./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_pso.oepc_pso.opt_tso.oepc_tso.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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_pso.oepc_pso.opt_tso.oepc_tso.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:57:52,109 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:57:52,198 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:57:52,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:57:52,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:57:52,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:57:52,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:57:52,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:57:52,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:57:52,241 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:57:52,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:57:52,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:57:52,242 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:57:52,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:57:52,244 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:57:52,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:57:52,244 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:57:52,244 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:57:52,245 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:57:52,245 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:57:52,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:57:52,246 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:57:52,246 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:57:52,246 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:57:52,247 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:57:52,247 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:57:52,247 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:57:52,247 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:57:52,248 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:57:52,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:57:52,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:57:52,249 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:57:52,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:57:52,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:57:52,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:57:52,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:57:52,251 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:57:52,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:57:52,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:57:52,251 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:57:52,251 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:57:52,252 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:57:52,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:57:52,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:57:52,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:57:52,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:57:52,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:57:52,515 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:57:52,516 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:57:52,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 00:57:52,732 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:57:52,733 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:57:52,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:57:53,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:57:54,205 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:57:54,209 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:57:54,233 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9608e5b23/80fdaaf663b64e908d098a0797f100ba/FLAG3cbe04241 [2024-06-28 00:57:54,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9608e5b23/80fdaaf663b64e908d098a0797f100ba [2024-06-28 00:57:54,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:57:54,247 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:57:54,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:57:54,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:57:54,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:57:54,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:57:52" (1/2) ... [2024-06-28 00:57:54,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f1506 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:57:54, skipping insertion in model container [2024-06-28 00:57:54,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:57:52" (1/2) ... [2024-06-28 00:57:54,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8c9f96f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:57:54, skipping insertion in model container [2024-06-28 00:57:54,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:57:54" (2/2) ... [2024-06-28 00:57:54,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f1506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54, skipping insertion in model container [2024-06-28 00:57:54,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:57:54" (2/2) ... [2024-06-28 00:57:54,259 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:57:54,318 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:57:54,319 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 00:57:54,319 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 00:57:54,320 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 00:57:54,320 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] ((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 00:57:54,320 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:57:54,320 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-28 00:57:54,366 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:57:54,530 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-28 00:57:54,651 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:57:54,660 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:57:54,701 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:57:54,784 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:57:54,822 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:57:54,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54 WrapperNode [2024-06-28 00:57:54,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:57:54,827 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:57:54,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:57:54,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:57:54,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,845 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,871 INFO L138 Inliner]: procedures = 176, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-06-28 00:57:54,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:57:54,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:57:54,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:57:54,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:57:54,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,904 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]. [2024-06-28 00:57:54,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,904 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,912 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,919 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,920 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,923 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:57:54,924 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:57:54,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:57:54,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:57:54,925 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (1/1) ... [2024-06-28 00:57:54,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:57:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:57:54,950 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) [2024-06-28 00:57:54,969 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 [2024-06-28 00:57:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:57:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:57:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:57:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:57:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:57:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:57:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:57:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:57:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 00:57:55,009 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 00:57:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:57:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:57:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:57:55,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:57:55,011 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:57:55,122 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:57:55,124 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:57:55,379 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:57:55,380 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:57:55,448 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:57:55,449 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:57:55,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:57:55 BoogieIcfgContainer [2024-06-28 00:57:55,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:57:55,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:57:55,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:57:55,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:57:55,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:57:52" (1/4) ... [2024-06-28 00:57:55,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0ff8b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:57:55, skipping insertion in model container [2024-06-28 00:57:55,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:57:54" (2/4) ... [2024-06-28 00:57:55,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0ff8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:57:55, skipping insertion in model container [2024-06-28 00:57:55,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:57:54" (3/4) ... [2024-06-28 00:57:55,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0ff8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:57:55, skipping insertion in model container [2024-06-28 00:57:55,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:57:55" (4/4) ... [2024-06-28 00:57:55,459 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:57:55,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:57:55,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-28 00:57:55,476 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:57:55,535 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:57:55,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 54 transitions, 124 flow [2024-06-28 00:57:55,610 INFO L124 PetriNetUnfolderBase]: 1/50 cut-off events. [2024-06-28 00:57:55,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:57:55,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 1/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-06-28 00:57:55,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 54 transitions, 124 flow [2024-06-28 00:57:55,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 47 transitions, 106 flow [2024-06-28 00:57:55,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:57:55,640 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;@3ba65b18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:57:55,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-28 00:57:55,645 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:57:55,645 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 00:57:55,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:57:55,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:55,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:57:55,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:57:55,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash 220070101, now seen corresponding path program 1 times [2024-06-28 00:57:55,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704719352] [2024-06-28 00:57:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:55,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704719352] [2024-06-28 00:57:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704719352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:56,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:56,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:57:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645605394] [2024-06-28 00:57:56,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:56,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:57:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:57:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:57:56,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 54 [2024-06-28 00:57:56,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:57:56,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:56,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 54 [2024-06-28 00:57:56,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:56,766 INFO L124 PetriNetUnfolderBase]: 3091/4806 cut-off events. [2024-06-28 00:57:56,766 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-06-28 00:57:56,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9240 conditions, 4806 events. 