923 based on Foata normal form. 2/7296 useless extension candidates. Maximal degree in co-relation 86184. Up to 6577 conditions per place. [2024-06-27 20:31:05,648 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 510 selfloop transitions, 82 changer transitions 0/618 dead transitions. [2024-06-27 20:31:05,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 618 transitions, 8869 flow [2024-06-27 20:31:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:31:05,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:31:05,650 INFO L175 Difference]: Start difference. First operand has 456 places, 596 transitions, 7103 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:31:05,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 618 transitions, 8869 flow [2024-06-27 20:31:16,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 618 transitions, 8659 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:16,432 INFO L231 Difference]: Finished difference. Result has 460 places, 602 transitions, 7273 flow [2024-06-27 20:31:16,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6893, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7273, PETRI_PLACES=460, PETRI_TRANSITIONS=602} [2024-06-27 20:31:16,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 415 predicate places. [2024-06-27 20:31:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 602 transitions, 7273 flow [2024-06-27 20:31:16,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:16,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:16,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:31:16,433 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)] === [2024-06-27 20:31:16,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1501150395, now seen corresponding path program 7 times [2024-06-27 20:31:16,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:16,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226576846] [2024-06-27 20:31:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226576846] [2024-06-27 20:31:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226576846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:17,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:17,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681965957] [2024-06-27 20:31:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:17,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:17,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:31:17,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 602 transitions, 7273 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:17,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:17,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:31:17,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15