3091/4806 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30076 event pairs, 2323 based on Foata normal form. 1/4667 useless extension candidates. Maximal degree in co-relation 9227. Up to 4287 conditions per place. [2024-06-28 00:57:56,806 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 40 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-06-28 00:57:56,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 237 flow [2024-06-28 00:57:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:57:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:57:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-06-28 00:57:56,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2024-06-28 00:57:56,820 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 106 flow. Second operand 3 states and 118 transitions. [2024-06-28 00:57:56,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 237 flow [2024-06-28 00:57:56,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:57:56,831 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 141 flow [2024-06-28 00:57:56,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-28 00:57:56,838 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-06-28 00:57:56,839 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 141 flow [2024-06-28 00:57:56,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:57:56,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:56,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:56,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:57:56,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:57:56,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:56,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2080785477, now seen corresponding path program 1 times [2024-06-28 00:57:56,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:56,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449580614] [2024-06-28 00:57:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:56,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:57,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:57,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449580614] [2024-06-28 00:57:57,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449580614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:57,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:57,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:57:57,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862480620] [2024-06-28 00:57:57,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:57:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:57:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:57:57,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:57:57,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:57:57,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:57,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:57:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:57,993 INFO L124 PetriNetUnfolderBase]: 5391/8375 cut-off events. [2024-06-28 00:57:57,999 INFO L125 PetriNetUnfolderBase]: For 1502/1516 co-relation queries the response was YES. [2024-06-28 00:57:58,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18215 conditions, 8375 events. 5391/8375 cut-off events. For 1502/1516 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 53188 event pairs, 3278 based on Foata normal form. 15/8251 useless extension candidates. Maximal degree in co-relation 18203. Up to 7279 conditions per place. [2024-06-28 00:57:58,062 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 53 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-28 00:57:58,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 329 flow [2024-06-28 00:57:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:57:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:57:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-06-28 00:57:58,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6898148148148148 [2024-06-28 00:57:58,069 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 141 flow. Second operand 4 states and 149 transitions. [2024-06-28 00:57:58,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 329 flow [2024-06-28 00:57:58,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:57:58,073 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 176 flow [2024-06-28 00:57:58,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-06-28 00:57:58,075 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-06-28 00:57:58,077 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 176 flow [2024-06-28 00:57:58,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:57:58,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:58,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:57:58,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:57:58,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -253216549, now seen corresponding path program 1 times [2024-06-28 00:57:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020880475] [2024-06-28 00:57:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:58,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020880475] [2024-06-28 00:57:58,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020880475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:58,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:58,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:57:58,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964353711] [2024-06-28 00:57:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:57:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:57:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:57:58,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:57:58,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:57:58,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:58,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:57:58,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:57:59,071 INFO L124 PetriNetUnfolderBase]: 5334/8107 cut-off events. [2024-06-28 00:57:59,071 INFO L125 PetriNetUnfolderBase]: For 3601/3601 co-relation queries the response was YES. [2024-06-28 00:57:59,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19474 conditions, 8107 events. 5334/8107 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50124 event pairs, 3030 based on Foata normal form. 3/8054 useless extension candidates. Maximal degree in co-relation 19460. Up to 7276 conditions per place. [2024-06-28 00:57:59,129 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 57 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-06-28 00:57:59,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 388 flow [2024-06-28 00:57:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:57:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:57:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-06-28 00:57:59,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-06-28 00:57:59,131 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 176 flow. Second operand 4 states and 146 transitions. [2024-06-28 00:57:59,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 388 flow [2024-06-28 00:57:59,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 366 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:57:59,135 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 228 flow [2024-06-28 00:57:59,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-28 00:57:59,136 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-06-28 00:57:59,136 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 228 flow [2024-06-28 00:57:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:57:59,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:57:59,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:57:59,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:57:59,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:57:59,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:57:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1472062714, now seen corresponding path program 1 times [2024-06-28 00:57:59,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:57:59,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064265741] [2024-06-28 00:57:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:57:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:57:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:57:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:57:59,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:57:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064265741] [2024-06-28 00:57:59,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064265741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:57:59,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:57:59,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:57:59,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111081070] [2024-06-28 00:57:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:57:59,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:57:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:57:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:57:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:57:59,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:57:59,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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) [2024-06-28 00:57:59,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:57:59,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:57:59,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:00,047 INFO L124 PetriNetUnfolderBase]: 5319/7760 cut-off events. [2024-06-28 00:58:00,048 INFO L125 PetriNetUnfolderBase]: For 6018/6018 co-relation queries the response was YES. [2024-06-28 00:58:00,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21107 conditions, 7760 events. 5319/7760 cut-off events. For 6018/6018 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 46339 event pairs, 2358 based on Foata normal form. 6/7753 useless extension candidates. Maximal degree in co-relation 21091. Up to 7217 conditions per place. [2024-06-28 00:58:00,108 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 67 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-06-28 00:58:00,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 478 flow [2024-06-28 00:58:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-28 00:58:00,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:00,110 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 228 flow. Second operand 5 states and 180 transitions. [2024-06-28 00:58:00,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 478 flow [2024-06-28 00:58:00,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 474 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:00,116 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 280 flow [2024-06-28 00:58:00,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-28 00:58:00,117 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2024-06-28 00:58:00,117 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 280 flow [2024-06-28 00:58:00,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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) [2024-06-28 00:58:00,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:00,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:00,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:58:00,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:00,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash 694469408, now seen corresponding path program 1 times [2024-06-28 00:58:00,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:00,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339673479] [2024-06-28 00:58:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:00,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:00,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339673479] [2024-06-28 00:58:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339673479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:00,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:00,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:00,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029259235] [2024-06-28 00:58:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:00,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:00,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:00,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:00,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:00,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:00,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:01,301 INFO L124 PetriNetUnfolderBase]: 6856/9978 cut-off events. [2024-06-28 00:58:01,301 INFO L125 PetriNetUnfolderBase]: For 11714/11725 co-relation queries the response was YES. [2024-06-28 00:58:01,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28800 conditions, 9978 events. 6856/9978 cut-off events. For 11714/11725 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 60097 event pairs, 2516 based on Foata normal form. 15/9963 useless extension candidates. Maximal degree in co-relation 28781. Up to 9111 conditions per place. [2024-06-28 00:58:01,516 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 63 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-28 00:58:01,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 544 flow [2024-06-28 00:58:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-06-28 00:58:01,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6898148148148148 [2024-06-28 00:58:01,520 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 280 flow. Second operand 4 states and 149 transitions. [2024-06-28 00:58:01,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 544 flow [2024-06-28 00:58:01,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 514 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:01,532 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 350 flow [2024-06-28 00:58:01,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-28 00:58:01,533 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-06-28 00:58:01,533 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 350 flow [2024-06-28 00:58:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:01,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:01,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:58:01,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash 707995328, now seen corresponding path program 2 times [2024-06-28 00:58:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914418314] [2024-06-28 00:58:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:01,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914418314] [2024-06-28 00:58:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914418314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:01,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:01,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:01,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676958855] [2024-06-28 00:58:01,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:01,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:01,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:01,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:01,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:01,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:01,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:01,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:02,742 INFO L124 PetriNetUnfolderBase]: 6847/10399 cut-off events. [2024-06-28 00:58:02,743 INFO L125 PetriNetUnfolderBase]: For 18696/18698 co-relation queries the response was YES. [2024-06-28 00:58:02,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32587 conditions, 10399 events. 6847/10399 cut-off events. For 18696/18698 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 65761 event pairs, 3457 based on Foata normal form. 3/10324 useless extension candidates. Maximal degree in co-relation 32567. Up to 9179 conditions per place. [2024-06-28 00:58:02,817 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 78 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-28 00:58:02,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 716 flow [2024-06-28 00:58:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-28 00:58:02,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:02,819 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 350 flow. Second operand 5 states and 180 transitions. [2024-06-28 00:58:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 716 flow [2024-06-28 00:58:02,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 648 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:02,849 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 463 flow [2024-06-28 00:58:02,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-28 00:58:02,850 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2024-06-28 00:58:02,851 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 463 flow [2024-06-28 00:58:02,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:02,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:02,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:02,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:58:02,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash 667674738, now seen corresponding path program 1 times [2024-06-28 00:58:02,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:02,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37960270] [2024-06-28 00:58:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37960270] [2024-06-28 00:58:03,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37960270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:03,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:03,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289472040] [2024-06-28 00:58:03,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:03,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:03,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:03,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:03,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 463 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:03,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:03,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:03,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:04,062 INFO L124 PetriNetUnfolderBase]: 6580/9702 cut-off events. [2024-06-28 00:58:04,062 INFO L125 PetriNetUnfolderBase]: For 18465/18468 co-relation queries the response was YES. [2024-06-28 00:58:04,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31580 conditions, 9702 events. 6580/9702 cut-off events. For 18465/18468 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 59463 event pairs, 2639 based on Foata normal form. 5/9686 useless extension candidates. Maximal degree in co-relation 31557. Up to 8753 conditions per place. [2024-06-28 00:58:04,130 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 83 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-28 00:58:04,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 117 transitions, 821 flow [2024-06-28 00:58:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-06-28 00:58:04,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-28 00:58:04,132 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 463 flow. Second operand 4 states and 147 transitions. [2024-06-28 00:58:04,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 117 transitions, 821 flow [2024-06-28 00:58:04,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 785 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:04,151 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 568 flow [2024-06-28 00:58:04,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=568, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-06-28 00:58:04,152 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-06-28 00:58:04,152 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 568 flow [2024-06-28 00:58:04,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:04,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:04,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:04,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:58:04,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:04,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -469255393, now seen corresponding path program 1 times [2024-06-28 00:58:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296061861] [2024-06-28 00:58:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:04,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:04,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296061861] [2024-06-28 00:58:04,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296061861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:04,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:04,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:04,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588016058] [2024-06-28 00:58:04,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:04,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:04,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:04,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:04,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 568 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:04,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:04,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:04,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:05,452 INFO L124 PetriNetUnfolderBase]: 7672/11765 cut-off events. [2024-06-28 00:58:05,452 INFO L125 PetriNetUnfolderBase]: For 35367/35375 co-relation queries the response was YES. [2024-06-28 00:58:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42147 conditions, 11765 events. 7672/11765 cut-off events. For 35367/35375 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75651 event pairs, 2418 based on Foata normal form. 34/11681 useless extension candidates. Maximal degree in co-relation 42120. Up to 9344 conditions per place. [2024-06-28 00:58:05,546 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 103 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-28 00:58:05,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 157 transitions, 1125 flow [2024-06-28 00:58:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 226 transitions. [2024-06-28 00:58:05,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2024-06-28 00:58:05,548 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 568 flow. Second operand 6 states and 226 transitions. [2024-06-28 00:58:05,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 157 transitions, 1125 flow [2024-06-28 00:58:05,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 157 transitions, 1111 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:05,581 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 761 flow [2024-06-28 00:58:05,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-06-28 00:58:05,582 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-06-28 00:58:05,582 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 761 flow [2024-06-28 00:58:05,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:05,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:05,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:05,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:58:05,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:05,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1772086379, now seen corresponding path program 2 times [2024-06-28 00:58:05,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:05,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323293256] [2024-06-28 00:58:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:05,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323293256] [2024-06-28 00:58:05,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323293256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:05,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:05,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:05,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610043894] [2024-06-28 00:58:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:05,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:05,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:05,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 761 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:05,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:05,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:05,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:06,953 INFO L124 PetriNetUnfolderBase]: 7550/10991 cut-off events. [2024-06-28 00:58:06,954 INFO L125 PetriNetUnfolderBase]: For 43056/43064 co-relation queries the response was YES. [2024-06-28 00:58:06,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43982 conditions, 10991 events. 7550/10991 cut-off events. For 43056/43064 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 66623 event pairs, 2187 based on Foata normal form. 52/11017 useless extension candidates. Maximal degree in co-relation 43951. Up to 9599 conditions per place. [2024-06-28 00:58:07,060 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 95 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-28 00:58:07,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1145 flow [2024-06-28 00:58:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-06-28 00:58:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-28 00:58:07,062 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 761 flow. Second operand 5 states and 187 transitions. [2024-06-28 00:58:07,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1145 flow [2024-06-28 00:58:07,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 143 transitions, 1080 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:07,178 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 795 flow [2024-06-28 00:58:07,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=795, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-28 00:58:07,179 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 30 predicate places. [2024-06-28 00:58:07,179 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 795 flow [2024-06-28 00:58:07,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:07,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:07,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:07,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:58:07,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:07,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:07,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1778702911, now seen corresponding path program 3 times [2024-06-28 00:58:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:07,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762815278] [2024-06-28 00:58:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762815278] [2024-06-28 00:58:07,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762815278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:07,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:07,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:07,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833838276] [2024-06-28 00:58:07,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:07,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:07,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:07,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 795 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:07,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:07,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:07,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:08,369 INFO L124 PetriNetUnfolderBase]: 7665/11139 cut-off events. [2024-06-28 00:58:08,369 INFO L125 PetriNetUnfolderBase]: For 45078/45080 co-relation queries the response was YES. [2024-06-28 00:58:08,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45207 conditions, 11139 events. 7665/11139 cut-off events. For 45078/45080 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 67497 event pairs, 2551 based on Foata normal form. 24/11142 useless extension candidates. Maximal degree in co-relation 45174. Up to 10142 conditions per place. [2024-06-28 00:58:08,447 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 114 selfloop transitions, 23 changer transitions 0/152 dead transitions. [2024-06-28 00:58:08,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 152 transitions, 1220 flow [2024-06-28 00:58:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-06-28 00:58:08,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6635802469135802 [2024-06-28 00:58:08,597 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 795 flow. Second operand 6 states and 215 transitions. [2024-06-28 00:58:08,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 152 transitions, 1220 flow [2024-06-28 00:58:08,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1162 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:08,669 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 825 flow [2024-06-28 00:58:08,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=825, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-28 00:58:08,670 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2024-06-28 00:58:08,670 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 825 flow [2024-06-28 00:58:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:08,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:08,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:08,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:58:08,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671299, now seen corresponding path program 1 times [2024-06-28 00:58:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191594] [2024-06-28 00:58:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:08,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191594] [2024-06-28 00:58:08,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:08,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:08,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294453633] [2024-06-28 00:58:08,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:08,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:08,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 825 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:08,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:08,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:08,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:09,773 INFO L124 PetriNetUnfolderBase]: 7626/11340 cut-off events. [2024-06-28 00:58:09,773 INFO L125 PetriNetUnfolderBase]: For 52767/52769 co-relation queries the response was YES. [2024-06-28 00:58:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45983 conditions, 11340 events. 7626/11340 cut-off events. For 52767/52769 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 70662 event pairs, 2941 based on Foata normal form. 18/11279 useless extension candidates. Maximal degree in co-relation 45949. Up to 9653 conditions per place. [2024-06-28 00:58:09,845 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 114 selfloop transitions, 29 changer transitions 0/158 dead transitions. [2024-06-28 00:58:09,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 1279 flow [2024-06-28 00:58:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-06-28 00:58:09,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6697530864197531 [2024-06-28 00:58:09,846 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 825 flow. Second operand 6 states and 217 transitions. [2024-06-28 00:58:09,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 1279 flow [2024-06-28 00:58:09,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 158 transitions, 1221 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:58:09,916 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 879 flow [2024-06-28 00:58:09,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=879, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-28 00:58:09,917 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 35 predicate places. [2024-06-28 00:58:09,917 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 879 flow [2024-06-28 00:58:09,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:09,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:09,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:09,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:58:09,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:09,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -991755044, now seen corresponding path program 1 times [2024-06-28 00:58:09,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:09,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625399381] [2024-06-28 00:58:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:09,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:10,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:10,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625399381] [2024-06-28 00:58:10,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625399381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:10,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313324555] [2024-06-28 00:58:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:10,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:10,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:10,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 879 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:10,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:10,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:10,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:11,257 INFO L124 PetriNetUnfolderBase]: 7245/10656 cut-off events. [2024-06-28 00:58:11,257 INFO L125 PetriNetUnfolderBase]: For 57869/57886 co-relation queries the response was YES. [2024-06-28 00:58:11,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45463 conditions, 10656 events. 7245/10656 cut-off events. For 57869/57886 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 65910 event pairs, 2465 based on Foata normal form. 8/10654 useless extension candidates. Maximal degree in co-relation 45427. Up to 9739 conditions per place. [2024-06-28 00:58:11,342 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 106 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-28 00:58:11,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 147 transitions, 1307 flow [2024-06-28 00:58:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-28 00:58:11,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:58:11,346 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 879 flow. Second operand 5 states and 177 transitions. [2024-06-28 00:58:11,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 147 transitions, 1307 flow [2024-06-28 00:58:11,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1244 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:11,437 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1018 flow [2024-06-28 00:58:11,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1018, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-06-28 00:58:11,438 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 39 predicate places. [2024-06-28 00:58:11,438 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1018 flow [2024-06-28 00:58:11,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:11,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:11,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:58:11,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:11,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1806543527, now seen corresponding path program 1 times [2024-06-28 00:58:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:11,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199679799] [2024-06-28 00:58:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:11,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:11,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199679799] [2024-06-28 00:58:11,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199679799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:11,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:11,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:11,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45244959] [2024-06-28 00:58:11,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:11,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:11,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1018 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:11,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:11,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:11,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:12,578 INFO L124 PetriNetUnfolderBase]: 7472/11032 cut-off events. [2024-06-28 00:58:12,578 INFO L125 PetriNetUnfolderBase]: For 63871/63880 co-relation queries the response was YES. [2024-06-28 00:58:12,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47866 conditions, 11032 events. 7472/11032 cut-off events. For 63871/63880 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 68670 event pairs, 2484 based on Foata normal form. 12/11012 useless extension candidates. Maximal degree in co-relation 47827. Up to 9800 conditions per place. [2024-06-28 00:58:12,651 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 95 selfloop transitions, 36 changer transitions 0/154 dead transitions. [2024-06-28 00:58:12,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 154 transitions, 1459 flow [2024-06-28 00:58:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-28 00:58:12,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-28 00:58:12,653 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1018 flow. Second operand 5 states and 177 transitions. [2024-06-28 00:58:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 154 transitions, 1459 flow [2024-06-28 00:58:12,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1413 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:12,758 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1182 flow [2024-06-28 00:58:12,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1182, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-28 00:58:12,759 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2024-06-28 00:58:12,759 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1182 flow [2024-06-28 00:58:12,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:12,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:12,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:12,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:58:12,760 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:12,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1806157577, now seen corresponding path program 2 times [2024-06-28 00:58:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:12,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420719723] [2024-06-28 00:58:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:12,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:12,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420719723] [2024-06-28 00:58:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420719723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:12,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:12,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715498340] [2024-06-28 00:58:12,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:12,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:12,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1182 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:12,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:12,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:12,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:13,948 INFO L124 PetriNetUnfolderBase]: 7505/11324 cut-off events. [2024-06-28 00:58:13,949 INFO L125 PetriNetUnfolderBase]: For 80419/80479 co-relation queries the response was YES. [2024-06-28 00:58:13,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51872 conditions, 11324 events. 7505/11324 cut-off events. For 80419/80479 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 72438 event pairs, 3339 based on Foata normal form. 62/11294 useless extension candidates. Maximal degree in co-relation 51829. Up to 9764 conditions per place. [2024-06-28 00:58:14,041 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 104 selfloop transitions, 45 changer transitions 0/172 dead transitions. [2024-06-28 00:58:14,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1742 flow [2024-06-28 00:58:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-06-28 00:58:14,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 00:58:14,043 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1182 flow. Second operand 5 states and 181 transitions. [2024-06-28 00:58:14,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1742 flow [2024-06-28 00:58:14,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1692 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:14,386 INFO L231 Difference]: Finished difference. Result has 110 places, 145 transitions, 1413 flow [2024-06-28 00:58:14,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1413, PETRI_PLACES=110, PETRI_TRANSITIONS=145} [2024-06-28 00:58:14,387 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-06-28 00:58:14,387 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 145 transitions, 1413 flow [2024-06-28 00:58:14,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:14,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:14,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:58:14,388 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:14,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1036114949, now seen corresponding path program 1 times [2024-06-28 00:58:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:14,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448852262] [2024-06-28 00:58:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:14,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448852262] [2024-06-28 00:58:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448852262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:14,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:14,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184303309] [2024-06-28 00:58:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:14,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:14,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 145 transitions, 1413 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:58:14,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:14,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:14,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:15,906 INFO L124 PetriNetUnfolderBase]: 7950/11667 cut-off events. [2024-06-28 00:58:15,906 INFO L125 PetriNetUnfolderBase]: For 90963/90963 co-relation queries the response was YES. [2024-06-28 00:58:15,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57856 conditions, 11667 events. 7950/11667 cut-off events. For 90963/90963 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 71548 event pairs, 2482 based on Foata normal form. 3/11656 useless extension candidates. Maximal degree in co-relation 57810. Up to 10603 conditions per place. [2024-06-28 00:58:15,993 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 165 selfloop transitions, 32 changer transitions 0/212 dead transitions. [2024-06-28 00:58:15,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2323 flow [2024-06-28 00:58:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-06-28 00:58:15,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-28 00:58:15,994 INFO L175 Difference]: Start difference. First operand has 110 places, 145 transitions, 1413 flow. Second operand 6 states and 214 transitions. [2024-06-28 00:58:15,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2323 flow [2024-06-28 00:58:16,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 212 transitions, 2253 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-28 00:58:16,114 INFO L231 Difference]: Finished difference. Result has 118 places, 165 transitions, 1669 flow [2024-06-28 00:58:16,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1669, PETRI_PLACES=118, PETRI_TRANSITIONS=165} [2024-06-28 00:58:16,115 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 58 predicate places. [2024-06-28 00:58:16,115 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 165 transitions, 1669 flow [2024-06-28 00:58:16,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:58:16,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:16,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:58:16,116 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:16,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1806151625, now seen corresponding path program 2 times [2024-06-28 00:58:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721648755] [2024-06-28 00:58:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721648755] [2024-06-28 00:58:16,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721648755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:16,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:16,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:16,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514465362] [2024-06-28 00:58:16,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:16,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:16,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 165 transitions, 1669 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:58:16,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:16,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:16,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:17,499 INFO L124 PetriNetUnfolderBase]: 8011/11822 cut-off events. [2024-06-28 00:58:17,499 INFO L125 PetriNetUnfolderBase]: For 99119/99131 co-relation queries the response was YES. [2024-06-28 00:58:17,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59483 conditions, 11822 events. 8011/11822 cut-off events. For 99119/99131 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 73251 event pairs, 3293 based on Foata normal form. 11/11807 useless extension candidates. Maximal degree in co-relation 59432. Up to 10719 conditions per place. [2024-06-28 00:58:17,611 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 176 selfloop transitions, 35 changer transitions 0/226 dead transitions. [2024-06-28 00:58:17,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 226 transitions, 2523 flow [2024-06-28 00:58:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:58:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:58:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 244 transitions. [2024-06-28 00:58:17,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455026455026455 [2024-06-28 00:58:17,613 INFO L175 Difference]: Start difference. First operand has 118 places, 165 transitions, 1669 flow. Second operand 7 states and 244 transitions. [2024-06-28 00:58:17,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 226 transitions, 2523 flow [2024-06-28 00:58:17,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 226 transitions, 2429 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:17,787 INFO L231 Difference]: Finished difference. Result has 125 places, 177 transitions, 1824 flow [2024-06-28 00:58:17,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1824, PETRI_PLACES=125, PETRI_TRANSITIONS=177} [2024-06-28 00:58:17,788 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-06-28 00:58:17,788 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 177 transitions, 1824 flow [2024-06-28 00:58:17,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:58:17,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:17,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:17,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:58:17,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:17,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1806359015, now seen corresponding path program 3 times [2024-06-28 00:58:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865444807] [2024-06-28 00:58:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:17,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:17,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865444807] [2024-06-28 00:58:17,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865444807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:17,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:17,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055795786] [2024-06-28 00:58:17,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:17,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:17,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:17,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:17,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 177 transitions, 1824 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:58:17,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:17,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:17,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:19,400 INFO L124 PetriNetUnfolderBase]: 8003/11769 cut-off events. [2024-06-28 00:58:19,400 INFO L125 PetriNetUnfolderBase]: For 109921/109921 co-relation queries the response was YES. [2024-06-28 00:58:19,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60693 conditions, 11769 events. 8003/11769 cut-off events. For 109921/109921 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 72380 event pairs, 2546 based on Foata normal form. 3/11754 useless extension candidates. Maximal degree in co-relation 60639. Up to 10713 conditions per place. [2024-06-28 00:58:19,504 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 166 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-28 00:58:19,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2422 flow [2024-06-28 00:58:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-28 00:58:19,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:19,506 INFO L175 Difference]: Start difference. First operand has 125 places, 177 transitions, 1824 flow. Second operand 5 states and 180 transitions. [2024-06-28 00:58:19,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2422 flow [2024-06-28 00:58:19,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2320 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:19,734 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 1795 flow [2024-06-28 00:58:19,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1795, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-28 00:58:19,734 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-06-28 00:58:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 1795 flow [2024-06-28 00:58:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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) [2024-06-28 00:58:19,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:19,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:19,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:58:19,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:19,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1806143689, now seen corresponding path program 1 times [2024-06-28 00:58:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:19,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460761054] [2024-06-28 00:58:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:19,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460761054] [2024-06-28 00:58:19,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460761054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:19,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:19,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:19,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487943978] [2024-06-28 00:58:19,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:19,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:19,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:19,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:19,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:19,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:19,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:19,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:21,381 INFO L124 PetriNetUnfolderBase]: 7741/11710 cut-off events. [2024-06-28 00:58:21,382 INFO L125 PetriNetUnfolderBase]: For 113952/113981 co-relation queries the response was YES. [2024-06-28 00:58:21,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59382 conditions, 11710 events. 7741/11710 cut-off events. For 113952/113981 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 75268 event pairs, 3324 based on Foata normal form. 18/11634 useless extension candidates. Maximal degree in co-relation 59326. Up to 10208 conditions per place. [2024-06-28 00:58:21,492 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 172 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2024-06-28 00:58:21,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2383 flow [2024-06-28 00:58:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-28 00:58:21,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:58:21,493 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 1795 flow. Second operand 5 states and 180 transitions. [2024-06-28 00:58:21,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2383 flow [2024-06-28 00:58:21,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2321 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:58:21,712 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 1828 flow [2024-06-28 00:58:21,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1828, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-28 00:58:21,713 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2024-06-28 00:58:21,713 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 1828 flow [2024-06-28 00:58:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:21,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:21,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:21,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:58:21,713 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:21,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1847895330, now seen corresponding path program 1 times [2024-06-28 00:58:21,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:21,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947732101] [2024-06-28 00:58:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:21,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947732101] [2024-06-28 00:58:21,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947732101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:21,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:21,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:58:21,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131283144] [2024-06-28 00:58:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:21,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:58:21,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:58:21,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:58:21,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-28 00:58:21,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 1828 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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) [2024-06-28 00:58:21,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:21,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-28 00:58:21,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:22,977 INFO L124 PetriNetUnfolderBase]: 7290/10818 cut-off events. [2024-06-28 00:58:22,977 INFO L125 PetriNetUnfolderBase]: For 129506/129755 co-relation queries the response was YES. [2024-06-28 00:58:23,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58165 conditions, 10818 events. 7290/10818 cut-off events. For 129506/129755 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 68475 event pairs, 2291 based on Foata normal form. 25/10619 useless extension candidates. Maximal degree in co-relation 58108. Up to 9546 conditions per place. [2024-06-28 00:58:23,089 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 144 selfloop transitions, 16 changer transitions 0/197 dead transitions. [2024-06-28 00:58:23,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 197 transitions, 2212 flow [2024-06-28 00:58:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:58:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:58:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-06-28 00:58:23,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-28 00:58:23,090 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 1828 flow. Second operand 4 states and 143 transitions. [2024-06-28 00:58:23,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 197 transitions, 2212 flow [2024-06-28 00:58:23,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 197 transitions, 2158 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:23,359 INFO L231 Difference]: Finished difference. Result has 131 places, 182 transitions, 1860 flow [2024-06-28 00:58:23,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1860, PETRI_PLACES=131, PETRI_TRANSITIONS=182} [2024-06-28 00:58:23,359 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 71 predicate places. [2024-06-28 00:58:23,360 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 182 transitions, 1860 flow [2024-06-28 00:58:23,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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) [2024-06-28 00:58:23,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:23,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:23,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:58:23,360 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:23,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 403343739, now seen corresponding path program 1 times [2024-06-28 00:58:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958388345] [2024-06-28 00:58:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958388345] [2024-06-28 00:58:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958388345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:23,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:23,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850215425] [2024-06-28 00:58:23,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:23,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:23,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:23,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:23,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 182 transitions, 1860 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:23,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:23,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:23,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:24,912 INFO L124 PetriNetUnfolderBase]: 7886/11619 cut-off events. [2024-06-28 00:58:24,913 INFO L125 PetriNetUnfolderBase]: For 135126/135186 co-relation queries the response was YES. [2024-06-28 00:58:24,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62098 conditions, 11619 events. 7886/11619 cut-off events. For 135126/135186 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 72270 event pairs, 2749 based on Foata normal form. 39/11611 useless extension candidates. Maximal degree in co-relation 62038. Up to 10098 conditions per place. [2024-06-28 00:58:25,010 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 164 selfloop transitions, 41 changer transitions 0/230 dead transitions. [2024-06-28 00:58:25,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 230 transitions, 2580 flow [2024-06-28 00:58:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-06-28 00:58:25,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-28 00:58:25,012 INFO L175 Difference]: Start difference. First operand has 131 places, 182 transitions, 1860 flow. Second operand 6 states and 214 transitions. [2024-06-28 00:58:25,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 230 transitions, 2580 flow [2024-06-28 00:58:25,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 230 transitions, 2562 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 00:58:25,267 INFO L231 Difference]: Finished difference. Result has 137 places, 190 transitions, 2105 flow [2024-06-28 00:58:25,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2105, PETRI_PLACES=137, PETRI_TRANSITIONS=190} [2024-06-28 00:58:25,268 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 77 predicate places. [2024-06-28 00:58:25,268 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 190 transitions, 2105 flow [2024-06-28 00:58:25,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:25,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:25,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:25,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:58:25,268 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:25,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2054795301, now seen corresponding path program 2 times [2024-06-28 00:58:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:25,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047495516] [2024-06-28 00:58:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:25,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:25,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:25,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047495516] [2024-06-28 00:58:25,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047495516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:25,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:25,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:58:25,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917486608] [2024-06-28 00:58:25,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:25,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:58:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:58:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:58:25,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:25,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 190 transitions, 2105 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:25,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:25,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:25,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:26,890 INFO L124 PetriNetUnfolderBase]: 7854/11560 cut-off events. [2024-06-28 00:58:26,891 INFO L125 PetriNetUnfolderBase]: For 150138/150152 co-relation queries the response was YES. [2024-06-28 00:58:26,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63969 conditions, 11560 events. 7854/11560 cut-off events. For 150138/150152 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 71933 event pairs, 2488 based on Foata normal form. 17/11564 useless extension candidates. Maximal degree in co-relation 63906. Up to 10276 conditions per place. [2024-06-28 00:58:27,025 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 165 selfloop transitions, 34 changer transitions 0/224 dead transitions. [2024-06-28 00:58:27,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 224 transitions, 2585 flow [2024-06-28 00:58:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-28 00:58:27,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-28 00:58:27,026 INFO L175 Difference]: Start difference. First operand has 137 places, 190 transitions, 2105 flow. Second operand 6 states and 208 transitions. [2024-06-28 00:58:27,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 224 transitions, 2585 flow [2024-06-28 00:58:27,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 224 transitions, 2419 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:27,459 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 2016 flow [2024-06-28 00:58:27,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2016, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-28 00:58:27,460 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2024-06-28 00:58:27,460 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 2016 flow [2024-06-28 00:58:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:27,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:27,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:27,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:58:27,460 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:27,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2051155509, now seen corresponding path program 1 times [2024-06-28 00:58:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:27,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642556749] [2024-06-28 00:58:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642556749] [2024-06-28 00:58:27,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642556749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:27,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:27,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835876136] [2024-06-28 00:58:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:27,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:27,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:27,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:27,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 2016 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:27,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:27,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:27,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:29,077 INFO L124 PetriNetUnfolderBase]: 8145/11857 cut-off events. [2024-06-28 00:58:29,077 INFO L125 PetriNetUnfolderBase]: For 152752/152763 co-relation queries the response was YES. [2024-06-28 00:58:29,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65028 conditions, 11857 events. 8145/11857 cut-off events. For 152752/152763 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 72398 event pairs, 2386 based on Foata normal form. 8/11847 useless extension candidates. Maximal degree in co-relation 64964. Up to 10821 conditions per place. [2024-06-28 00:58:29,524 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 160 selfloop transitions, 48 changer transitions 0/223 dead transitions. [2024-06-28 00:58:29,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 2582 flow [2024-06-28 00:58:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-06-28 00:58:29,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 00:58:29,530 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 2016 flow. Second operand 5 states and 179 transitions. [2024-06-28 00:58:29,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 2582 flow [2024-06-28 00:58:29,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 223 transitions, 2509 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:58:29,805 INFO L231 Difference]: Finished difference. Result has 141 places, 194 transitions, 2136 flow [2024-06-28 00:58:29,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2136, PETRI_PLACES=141, PETRI_TRANSITIONS=194} [2024-06-28 00:58:29,806 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 81 predicate places. [2024-06-28 00:58:29,806 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 194 transitions, 2136 flow [2024-06-28 00:58:29,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:29,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:29,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:29,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:58:29,807 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:29,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1008472451, now seen corresponding path program 2 times [2024-06-28 00:58:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:29,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486336341] [2024-06-28 00:58:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486336341] [2024-06-28 00:58:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486336341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:29,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243239568] [2024-06-28 00:58:29,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:29,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:29,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:29,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:29,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 194 transitions, 2136 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:29,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:29,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:29,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:31,472 INFO L124 PetriNetUnfolderBase]: 8169/12029 cut-off events. [2024-06-28 00:58:31,472 INFO L125 PetriNetUnfolderBase]: For 173004/173015 co-relation queries the response was YES. [2024-06-28 00:58:31,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67682 conditions, 12029 events. 8169/12029 cut-off events. For 173004/173015 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 74917 event pairs, 2864 based on Foata normal form. 8/11986 useless extension candidates. Maximal degree in co-relation 67617. Up to 10798 conditions per place. [2024-06-28 00:58:31,587 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 170 selfloop transitions, 57 changer transitions 0/242 dead transitions. [2024-06-28 00:58:31,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2932 flow [2024-06-28 00:58:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-28 00:58:31,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-28 00:58:31,588 INFO L175 Difference]: Start difference. First operand has 141 places, 194 transitions, 2136 flow. Second operand 6 states and 213 transitions. [2024-06-28 00:58:31,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2932 flow [2024-06-28 00:58:31,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 2799 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:31,928 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2294 flow [2024-06-28 00:58:31,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2294, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-28 00:58:31,929 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 84 predicate places. [2024-06-28 00:58:31,929 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2294 flow [2024-06-28 00:58:31,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:31,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:31,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:58:31,930 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:31,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1008741221, now seen corresponding path program 3 times [2024-06-28 00:58:31,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:31,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560282815] [2024-06-28 00:58:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:31,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:32,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:32,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560282815] [2024-06-28 00:58:32,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560282815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:32,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:32,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572654154] [2024-06-28 00:58:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:32,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:32,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:32,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2294 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:32,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:32,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:33,615 INFO L124 PetriNetUnfolderBase]: 8193/12005 cut-off events. [2024-06-28 00:58:33,615 INFO L125 PetriNetUnfolderBase]: For 192065/192076 co-relation queries the response was YES. [2024-06-28 00:58:33,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70061 conditions, 12005 events. 8193/12005 cut-off events. For 192065/192076 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 74179 event pairs, 2386 based on Foata normal form. 8/11995 useless extension candidates. Maximal degree in co-relation 69995. Up to 10823 conditions per place. [2024-06-28 00:58:33,754 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 166 selfloop transitions, 62 changer transitions 0/243 dead transitions. [2024-06-28 00:58:33,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 243 transitions, 3016 flow [2024-06-28 00:58:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-06-28 00:58:33,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512345679012346 [2024-06-28 00:58:33,755 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2294 flow. Second operand 6 states and 211 transitions. [2024-06-28 00:58:33,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 243 transitions, 3016 flow [2024-06-28 00:58:34,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 243 transitions, 2853 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:34,197 INFO L231 Difference]: Finished difference. Result has 148 places, 206 transitions, 2352 flow [2024-06-28 00:58:34,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2352, PETRI_PLACES=148, PETRI_TRANSITIONS=206} [2024-06-28 00:58:34,198 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2024-06-28 00:58:34,198 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 206 transitions, 2352 flow [2024-06-28 00:58:34,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:34,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:34,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:34,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:58:34,199 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:34,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1008741562, now seen corresponding path program 1 times [2024-06-28 00:58:34,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:34,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935684082] [2024-06-28 00:58:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935684082] [2024-06-28 00:58:34,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935684082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:34,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048329314] [2024-06-28 00:58:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:34,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:34,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:34,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 206 transitions, 2352 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:34,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:34,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:34,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:36,146 INFO L124 PetriNetUnfolderBase]: 8361/12437 cut-off events. [2024-06-28 00:58:36,146 INFO L125 PetriNetUnfolderBase]: For 202702/202718 co-relation queries the response was YES. [2024-06-28 00:58:36,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72353 conditions, 12437 events. 8361/12437 cut-off events. For 202702/202718 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 78246 event pairs, 2543 based on Foata normal form. 15/12434 useless extension candidates. Maximal degree in co-relation 72285. Up to 10855 conditions per place. [2024-06-28 00:58:36,263 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 188 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-28 00:58:36,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 287 transitions, 3595 flow [2024-06-28 00:58:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:58:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:58:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 309 transitions. [2024-06-28 00:58:36,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-28 00:58:36,265 INFO L175 Difference]: Start difference. First operand has 148 places, 206 transitions, 2352 flow. Second operand 9 states and 309 transitions. [2024-06-28 00:58:36,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 287 transitions, 3595 flow [2024-06-28 00:58:36,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 287 transitions, 3456 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:36,720 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2780 flow [2024-06-28 00:58:36,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2780, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-28 00:58:36,720 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 97 predicate places. [2024-06-28 00:58:36,721 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2780 flow [2024-06-28 00:58:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:36,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:58:36,721 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash -97428346, now seen corresponding path program 2 times [2024-06-28 00:58:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387481633] [2024-06-28 00:58:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:36,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:36,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387481633] [2024-06-28 00:58:36,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387481633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:36,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:36,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:36,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968514066] [2024-06-28 00:58:36,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:36,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:36,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2780 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:36,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:36,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:36,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:38,573 INFO L124 PetriNetUnfolderBase]: 8675/12826 cut-off events. [2024-06-28 00:58:38,573 INFO L125 PetriNetUnfolderBase]: For 238048/238059 co-relation queries the response was YES. [2024-06-28 00:58:38,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80101 conditions, 12826 events. 8675/12826 cut-off events. For 238048/238059 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 80292 event pairs, 2453 based on Foata normal form. 12/12818 useless extension candidates. Maximal degree in co-relation 80029. Up to 11140 conditions per place. [2024-06-28 00:58:38,709 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 189 selfloop transitions, 92 changer transitions 0/296 dead transitions. [2024-06-28 00:58:38,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 296 transitions, 4086 flow [2024-06-28 00:58:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-06-28 00:58:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-06-28 00:58:38,710 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2780 flow. Second operand 6 states and 220 transitions. [2024-06-28 00:58:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 296 transitions, 4086 flow [2024-06-28 00:58:39,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 296 transitions, 3915 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-28 00:58:39,329 INFO L231 Difference]: Finished difference. Result has 162 places, 256 transitions, 3336 flow [2024-06-28 00:58:39,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3336, PETRI_PLACES=162, PETRI_TRANSITIONS=256} [2024-06-28 00:58:39,330 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 102 predicate places. [2024-06-28 00:58:39,330 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 256 transitions, 3336 flow [2024-06-28 00:58:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:39,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:39,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:58:39,330 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1814136101, now seen corresponding path program 4 times [2024-06-28 00:58:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299627864] [2024-06-28 00:58:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:39,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:39,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299627864] [2024-06-28 00:58:39,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299627864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:39,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:39,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337365622] [2024-06-28 00:58:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:39,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:39,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:39,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:39,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:39,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 256 transitions, 3336 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:39,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:39,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:39,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:41,566 INFO L124 PetriNetUnfolderBase]: 8668/12700 cut-off events. [2024-06-28 00:58:41,567 INFO L125 PetriNetUnfolderBase]: For 269007/269018 co-relation queries the response was YES. [2024-06-28 00:58:41,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84117 conditions, 12700 events. 8668/12700 cut-off events. For 269007/269018 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 78964 event pairs, 2372 based on Foata normal form. 8/12690 useless extension candidates. Maximal degree in co-relation 84041. Up to 11473 conditions per place. [2024-06-28 00:58:41,689 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 219 selfloop transitions, 52 changer transitions 0/286 dead transitions. [2024-06-28 00:58:41,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 286 transitions, 3952 flow [2024-06-28 00:58:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:58:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:58:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-06-28 00:58:41,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 00:58:41,690 INFO L175 Difference]: Start difference. First operand has 162 places, 256 transitions, 3336 flow. Second operand 5 states and 181 transitions. [2024-06-28 00:58:41,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 286 transitions, 3952 flow [2024-06-28 00:58:42,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 286 transitions, 3746 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-28 00:58:42,565 INFO L231 Difference]: Finished difference. Result has 164 places, 256 transitions, 3250 flow [2024-06-28 00:58:42,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3250, PETRI_PLACES=164, PETRI_TRANSITIONS=256} [2024-06-28 00:58:42,565 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-06-28 00:58:42,566 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 256 transitions, 3250 flow [2024-06-28 00:58:42,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:42,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:42,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:42,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:58:42,566 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:42,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash -117776746, now seen corresponding path program 3 times [2024-06-28 00:58:42,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:42,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44347960] [2024-06-28 00:58:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:42,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:42,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:42,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44347960] [2024-06-28 00:58:42,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44347960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:42,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:42,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:42,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701766334] [2024-06-28 00:58:42,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:42,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:42,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:42,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-28 00:58:42,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 256 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:42,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:42,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-28 00:58:42,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:44,479 INFO L124 PetriNetUnfolderBase]: 8690/12854 cut-off events. [2024-06-28 00:58:44,480 INFO L125 PetriNetUnfolderBase]: For 263558/263569 co-relation queries the response was YES. [2024-06-28 00:58:44,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83685 conditions, 12854 events. 8690/12854 cut-off events. For 263558/263569 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 80747 event pairs, 2433 based on Foata normal form. 12/12840 useless extension candidates. Maximal degree in co-relation 83608. Up to 11159 conditions per place. [2024-06-28 00:58:44,621 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 192 selfloop transitions, 106 changer transitions 0/313 dead transitions. [2024-06-28 00:58:44,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 313 transitions, 4261 flow [2024-06-28 00:58:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:58:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:58:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-06-28 00:58:44,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-06-28 00:58:44,623 INFO L175 Difference]: Start difference. First operand has 164 places, 256 transitions, 3250 flow. Second operand 8 states and 281 transitions. [2024-06-28 00:58:44,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 313 transitions, 4261 flow [2024-06-28 00:58:45,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 313 transitions, 4098 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:58:45,593 INFO L231 Difference]: Finished difference. Result has 167 places, 265 transitions, 3478 flow [2024-06-28 00:58:45,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=167, PETRI_TRANSITIONS=265} [2024-06-28 00:58:45,594 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-06-28 00:58:45,594 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 265 transitions, 3478 flow [2024-06-28 00:58:45,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:45,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:45,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:45,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:58:45,596 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:45,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -117768810, now seen corresponding path program 1 times [2024-06-28 00:58:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:45,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412508370] [2024-06-28 00:58:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:45,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412508370] [2024-06-28 00:58:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412508370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:45,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:45,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:58:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582725447] [2024-06-28 00:58:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:58:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:58:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:58:45,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-28 00:58:45,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 265 transitions, 3478 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:45,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:45,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-28 00:58:45,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:58:47,720 INFO L124 PetriNetUnfolderBase]: 8989/13485 cut-off events. [2024-06-28 00:58:47,721 INFO L125 PetriNetUnfolderBase]: For 289710/289856 co-relation queries the response was YES. [2024-06-28 00:58:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86646 conditions, 13485 events. 8989/13485 cut-off events. For 289710/289856 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 87555 event pairs, 3294 based on Foata normal form. 130/13515 useless extension candidates. Maximal degree in co-relation 86568. Up to 10911 conditions per place. [2024-06-28 00:58:47,889 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 219 selfloop transitions, 49 changer transitions 0/302 dead transitions. [2024-06-28 00:58:47,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 302 transitions, 4248 flow [2024-06-28 00:58:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:58:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:58:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-28 00:58:47,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-28 00:58:47,890 INFO L175 Difference]: Start difference. First operand has 167 places, 265 transitions, 3478 flow. Second operand 6 states and 213 transitions. [2024-06-28 00:58:47,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 302 transitions, 4248 flow [2024-06-28 00:58:48,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 302 transitions, 3958 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 00:58:48,648 INFO L231 Difference]: Finished difference. Result has 166 places, 267 transitions, 3360 flow [2024-06-28 00:58:48,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3360, PETRI_PLACES=166, PETRI_TRANSITIONS=267} [2024-06-28 00:58:48,649 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 106 predicate places. [2024-06-28 00:58:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 267 transitions, 3360 flow [2024-06-28 00:58:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:48,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:58:48,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:58:48,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:58:48,650 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 00:58:48,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:58:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash -760215777, now seen corresponding path program 1 times [2024-06-28 00:58:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:58:48,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605975624] [2024-06-28 00:58:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:58:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:58:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:58:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:58:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:58:48,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605975624] [2024-06-28 00:58:48,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605975624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:58:48,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:58:48,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:58:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163351070] [2024-06-28 00:58:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:58:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:58:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:58:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:58:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:58:48,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-28 00:58:48,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 267 transitions, 3360 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:58:48,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:58:48,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-28 00:58:48,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand