./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix042.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/mix042.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix042.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 [2024-06-27 18:33:30,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:33:31,028 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:33:31,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:33:31,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:33:31,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:33:31,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:33:31,064 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:33:31,065 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:33:31,066 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:33:31,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:33:31,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:33:31,067 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:33:31,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:33:31,068 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:33:31,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:33:31,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:33:31,069 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:33:31,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:33:31,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:33:31,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:33:31,070 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:33:31,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:33:31,071 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:33:31,072 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:33:31,073 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:33:31,073 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:33:31,073 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:33:31,073 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:33:31,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:33:31,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:33:31,074 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:33:31,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:33:31,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:33:31,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:33:31,074 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:33:31,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:33:31,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:33:31,075 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:33:31,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:33:31,075 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:33:31,075 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:33:31,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:33:31,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:33:31,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:33:31,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:33:31,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:33:31,371 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:33:31,372 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:33:31,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix042.opt.yml/witness.yml [2024-06-27 18:33:31,596 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:33:31,597 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:33:31,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-27 18:33:32,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:33:33,095 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:33:33,098 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-27 18:33:33,114 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d0a7959/37cf97f1958f445cbaae059eeaceafc6/FLAG09716a7bf [2024-06-27 18:33:33,129 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d0a7959/37cf97f1958f445cbaae059eeaceafc6 [2024-06-27 18:33:33,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:33:33,130 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:33:33,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:33:33,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:33:33,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:33:33,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:33:31" (1/2) ... [2024-06-27 18:33:33,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19cb8f56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:33:33, skipping insertion in model container [2024-06-27 18:33:33,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:33:31" (1/2) ... [2024-06-27 18:33:33,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bcd054 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:33:33, skipping insertion in model container [2024-06-27 18:33:33,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:33:33" (2/2) ... [2024-06-27 18:33:33,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19cb8f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33, skipping insertion in model container [2024-06-27 18:33:33,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:33:33" (2/2) ... [2024-06-27 18:33:33,139 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:33:33,258 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:33:33,259 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-27 18:33:33,259 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-27 18:33:33,259 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-27 18:33:33,259 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:33:33,260 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-27 18:33:33,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:33:33,452 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/mix042.opt.i[944,957] [2024-06-27 18:33:33,631 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:33:33,649 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:33:33,689 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/mix042.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:33:33,822 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:33:33,857 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:33:33,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33 WrapperNode [2024-06-27 18:33:33,859 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:33:33,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:33:33,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:33:33,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:33:33,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:33,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:33,930 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2024-06-27 18:33:33,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:33:33,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:33:33,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:33:33,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:33:33,968 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:33,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:33,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,021 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 18:33:34,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,022 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,032 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:33:34,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:33:34,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:33:34,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:33:34,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (1/1) ... [2024-06-27 18:33:34,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:33:34,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:33:34,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:33:34,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:33:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:33:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:33:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:33:34,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:33:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:33:34,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:33:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:33:34,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:33:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:33:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:33:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:33:34,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:33:34,128 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:33:34,252 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:33:34,254 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:33:34,557 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:33:34,557 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:33:34,726 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:33:34,727 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:33:34,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:33:34 BoogieIcfgContainer [2024-06-27 18:33:34,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:33:34,731 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:33:34,731 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:33:34,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:33:34,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:33:31" (1/4) ... [2024-06-27 18:33:34,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7211713d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:33:34, skipping insertion in model container [2024-06-27 18:33:34,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:33:33" (2/4) ... [2024-06-27 18:33:34,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7211713d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:33:34, skipping insertion in model container [2024-06-27 18:33:34,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:33:33" (3/4) ... [2024-06-27 18:33:34,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7211713d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:33:34, skipping insertion in model container [2024-06-27 18:33:34,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:33:34" (4/4) ... [2024-06-27 18:33:34,739 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.opt.i [2024-06-27 18:33:34,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:33:34,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:33:34,757 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:33:34,814 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:33:34,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:33:34,916 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-27 18:33:34,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:33:34,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-27 18:33:34,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 18:33:34,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 99 flow [2024-06-27 18:33:34,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:33:34,950 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;@4fd1efc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:33:34,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:33:34,956 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:33:34,956 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 18:33:34,956 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:33:34,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:34,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:33:34,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 354130535, now seen corresponding path program 1 times [2024-06-27 18:33:34,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474768876] [2024-06-27 18:33:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:35,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474768876] [2024-06-27 18:33:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474768876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:35,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:35,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:33:35,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487187988] [2024-06-27 18:33:35,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:35,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:33:35,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:33:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:33:36,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-06-27 18:33:36,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:36,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:36,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-06-27 18:33:36,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:36,839 INFO L124 PetriNetUnfolderBase]: 3270/5350 cut-off events. [2024-06-27 18:33:36,840 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 18:33:36,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10137 conditions, 5350 events. 3270/5350 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34248 event pairs, 2609 based on Foata normal form. 169/5081 useless extension candidates. Maximal degree in co-relation 10125. Up to 4711 conditions per place. [2024-06-27 18:33:36,884 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 42 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-27 18:33:36,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 229 flow [2024-06-27 18:33:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:33:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:33:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-27 18:33:36,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-27 18:33:36,899 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 99 flow. Second operand 3 states and 100 transitions. [2024-06-27 18:33:36,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 229 flow [2024-06-27 18:33:36,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:33:36,909 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 131 flow [2024-06-27 18:33:36,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-27 18:33:36,914 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-06-27 18:33:36,914 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 131 flow [2024-06-27 18:33:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:36,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:36,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:36,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:33:36,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:36,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:36,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1017340530, now seen corresponding path program 1 times [2024-06-27 18:33:36,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:36,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012560497] [2024-06-27 18:33:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:36,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:37,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:37,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012560497] [2024-06-27 18:33:37,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012560497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:37,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:37,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:33:37,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466899754] [2024-06-27 18:33:37,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:33:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:37,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:33:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:33:37,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-06-27 18:33:37,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:37,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:37,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-06-27 18:33:37,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:38,292 INFO L124 PetriNetUnfolderBase]: 3735/5531 cut-off events. [2024-06-27 18:33:38,292 INFO L125 PetriNetUnfolderBase]: For 798/798 co-relation queries the response was YES. [2024-06-27 18:33:38,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12280 conditions, 5531 events. 3735/5531 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31690 event pairs, 1746 based on Foata normal form. 3/5294 useless extension candidates. Maximal degree in co-relation 12268. Up to 5340 conditions per place. [2024-06-27 18:33:38,332 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 55 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 18:33:38,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 329 flow [2024-06-27 18:33:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:33:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:33:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 18:33:38,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614583333333334 [2024-06-27 18:33:38,339 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 131 flow. Second operand 4 states and 127 transitions. [2024-06-27 18:33:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 329 flow [2024-06-27 18:33:38,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:33:38,342 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 177 flow [2024-06-27 18:33:38,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 18:33:38,343 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-27 18:33:38,344 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 177 flow [2024-06-27 18:33:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:38,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:38,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:33:38,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:38,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1991657401, now seen corresponding path program 1 times [2024-06-27 18:33:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:38,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269484978] [2024-06-27 18:33:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:39,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269484978] [2024-06-27 18:33:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269484978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:33:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918335474] [2024-06-27 18:33:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:33:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:33:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:33:39,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:33:39,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:39,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:39,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:33:39,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:40,179 INFO L124 PetriNetUnfolderBase]: 4757/7588 cut-off events. [2024-06-27 18:33:40,179 INFO L125 PetriNetUnfolderBase]: For 2800/2800 co-relation queries the response was YES. [2024-06-27 18:33:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17482 conditions, 7588 events. 4757/7588 cut-off events. For 2800/2800 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 48041 event pairs, 2460 based on Foata normal form. 6/7083 useless extension candidates. Maximal degree in co-relation 17468. Up to 6690 conditions per place. [2024-06-27 18:33:40,234 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 77 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2024-06-27 18:33:40,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 104 transitions, 504 flow [2024-06-27 18:33:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:33:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:33:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:33:40,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 18:33:40,240 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 177 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:33:40,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 104 transitions, 504 flow [2024-06-27 18:33:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 104 transitions, 476 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 18:33:40,246 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 237 flow [2024-06-27 18:33:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 18:33:40,248 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-27 18:33:40,248 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 237 flow [2024-06-27 18:33:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:40,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:40,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:33:40,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:40,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1954755794, now seen corresponding path program 1 times [2024-06-27 18:33:40,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196084578] [2024-06-27 18:33:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196084578] [2024-06-27 18:33:41,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196084578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:41,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:41,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:33:41,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959318012] [2024-06-27 18:33:41,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:41,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:33:41,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:33:41,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:33:41,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:33:41,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:41,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:41,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:33:41,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:42,204 INFO L124 PetriNetUnfolderBase]: 4672/7188 cut-off events. [2024-06-27 18:33:42,204 INFO L125 PetriNetUnfolderBase]: For 4487/4487 co-relation queries the response was YES. [2024-06-27 18:33:42,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18462 conditions, 7188 events. 4672/7188 cut-off events. For 4487/4487 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 43039 event pairs, 1621 based on Foata normal form. 2/6894 useless extension candidates. Maximal degree in co-relation 18445. Up to 6651 conditions per place. [2024-06-27 18:33:42,243 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 65 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 18:33:42,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 461 flow [2024-06-27 18:33:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:33:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:33:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 18:33:42,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-06-27 18:33:42,245 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 237 flow. Second operand 5 states and 131 transitions. [2024-06-27 18:33:42,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 461 flow [2024-06-27 18:33:42,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 423 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 18:33:42,255 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 258 flow [2024-06-27 18:33:42,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 18:33:42,257 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-06-27 18:33:42,257 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 258 flow [2024-06-27 18:33:42,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:42,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:42,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:42,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:33:42,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:42,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash 467889352, now seen corresponding path program 1 times [2024-06-27 18:33:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:42,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516104969] [2024-06-27 18:33:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:42,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:43,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516104969] [2024-06-27 18:33:43,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516104969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:43,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:43,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:33:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692145640] [2024-06-27 18:33:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:43,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:33:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:33:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:33:43,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:33:43,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:43,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:43,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:33:43,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:44,417 INFO L124 PetriNetUnfolderBase]: 4660/7570 cut-off events. [2024-06-27 18:33:44,417 INFO L125 PetriNetUnfolderBase]: For 6879/6879 co-relation queries the response was YES. [2024-06-27 18:33:44,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20008 conditions, 7570 events. 4660/7570 cut-off events. For 6879/6879 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 49195 event pairs, 2093 based on Foata normal form. 4/7063 useless extension candidates. Maximal degree in co-relation 19989. Up to 6614 conditions per place. [2024-06-27 18:33:44,482 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 75 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2024-06-27 18:33:44,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 596 flow [2024-06-27 18:33:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:33:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:33:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:33:44,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 18:33:44,485 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 258 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:33:44,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 596 flow [2024-06-27 18:33:44,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 102 transitions, 542 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 18:33:44,498 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 382 flow [2024-06-27 18:33:44,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2024-06-27 18:33:44,501 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 18:33:44,502 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 382 flow [2024-06-27 18:33:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:44,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:44,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:44,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:33:44,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:44,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash 466475901, now seen corresponding path program 1 times [2024-06-27 18:33:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870776186] [2024-06-27 18:33:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:44,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870776186] [2024-06-27 18:33:44,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870776186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:44,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:44,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:33:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873197285] [2024-06-27 18:33:44,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:44,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:33:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:33:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:33:44,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 48 [2024-06-27 18:33:44,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:44,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:44,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 48 [2024-06-27 18:33:44,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:44,986 INFO L124 PetriNetUnfolderBase]: 1102/2547 cut-off events. [2024-06-27 18:33:44,986 INFO L125 PetriNetUnfolderBase]: For 3986/4148 co-relation queries the response was YES. [2024-06-27 18:33:44,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6117 conditions, 2547 events. 1102/2547 cut-off events. For 3986/4148 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20752 event pairs, 290 based on Foata normal form. 11/2382 useless extension candidates. Maximal degree in co-relation 6096. Up to 1266 conditions per place. [2024-06-27 18:33:45,010 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 30 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 18:33:45,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 418 flow [2024-06-27 18:33:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:33:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:33:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-06-27 18:33:45,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-27 18:33:45,012 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 382 flow. Second operand 3 states and 108 transitions. [2024-06-27 18:33:45,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 418 flow [2024-06-27 18:33:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 18:33:45,017 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 324 flow [2024-06-27 18:33:45,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 18:33:45,020 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 18:33:45,020 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 324 flow [2024-06-27 18:33:45,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:45,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:45,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:45,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:33:45,021 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:45,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1982984083, now seen corresponding path program 1 times [2024-06-27 18:33:45,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:45,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856860892] [2024-06-27 18:33:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:45,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:45,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856860892] [2024-06-27 18:33:45,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856860892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:45,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:45,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:33:45,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517244072] [2024-06-27 18:33:45,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:45,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:33:45,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:33:45,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:33:45,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:45,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 324 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:45,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:45,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:45,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:47,001 INFO L124 PetriNetUnfolderBase]: 4755/7205 cut-off events. [2024-06-27 18:33:47,001 INFO L125 PetriNetUnfolderBase]: For 11681/11687 co-relation queries the response was YES. [2024-06-27 18:33:47,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20655 conditions, 7205 events. 4755/7205 cut-off events. For 11681/11687 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 42135 event pairs, 1619 based on Foata normal form. 8/7157 useless extension candidates. Maximal degree in co-relation 20632. Up to 6661 conditions per place. [2024-06-27 18:33:47,054 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 86 selfloop transitions, 29 changer transitions 5/129 dead transitions. [2024-06-27 18:33:47,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 129 transitions, 795 flow [2024-06-27 18:33:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:33:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:33:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:33:47,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 18:33:47,056 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 324 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:33:47,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 129 transitions, 795 flow [2024-06-27 18:33:47,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 767 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:33:47,064 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 484 flow [2024-06-27 18:33:47,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-27 18:33:47,066 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-27 18:33:47,066 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 484 flow [2024-06-27 18:33:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:47,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:47,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:33:47,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:47,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1613948081, now seen corresponding path program 2 times [2024-06-27 18:33:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:47,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671495384] [2024-06-27 18:33:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:47,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:47,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671495384] [2024-06-27 18:33:47,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671495384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:47,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:47,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:33:47,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588526055] [2024-06-27 18:33:47,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:47,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:33:47,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:33:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:33:47,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:47,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:47,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:47,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:47,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:48,909 INFO L124 PetriNetUnfolderBase]: 4271/6506 cut-off events. [2024-06-27 18:33:48,909 INFO L125 PetriNetUnfolderBase]: For 13460/13466 co-relation queries the response was YES. [2024-06-27 18:33:48,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20269 conditions, 6506 events. 4271/6506 cut-off events. For 13460/13466 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37722 event pairs, 1442 based on Foata normal form. 9/6458 useless extension candidates. Maximal degree in co-relation 20242. Up to 5978 conditions per place. [2024-06-27 18:33:48,967 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 81 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2024-06-27 18:33:48,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 900 flow [2024-06-27 18:33:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:33:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:33:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:33:48,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 18:33:48,969 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 484 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:33:48,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 900 flow [2024-06-27 18:33:48,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 123 transitions, 871 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 18:33:48,987 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 594 flow [2024-06-27 18:33:48,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2024-06-27 18:33:48,989 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-27 18:33:48,989 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 594 flow [2024-06-27 18:33:48,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:48,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:48,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:48,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:33:48,990 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:48,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1930828205, now seen corresponding path program 3 times [2024-06-27 18:33:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:48,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204684327] [2024-06-27 18:33:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:49,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204684327] [2024-06-27 18:33:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204684327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:49,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:49,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:33:49,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804449512] [2024-06-27 18:33:49,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:49,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:33:49,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:33:49,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:33:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:49,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:49,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:49,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:50,786 INFO L124 PetriNetUnfolderBase]: 4263/6495 cut-off events. [2024-06-27 18:33:50,786 INFO L125 PetriNetUnfolderBase]: For 14479/14484 co-relation queries the response was YES. [2024-06-27 18:33:50,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20339 conditions, 6495 events. 4263/6495 cut-off events. For 14479/14484 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37671 event pairs, 1442 based on Foata normal form. 7/6443 useless extension candidates. Maximal degree in co-relation 20310. Up to 5970 conditions per place. [2024-06-27 18:33:50,842 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 79 selfloop transitions, 33 changer transitions 0/121 dead transitions. [2024-06-27 18:33:50,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 926 flow [2024-06-27 18:33:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:33:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:33:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 18:33:50,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 18:33:50,844 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 594 flow. Second operand 6 states and 147 transitions. [2024-06-27 18:33:50,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 926 flow [2024-06-27 18:33:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 831 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 18:33:50,861 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 577 flow [2024-06-27 18:33:50,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-27 18:33:50,862 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2024-06-27 18:33:50,862 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 577 flow [2024-06-27 18:33:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:50,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:50,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:33:50,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:50,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1688058963, now seen corresponding path program 1 times [2024-06-27 18:33:50,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:50,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316925581] [2024-06-27 18:33:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:51,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:51,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316925581] [2024-06-27 18:33:51,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316925581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:51,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:51,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:33:51,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180186459] [2024-06-27 18:33:51,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:51,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:33:51,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:51,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:33:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:33:51,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:51,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:51,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:51,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:51,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:52,663 INFO L124 PetriNetUnfolderBase]: 4289/6538 cut-off events. [2024-06-27 18:33:52,663 INFO L125 PetriNetUnfolderBase]: For 14230/14230 co-relation queries the response was YES. [2024-06-27 18:33:52,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20378 conditions, 6538 events. 4289/6538 cut-off events. For 14230/14230 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37937 event pairs, 1384 based on Foata normal form. 2/6482 useless extension candidates. Maximal degree in co-relation 20349. Up to 6041 conditions per place. [2024-06-27 18:33:52,720 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 107 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-06-27 18:33:52,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 993 flow [2024-06-27 18:33:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:33:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:33:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:33:52,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:33:52,722 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 577 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:33:52,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 993 flow [2024-06-27 18:33:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 903 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:33:52,740 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 565 flow [2024-06-27 18:33:52,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=565, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-27 18:33:52,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-06-27 18:33:52,741 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 565 flow [2024-06-27 18:33:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:52,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:52,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:33:52,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:52,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2022237029, now seen corresponding path program 1 times [2024-06-27 18:33:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267362761] [2024-06-27 18:33:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:53,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267362761] [2024-06-27 18:33:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267362761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:33:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207702755] [2024-06-27 18:33:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:33:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:33:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:33:53,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:53,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 565 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:53,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:54,666 INFO L124 PetriNetUnfolderBase]: 4331/6963 cut-off events. [2024-06-27 18:33:54,667 INFO L125 PetriNetUnfolderBase]: For 18488/18494 co-relation queries the response was YES. [2024-06-27 18:33:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21823 conditions, 6963 events. 4331/6963 cut-off events. For 18488/18494 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 43243 event pairs, 1569 based on Foata normal form. 6/6770 useless extension candidates. Maximal degree in co-relation 21794. Up to 5960 conditions per place. [2024-06-27 18:33:54,729 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 112 selfloop transitions, 40 changer transitions 0/161 dead transitions. [2024-06-27 18:33:54,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 161 transitions, 1238 flow [2024-06-27 18:33:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:33:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:33:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:33:54,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 18:33:54,732 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 565 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:33:54,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 161 transitions, 1238 flow [2024-06-27 18:33:54,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 161 transitions, 1172 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:33:54,752 INFO L231 Difference]: Finished difference. Result has 85 places, 119 transitions, 870 flow [2024-06-27 18:33:54,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=85, PETRI_TRANSITIONS=119} [2024-06-27 18:33:54,753 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-27 18:33:54,753 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 119 transitions, 870 flow [2024-06-27 18:33:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:54,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:54,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:54,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:33:54,754 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:54,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1507215345, now seen corresponding path program 2 times [2024-06-27 18:33:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13278454] [2024-06-27 18:33:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:55,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:55,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13278454] [2024-06-27 18:33:55,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13278454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:55,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:55,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:33:55,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373733931] [2024-06-27 18:33:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:55,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:33:55,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:33:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:33:55,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:55,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 119 transitions, 870 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:55,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:55,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:55,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:56,540 INFO L124 PetriNetUnfolderBase]: 4357/7095 cut-off events. [2024-06-27 18:33:56,540 INFO L125 PetriNetUnfolderBase]: For 22867/22871 co-relation queries the response was YES. [2024-06-27 18:33:56,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23617 conditions, 7095 events. 4357/7095 cut-off events. For 22867/22871 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 44784 event pairs, 1655 based on Foata normal form. 6/6872 useless extension candidates. Maximal degree in co-relation 23585. Up to 5979 conditions per place. [2024-06-27 18:33:56,589 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 106 selfloop transitions, 56 changer transitions 0/171 dead transitions. [2024-06-27 18:33:56,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 171 transitions, 1443 flow [2024-06-27 18:33:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:33:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:33:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:33:56,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-27 18:33:56,591 INFO L175 Difference]: Start difference. First operand has 85 places, 119 transitions, 870 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:33:56,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 171 transitions, 1443 flow [2024-06-27 18:33:56,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 171 transitions, 1385 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:33:56,622 INFO L231 Difference]: Finished difference. Result has 89 places, 125 transitions, 1015 flow [2024-06-27 18:33:56,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1015, PETRI_PLACES=89, PETRI_TRANSITIONS=125} [2024-06-27 18:33:56,623 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-27 18:33:56,623 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 125 transitions, 1015 flow [2024-06-27 18:33:56,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:56,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:56,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:56,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:33:56,624 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:56,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash 274106821, now seen corresponding path program 2 times [2024-06-27 18:33:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:56,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852497703] [2024-06-27 18:33:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:56,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:57,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:57,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852497703] [2024-06-27 18:33:57,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852497703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:57,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:57,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:33:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500025004] [2024-06-27 18:33:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:33:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:33:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:33:57,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:57,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 125 transitions, 1015 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:57,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:57,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:33:58,406 INFO L124 PetriNetUnfolderBase]: 4399/7066 cut-off events. [2024-06-27 18:33:58,406 INFO L125 PetriNetUnfolderBase]: For 28356/28366 co-relation queries the response was YES. [2024-06-27 18:33:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24752 conditions, 7066 events. 4399/7066 cut-off events. For 28356/28366 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43878 event pairs, 1557 based on Foata normal form. 12/6876 useless extension candidates. Maximal degree in co-relation 24719. Up to 6032 conditions per place. [2024-06-27 18:33:58,461 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 113 selfloop transitions, 48 changer transitions 0/170 dead transitions. [2024-06-27 18:33:58,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 170 transitions, 1553 flow [2024-06-27 18:33:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:33:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:33:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:33:58,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:33:58,465 INFO L175 Difference]: Start difference. First operand has 89 places, 125 transitions, 1015 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:33:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 170 transitions, 1553 flow [2024-06-27 18:33:58,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1490 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:33:58,539 INFO L231 Difference]: Finished difference. Result has 94 places, 133 transitions, 1150 flow [2024-06-27 18:33:58,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1150, PETRI_PLACES=94, PETRI_TRANSITIONS=133} [2024-06-27 18:33:58,540 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-06-27 18:33:58,540 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 133 transitions, 1150 flow [2024-06-27 18:33:58,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:58,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:33:58,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:33:58,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:33:58,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:33:58,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:33:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1330083825, now seen corresponding path program 3 times [2024-06-27 18:33:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:33:58,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454550686] [2024-06-27 18:33:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:33:58,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:33:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:33:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:33:59,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:33:59,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454550686] [2024-06-27 18:33:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454550686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:33:59,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:33:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:33:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543216125] [2024-06-27 18:33:59,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:33:59,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:33:59,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:33:59,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:33:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:33:59,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:33:59,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 133 transitions, 1150 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:33:59,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:33:59,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:33:59,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:00,416 INFO L124 PetriNetUnfolderBase]: 4394/6786 cut-off events. [2024-06-27 18:34:00,416 INFO L125 PetriNetUnfolderBase]: For 30466/30466 co-relation queries the response was YES. [2024-06-27 18:34:00,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25002 conditions, 6786 events. 4394/6786 cut-off events. For 30466/30466 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 39909 event pairs, 1545 based on Foata normal form. 2/6679 useless extension candidates. Maximal degree in co-relation 24966. Up to 6032 conditions per place. [2024-06-27 18:34:00,456 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 109 selfloop transitions, 56 changer transitions 0/174 dead transitions. [2024-06-27 18:34:00,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 174 transitions, 1610 flow [2024-06-27 18:34:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:34:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:34:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:34:00,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 18:34:00,458 INFO L175 Difference]: Start difference. First operand has 94 places, 133 transitions, 1150 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:34:00,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 174 transitions, 1610 flow [2024-06-27 18:34:00,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 174 transitions, 1533 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 18:34:00,492 INFO L231 Difference]: Finished difference. Result has 99 places, 133 transitions, 1196 flow [2024-06-27 18:34:00,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1196, PETRI_PLACES=99, PETRI_TRANSITIONS=133} [2024-06-27 18:34:00,493 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2024-06-27 18:34:00,493 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 133 transitions, 1196 flow [2024-06-27 18:34:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:00,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:00,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:34:00,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:00,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2047616937, now seen corresponding path program 3 times [2024-06-27 18:34:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958192622] [2024-06-27 18:34:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:01,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958192622] [2024-06-27 18:34:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958192622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:01,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:34:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556969189] [2024-06-27 18:34:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:34:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:34:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:34:01,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:01,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 133 transitions, 1196 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:01,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:01,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:01,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:02,582 INFO L124 PetriNetUnfolderBase]: 4384/7045 cut-off events. [2024-06-27 18:34:02,583 INFO L125 PetriNetUnfolderBase]: For 33312/33322 co-relation queries the response was YES. [2024-06-27 18:34:02,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25269 conditions, 7045 events. 4384/7045 cut-off events. For 33312/33322 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43748 event pairs, 1555 based on Foata normal form. 12/6855 useless extension candidates. Maximal degree in co-relation 25231. Up to 6017 conditions per place. [2024-06-27 18:34:02,623 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 117 selfloop transitions, 45 changer transitions 0/171 dead transitions. [2024-06-27 18:34:02,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 171 transitions, 1640 flow [2024-06-27 18:34:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:34:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:34:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:34:02,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:34:02,625 INFO L175 Difference]: Start difference. First operand has 99 places, 133 transitions, 1196 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:34:02,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 171 transitions, 1640 flow [2024-06-27 18:34:02,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1487 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:02,653 INFO L231 Difference]: Finished difference. Result has 100 places, 133 transitions, 1143 flow [2024-06-27 18:34:02,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1143, PETRI_PLACES=100, PETRI_TRANSITIONS=133} [2024-06-27 18:34:02,654 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-27 18:34:02,654 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 133 transitions, 1143 flow [2024-06-27 18:34:02,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:02,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:02,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:02,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:34:02,655 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:02,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1329837561, now seen corresponding path program 1 times [2024-06-27 18:34:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:02,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283618295] [2024-06-27 18:34:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:02,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:03,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:03,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283618295] [2024-06-27 18:34:03,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283618295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:03,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:03,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:34:03,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454163372] [2024-06-27 18:34:03,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:03,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:34:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:34:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:34:03,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:03,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 133 transitions, 1143 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:03,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:03,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:03,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:04,800 INFO L124 PetriNetUnfolderBase]: 3774/6264 cut-off events. [2024-06-27 18:34:04,800 INFO L125 PetriNetUnfolderBase]: For 30695/30695 co-relation queries the response was YES. [2024-06-27 18:34:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22516 conditions, 6264 events. 3774/6264 cut-off events. For 30695/30695 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 39840 event pairs, 1303 based on Foata normal form. 4/6066 useless extension candidates. Maximal degree in co-relation 22477. Up to 5335 conditions per place. [2024-06-27 18:34:04,833 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 142 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2024-06-27 18:34:04,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 169 transitions, 1587 flow [2024-06-27 18:34:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:34:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:34:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:34:04,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 18:34:04,835 INFO L175 Difference]: Start difference. First operand has 100 places, 133 transitions, 1143 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:34:04,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 169 transitions, 1587 flow [2024-06-27 18:34:04,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 1498 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:34:04,866 INFO L231 Difference]: Finished difference. Result has 102 places, 136 transitions, 1134 flow [2024-06-27 18:34:04,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=102, PETRI_TRANSITIONS=136} [2024-06-27 18:34:04,867 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-27 18:34:04,867 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 136 transitions, 1134 flow [2024-06-27 18:34:04,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:04,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:04,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:04,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:34:04,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:04,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1606718914, now seen corresponding path program 1 times [2024-06-27 18:34:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:04,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450944716] [2024-06-27 18:34:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:04,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450944716] [2024-06-27 18:34:05,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450944716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:05,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:05,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:34:05,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54308774] [2024-06-27 18:34:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:05,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:34:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:34:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:34:05,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-06-27 18:34:05,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 136 transitions, 1134 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:05,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:05,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-06-27 18:34:05,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:06,296 INFO L124 PetriNetUnfolderBase]: 3510/5939 cut-off events. [2024-06-27 18:34:06,297 INFO L125 PetriNetUnfolderBase]: For 33407/33413 co-relation queries the response was YES. [2024-06-27 18:34:06,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21739 conditions, 5939 events. 3510/5939 cut-off events. For 33407/33413 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 38537 event pairs, 1572 based on Foata normal form. 7/5740 useless extension candidates. Maximal degree in co-relation 21699. Up to 5005 conditions per place. [2024-06-27 18:34:06,348 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 121 selfloop transitions, 9 changer transitions 0/158 dead transitions. [2024-06-27 18:34:06,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 158 transitions, 1503 flow [2024-06-27 18:34:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:34:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:34:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 18:34:06,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 18:34:06,349 INFO L175 Difference]: Start difference. First operand has 102 places, 136 transitions, 1134 flow. Second operand 5 states and 123 transitions. [2024-06-27 18:34:06,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 158 transitions, 1503 flow [2024-06-27 18:34:06,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 158 transitions, 1441 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 18:34:06,386 INFO L231 Difference]: Finished difference. Result has 103 places, 143 transitions, 1178 flow [2024-06-27 18:34:06,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1178, PETRI_PLACES=103, PETRI_TRANSITIONS=143} [2024-06-27 18:34:06,388 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-27 18:34:06,388 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 143 transitions, 1178 flow [2024-06-27 18:34:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:06,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:06,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:34:06,389 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:06,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 520822293, now seen corresponding path program 1 times [2024-06-27 18:34:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470387505] [2024-06-27 18:34:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:07,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:07,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470387505] [2024-06-27 18:34:07,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470387505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:07,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:07,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:07,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724536511] [2024-06-27 18:34:07,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:07,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:07,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:07,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:07,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:07,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 143 transitions, 1178 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:07,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:07,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:07,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:08,561 INFO L124 PetriNetUnfolderBase]: 4423/7092 cut-off events. [2024-06-27 18:34:08,561 INFO L125 PetriNetUnfolderBase]: For 44287/44287 co-relation queries the response was YES. [2024-06-27 18:34:08,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27333 conditions, 7092 events. 4423/7092 cut-off events. For 44287/44287 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43903 event pairs, 1658 based on Foata normal form. 4/6907 useless extension candidates. Maximal degree in co-relation 27291. Up to 6213 conditions per place. [2024-06-27 18:34:08,615 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 163 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-27 18:34:08,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 200 transitions, 1793 flow [2024-06-27 18:34:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:34:08,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 18:34:08,617 INFO L175 Difference]: Start difference. First operand has 103 places, 143 transitions, 1178 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:34:08,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 200 transitions, 1793 flow [2024-06-27 18:34:08,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 200 transitions, 1772 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 18:34:08,661 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 1340 flow [2024-06-27 18:34:08,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1340, PETRI_PLACES=111, PETRI_TRANSITIONS=155} [2024-06-27 18:34:08,662 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2024-06-27 18:34:08,662 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 1340 flow [2024-06-27 18:34:08,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:08,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:08,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:08,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:34:08,663 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:08,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:08,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2014050715, now seen corresponding path program 2 times [2024-06-27 18:34:08,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:08,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143094366] [2024-06-27 18:34:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:08,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:09,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:09,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143094366] [2024-06-27 18:34:09,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143094366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:09,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:09,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758374334] [2024-06-27 18:34:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:09,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:09,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:09,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:09,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 155 transitions, 1340 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:09,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:09,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:09,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:10,718 INFO L124 PetriNetUnfolderBase]: 4517/7256 cut-off events. [2024-06-27 18:34:10,718 INFO L125 PetriNetUnfolderBase]: For 53215/53219 co-relation queries the response was YES. [2024-06-27 18:34:10,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29503 conditions, 7256 events. 4517/7256 cut-off events. For 53215/53219 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 45024 event pairs, 1453 based on Foata normal form. 5/7072 useless extension candidates. Maximal degree in co-relation 29457. Up to 5933 conditions per place. [2024-06-27 18:34:10,766 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 147 selfloop transitions, 69 changer transitions 0/225 dead transitions. [2024-06-27 18:34:10,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 225 transitions, 2246 flow [2024-06-27 18:34:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:34:10,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-27 18:34:10,770 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 1340 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:34:10,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 225 transitions, 2246 flow [2024-06-27 18:34:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 225 transitions, 2157 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 18:34:10,823 INFO L231 Difference]: Finished difference. Result has 117 places, 173 transitions, 1649 flow [2024-06-27 18:34:10,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1649, PETRI_PLACES=117, PETRI_TRANSITIONS=173} [2024-06-27 18:34:10,824 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2024-06-27 18:34:10,824 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 173 transitions, 1649 flow [2024-06-27 18:34:10,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:10,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:10,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:34:10,825 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:10,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash 520966443, now seen corresponding path program 3 times [2024-06-27 18:34:10,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:10,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850245391] [2024-06-27 18:34:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:11,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:11,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850245391] [2024-06-27 18:34:11,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850245391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:11,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:11,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:11,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585415321] [2024-06-27 18:34:11,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:11,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:11,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:11,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:11,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 173 transitions, 1649 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:11,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:11,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:11,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:12,880 INFO L124 PetriNetUnfolderBase]: 4507/7242 cut-off events. [2024-06-27 18:34:12,880 INFO L125 PetriNetUnfolderBase]: For 60347/60351 co-relation queries the response was YES. [2024-06-27 18:34:12,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31038 conditions, 7242 events. 4507/7242 cut-off events. For 60347/60351 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44969 event pairs, 1451 based on Foata normal form. 5/7058 useless extension candidates. Maximal degree in co-relation 30989. Up to 5925 conditions per place. [2024-06-27 18:34:12,935 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 147 selfloop transitions, 68 changer transitions 0/224 dead transitions. [2024-06-27 18:34:12,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 224 transitions, 2306 flow [2024-06-27 18:34:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:34:12,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-27 18:34:12,939 INFO L175 Difference]: Start difference. First operand has 117 places, 173 transitions, 1649 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:34:12,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 224 transitions, 2306 flow [2024-06-27 18:34:13,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 2217 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 18:34:13,011 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 1705 flow [2024-06-27 18:34:13,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-06-27 18:34:13,011 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-27 18:34:13,012 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 1705 flow [2024-06-27 18:34:13,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:13,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:13,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:34:13,012 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:13,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash 655772423, now seen corresponding path program 4 times [2024-06-27 18:34:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706539584] [2024-06-27 18:34:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:13,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:13,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706539584] [2024-06-27 18:34:13,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706539584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:13,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:13,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:13,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427345052] [2024-06-27 18:34:13,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:13,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:13,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:13,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:13,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:13,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:13,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 1705 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:13,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:13,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:15,138 INFO L124 PetriNetUnfolderBase]: 4549/7311 cut-off events. [2024-06-27 18:34:15,138 INFO L125 PetriNetUnfolderBase]: For 63986/63986 co-relation queries the response was YES. [2024-06-27 18:34:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31636 conditions, 7311 events. 4549/7311 cut-off events. For 63986/63986 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45453 event pairs, 1460 based on Foata normal form. 4/7122 useless extension candidates. Maximal degree in co-relation 31585. Up to 5961 conditions per place. [2024-06-27 18:34:15,193 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 138 selfloop transitions, 77 changer transitions 0/224 dead transitions. [2024-06-27 18:34:15,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 224 transitions, 2435 flow [2024-06-27 18:34:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:34:15,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:34:15,195 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 1705 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:34:15,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 224 transitions, 2435 flow [2024-06-27 18:34:15,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 224 transitions, 2269 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:15,253 INFO L231 Difference]: Finished difference. Result has 126 places, 179 transitions, 1824 flow [2024-06-27 18:34:15,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1824, PETRI_PLACES=126, PETRI_TRANSITIONS=179} [2024-06-27 18:34:15,254 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-27 18:34:15,254 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 179 transitions, 1824 flow [2024-06-27 18:34:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:15,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:15,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:15,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:34:15,255 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:15,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1814748925, now seen corresponding path program 5 times [2024-06-27 18:34:15,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:15,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275956814] [2024-06-27 18:34:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:15,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:16,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:16,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275956814] [2024-06-27 18:34:16,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275956814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:16,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:16,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:16,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805136470] [2024-06-27 18:34:16,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:16,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:16,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:16,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 179 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:16,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:16,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:16,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:17,328 INFO L124 PetriNetUnfolderBase]: 4591/7370 cut-off events. [2024-06-27 18:34:17,329 INFO L125 PetriNetUnfolderBase]: For 68922/68922 co-relation queries the response was YES. [2024-06-27 18:34:17,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32444 conditions, 7370 events. 4591/7370 cut-off events. For 68922/68922 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45774 event pairs, 1452 based on Foata normal form. 4/7181 useless extension candidates. Maximal degree in co-relation 32391. Up to 5997 conditions per place. [2024-06-27 18:34:17,384 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 146 selfloop transitions, 76 changer transitions 0/231 dead transitions. [2024-06-27 18:34:17,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 231 transitions, 2568 flow [2024-06-27 18:34:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:34:17,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 18:34:17,386 INFO L175 Difference]: Start difference. First operand has 126 places, 179 transitions, 1824 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:34:17,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 231 transitions, 2568 flow [2024-06-27 18:34:17,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 231 transitions, 2424 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 18:34:17,462 INFO L231 Difference]: Finished difference. Result has 130 places, 183 transitions, 1911 flow [2024-06-27 18:34:17,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1690, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1911, PETRI_PLACES=130, PETRI_TRANSITIONS=183} [2024-06-27 18:34:17,462 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-27 18:34:17,462 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 183 transitions, 1911 flow [2024-06-27 18:34:17,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:17,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:17,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:34:17,463 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:17,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1591274895, now seen corresponding path program 6 times [2024-06-27 18:34:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:17,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274825774] [2024-06-27 18:34:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:18,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:18,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274825774] [2024-06-27 18:34:18,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274825774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:18,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:18,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:18,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763023969] [2024-06-27 18:34:18,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:18,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:18,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:18,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:18,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 183 transitions, 1911 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:18,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:18,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:18,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:19,447 INFO L124 PetriNetUnfolderBase]: 4581/7356 cut-off events. [2024-06-27 18:34:19,448 INFO L125 PetriNetUnfolderBase]: For 71789/71789 co-relation queries the response was YES. [2024-06-27 18:34:19,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32317 conditions, 7356 events. 4581/7356 cut-off events. For 71789/71789 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45652 event pairs, 1450 based on Foata normal form. 4/7167 useless extension candidates. Maximal degree in co-relation 32263. Up to 5989 conditions per place. [2024-06-27 18:34:19,523 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 143 selfloop transitions, 77 changer transitions 0/229 dead transitions. [2024-06-27 18:34:19,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 229 transitions, 2503 flow [2024-06-27 18:34:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:34:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:34:19,525 INFO L175 Difference]: Start difference. First operand has 130 places, 183 transitions, 1911 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:34:19,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 229 transitions, 2503 flow [2024-06-27 18:34:19,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 229 transitions, 2220 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 18:34:19,623 INFO L231 Difference]: Finished difference. Result has 131 places, 183 transitions, 1791 flow [2024-06-27 18:34:19,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=131, PETRI_TRANSITIONS=183} [2024-06-27 18:34:19,624 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-27 18:34:19,624 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 183 transitions, 1791 flow [2024-06-27 18:34:19,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:19,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:19,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:19,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:34:19,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:19,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1762600689, now seen corresponding path program 1 times [2024-06-27 18:34:19,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:19,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268710029] [2024-06-27 18:34:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268710029] [2024-06-27 18:34:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268710029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:20,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:20,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:34:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602900672] [2024-06-27 18:34:20,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:20,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:34:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:34:20,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:34:20,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:20,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 183 transitions, 1791 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:20,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:20,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:20,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:21,321 INFO L124 PetriNetUnfolderBase]: 4231/6967 cut-off events. [2024-06-27 18:34:21,321 INFO L125 PetriNetUnfolderBase]: For 72336/72358 co-relation queries the response was YES. [2024-06-27 18:34:21,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30402 conditions, 6967 events. 4231/6967 cut-off events. For 72336/72358 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 44643 event pairs, 1791 based on Foata normal form. 9/6758 useless extension candidates. Maximal degree in co-relation 30348. Up to 6003 conditions per place. [2024-06-27 18:34:21,382 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 168 selfloop transitions, 12 changer transitions 0/207 dead transitions. [2024-06-27 18:34:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2247 flow [2024-06-27 18:34:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:34:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:34:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 18:34:21,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 18:34:21,383 INFO L175 Difference]: Start difference. First operand has 131 places, 183 transitions, 1791 flow. Second operand 6 states and 141 transitions. [2024-06-27 18:34:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2247 flow [2024-06-27 18:34:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 207 transitions, 2093 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:21,444 INFO L231 Difference]: Finished difference. Result has 131 places, 186 transitions, 1697 flow [2024-06-27 18:34:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1697, PETRI_PLACES=131, PETRI_TRANSITIONS=186} [2024-06-27 18:34:21,444 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-27 18:34:21,444 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 186 transitions, 1697 flow [2024-06-27 18:34:21,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:21,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:21,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:21,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:34:21,445 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:21,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1926295496, now seen corresponding path program 1 times [2024-06-27 18:34:21,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:21,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239185523] [2024-06-27 18:34:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:21,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239185523] [2024-06-27 18:34:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239185523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:22,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003380457] [2024-06-27 18:34:22,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:22,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:22,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:22,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 186 transitions, 1697 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:22,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:22,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:22,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:23,734 INFO L124 PetriNetUnfolderBase]: 4939/8021 cut-off events. [2024-06-27 18:34:23,734 INFO L125 PetriNetUnfolderBase]: For 92257/92257 co-relation queries the response was YES. [2024-06-27 18:34:23,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35837 conditions, 8021 events. 4939/8021 cut-off events. For 92257/92257 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 51224 event pairs, 1259 based on Foata normal form. 4/7747 useless extension candidates. Maximal degree in co-relation 35782. Up to 6769 conditions per place. [2024-06-27 18:34:23,786 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 202 selfloop transitions, 41 changer transitions 0/253 dead transitions. [2024-06-27 18:34:23,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 253 transitions, 2541 flow [2024-06-27 18:34:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:34:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:34:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:34:23,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 18:34:23,787 INFO L175 Difference]: Start difference. First operand has 131 places, 186 transitions, 1697 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:34:23,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 253 transitions, 2541 flow [2024-06-27 18:34:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 253 transitions, 2503 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:34:23,856 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 1824 flow [2024-06-27 18:34:23,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1824, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2024-06-27 18:34:23,857 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-27 18:34:23,857 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 1824 flow [2024-06-27 18:34:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:23,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:23,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:23,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:34:23,858 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:23,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1145203668, now seen corresponding path program 2 times [2024-06-27 18:34:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446156526] [2024-06-27 18:34:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446156526] [2024-06-27 18:34:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446156526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:24,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543988095] [2024-06-27 18:34:24,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:24,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:24,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:24,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:24,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:24,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:26,211 INFO L124 PetriNetUnfolderBase]: 4931/8011 cut-off events. [2024-06-27 18:34:26,211 INFO L125 PetriNetUnfolderBase]: For 99562/99562 co-relation queries the response was YES. [2024-06-27 18:34:26,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36502 conditions, 8011 events. 4931/8011 cut-off events. For 99562/99562 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 51207 event pairs, 1627 based on Foata normal form. 4/7741 useless extension candidates. Maximal degree in co-relation 36446. Up to 6861 conditions per place. [2024-06-27 18:34:26,263 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 194 selfloop transitions, 37 changer transitions 0/241 dead transitions. [2024-06-27 18:34:26,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 241 transitions, 2450 flow [2024-06-27 18:34:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:34:26,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 18:34:26,264 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 1824 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:34:26,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 241 transitions, 2450 flow [2024-06-27 18:34:26,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 241 transitions, 2355 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 18:34:26,359 INFO L231 Difference]: Finished difference. Result has 139 places, 190 transitions, 1811 flow [2024-06-27 18:34:26,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1811, PETRI_PLACES=139, PETRI_TRANSITIONS=190} [2024-06-27 18:34:26,360 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 85 predicate places. [2024-06-27 18:34:26,360 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 190 transitions, 1811 flow [2024-06-27 18:34:26,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:26,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:26,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:26,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:34:26,361 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:26,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2044443626, now seen corresponding path program 3 times [2024-06-27 18:34:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:26,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894439622] [2024-06-27 18:34:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894439622] [2024-06-27 18:34:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894439622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:27,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:27,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:27,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931002756] [2024-06-27 18:34:27,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:27,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:27,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:27,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:27,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:27,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:27,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 190 transitions, 1811 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:27,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:27,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:27,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:28,442 INFO L124 PetriNetUnfolderBase]: 4959/8070 cut-off events. [2024-06-27 18:34:28,443 INFO L125 PetriNetUnfolderBase]: For 105447/105451 co-relation queries the response was YES. [2024-06-27 18:34:28,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36859 conditions, 8070 events. 4959/8070 cut-off events. For 105447/105451 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 51726 event pairs, 1586 based on Foata normal form. 8/7807 useless extension candidates. Maximal degree in co-relation 36801. Up to 6750 conditions per place. [2024-06-27 18:34:28,511 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 158 selfloop transitions, 74 changer transitions 0/242 dead transitions. [2024-06-27 18:34:28,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2477 flow [2024-06-27 18:34:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 18:34:28,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:34:28,513 INFO L175 Difference]: Start difference. First operand has 139 places, 190 transitions, 1811 flow. Second operand 8 states and 200 transitions. [2024-06-27 18:34:28,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2477 flow [2024-06-27 18:34:28,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 242 transitions, 2397 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:34:28,609 INFO L231 Difference]: Finished difference. Result has 140 places, 192 transitions, 1931 flow [2024-06-27 18:34:28,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1931, PETRI_PLACES=140, PETRI_TRANSITIONS=192} [2024-06-27 18:34:28,609 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-27 18:34:28,609 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 192 transitions, 1931 flow [2024-06-27 18:34:28,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:28,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:28,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:28,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:34:28,610 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:28,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2044628324, now seen corresponding path program 1 times [2024-06-27 18:34:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:28,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666388009] [2024-06-27 18:34:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:29,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666388009] [2024-06-27 18:34:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666388009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:29,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:29,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165386594] [2024-06-27 18:34:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:29,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:29,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:29,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 192 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:29,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:29,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:29,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:30,820 INFO L124 PetriNetUnfolderBase]: 4993/8039 cut-off events. [2024-06-27 18:34:30,821 INFO L125 PetriNetUnfolderBase]: For 115789/115793 co-relation queries the response was YES. [2024-06-27 18:34:30,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37867 conditions, 8039 events. 4993/8039 cut-off events. For 115789/115793 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 50972 event pairs, 1458 based on Foata normal form. 5/7799 useless extension candidates. Maximal degree in co-relation 37808. Up to 6807 conditions per place. [2024-06-27 18:34:30,891 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 180 selfloop transitions, 51 changer transitions 0/241 dead transitions. [2024-06-27 18:34:30,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 241 transitions, 2583 flow [2024-06-27 18:34:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 18:34:30,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-27 18:34:30,892 INFO L175 Difference]: Start difference. First operand has 140 places, 192 transitions, 1931 flow. Second operand 8 states and 198 transitions. [2024-06-27 18:34:30,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 241 transitions, 2583 flow [2024-06-27 18:34:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 241 transitions, 2409 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:30,997 INFO L231 Difference]: Finished difference. Result has 142 places, 195 transitions, 1917 flow [2024-06-27 18:34:30,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1917, PETRI_PLACES=142, PETRI_TRANSITIONS=195} [2024-06-27 18:34:30,997 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 88 predicate places. [2024-06-27 18:34:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 195 transitions, 1917 flow [2024-06-27 18:34:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:30,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:30,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:34:30,998 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:30,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1613407927, now seen corresponding path program 1 times [2024-06-27 18:34:30,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289208825] [2024-06-27 18:34:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289208825] [2024-06-27 18:34:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289208825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:31,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:34:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080352865] [2024-06-27 18:34:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:31,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:34:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:34:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:34:31,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:31,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 195 transitions, 1917 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:31,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:31,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:31,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:32,655 INFO L124 PetriNetUnfolderBase]: 4737/7751 cut-off events. [2024-06-27 18:34:32,655 INFO L125 PetriNetUnfolderBase]: For 120964/120986 co-relation queries the response was YES. [2024-06-27 18:34:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37122 conditions, 7751 events. 4737/7751 cut-off events. For 120964/120986 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 50095 event pairs, 1778 based on Foata normal form. 10/7479 useless extension candidates. Maximal degree in co-relation 37062. Up to 6593 conditions per place. [2024-06-27 18:34:32,719 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 186 selfloop transitions, 17 changer transitions 0/232 dead transitions. [2024-06-27 18:34:32,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 232 transitions, 2560 flow [2024-06-27 18:34:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:34:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:34:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:34:32,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034722222222222 [2024-06-27 18:34:32,721 INFO L175 Difference]: Start difference. First operand has 142 places, 195 transitions, 1917 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:34:32,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 232 transitions, 2560 flow [2024-06-27 18:34:32,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 232 transitions, 2416 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:32,804 INFO L231 Difference]: Finished difference. Result has 143 places, 206 transitions, 1991 flow [2024-06-27 18:34:32,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1991, PETRI_PLACES=143, PETRI_TRANSITIONS=206} [2024-06-27 18:34:32,805 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-27 18:34:32,805 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 206 transitions, 1991 flow [2024-06-27 18:34:32,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:32,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:32,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:34:32,806 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:32,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1689753678, now seen corresponding path program 4 times [2024-06-27 18:34:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:32,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479197038] [2024-06-27 18:34:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:32,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:33,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:33,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479197038] [2024-06-27 18:34:33,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479197038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:33,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:33,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:33,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095292248] [2024-06-27 18:34:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:33,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:33,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:33,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:33,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 206 transitions, 1991 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:33,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:33,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:33,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:34,930 INFO L124 PetriNetUnfolderBase]: 5061/8201 cut-off events. [2024-06-27 18:34:34,930 INFO L125 PetriNetUnfolderBase]: For 129818/129818 co-relation queries the response was YES. [2024-06-27 18:34:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39921 conditions, 8201 events. 5061/8201 cut-off events. For 129818/129818 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 52272 event pairs, 1692 based on Foata normal form. 4/7920 useless extension candidates. Maximal degree in co-relation 39859. Up to 6882 conditions per place. [2024-06-27 18:34:35,011 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 166 selfloop transitions, 79 changer transitions 0/255 dead transitions. [2024-06-27 18:34:35,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 255 transitions, 2693 flow [2024-06-27 18:34:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 18:34:35,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-27 18:34:35,013 INFO L175 Difference]: Start difference. First operand has 143 places, 206 transitions, 1991 flow. Second operand 8 states and 197 transitions. [2024-06-27 18:34:35,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 255 transitions, 2693 flow [2024-06-27 18:34:35,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 255 transitions, 2652 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:34:35,117 INFO L231 Difference]: Finished difference. Result has 148 places, 208 transitions, 2166 flow [2024-06-27 18:34:35,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2166, PETRI_PLACES=148, PETRI_TRANSITIONS=208} [2024-06-27 18:34:35,118 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-06-27 18:34:35,118 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 208 transitions, 2166 flow [2024-06-27 18:34:35,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:35,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:35,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:35,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:34:35,119 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:35,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:35,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1689938376, now seen corresponding path program 2 times [2024-06-27 18:34:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:35,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514329035] [2024-06-27 18:34:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:36,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:36,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514329035] [2024-06-27 18:34:36,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514329035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:36,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:36,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:34:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25108967] [2024-06-27 18:34:36,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:36,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:34:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:34:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:34:36,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:36,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 208 transitions, 2166 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:36,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:36,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:36,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:37,688 INFO L124 PetriNetUnfolderBase]: 5104/8180 cut-off events. [2024-06-27 18:34:37,688 INFO L125 PetriNetUnfolderBase]: For 141407/141422 co-relation queries the response was YES. [2024-06-27 18:34:37,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40988 conditions, 8180 events. 5104/8180 cut-off events. For 141407/141422 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 51485 event pairs, 1591 based on Foata normal form. 16/7942 useless extension candidates. Maximal degree in co-relation 40925. Up to 6951 conditions per place. [2024-06-27 18:34:37,763 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 193 selfloop transitions, 54 changer transitions 0/257 dead transitions. [2024-06-27 18:34:37,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 257 transitions, 2872 flow [2024-06-27 18:34:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 18:34:37,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 18:34:37,765 INFO L175 Difference]: Start difference. First operand has 148 places, 208 transitions, 2166 flow. Second operand 8 states and 195 transitions. [2024-06-27 18:34:37,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 257 transitions, 2872 flow [2024-06-27 18:34:37,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 257 transitions, 2684 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:37,883 INFO L231 Difference]: Finished difference. Result has 150 places, 211 transitions, 2152 flow [2024-06-27 18:34:37,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2152, PETRI_PLACES=150, PETRI_TRANSITIONS=211} [2024-06-27 18:34:37,883 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-27 18:34:37,883 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 211 transitions, 2152 flow [2024-06-27 18:34:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:37,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:37,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:34:37,884 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:37,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1926113736, now seen corresponding path program 3 times [2024-06-27 18:34:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:37,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100437913] [2024-06-27 18:34:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:37,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:38,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100437913] [2024-06-27 18:34:38,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100437913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:38,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:38,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363477220] [2024-06-27 18:34:38,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:38,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:38,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:38,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 211 transitions, 2152 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:38,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:38,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:38,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:40,243 INFO L124 PetriNetUnfolderBase]: 5138/8234 cut-off events. [2024-06-27 18:34:40,243 INFO L125 PetriNetUnfolderBase]: For 151038/151053 co-relation queries the response was YES. [2024-06-27 18:34:40,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42019 conditions, 8234 events. 5138/8234 cut-off events. For 151038/151053 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 51940 event pairs, 1595 based on Foata normal form. 16/7997 useless extension candidates. Maximal degree in co-relation 41955. Up to 7001 conditions per place. [2024-06-27 18:34:40,317 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 190 selfloop transitions, 57 changer transitions 0/257 dead transitions. [2024-06-27 18:34:40,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 257 transitions, 2850 flow [2024-06-27 18:34:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:34:40,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-06-27 18:34:40,319 INFO L175 Difference]: Start difference. First operand has 150 places, 211 transitions, 2152 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:34:40,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 257 transitions, 2850 flow [2024-06-27 18:34:40,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 2700 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:40,444 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 2188 flow [2024-06-27 18:34:40,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2188, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2024-06-27 18:34:40,445 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-27 18:34:40,445 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 2188 flow [2024-06-27 18:34:40,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:40,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:40,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:40,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:34:40,446 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:40,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1696433496, now seen corresponding path program 4 times [2024-06-27 18:34:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:40,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805409608] [2024-06-27 18:34:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:41,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:41,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805409608] [2024-06-27 18:34:41,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805409608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:41,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:41,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:34:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169535292] [2024-06-27 18:34:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:41,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:34:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:34:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:34:41,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:41,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 2188 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:41,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:41,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:41,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:42,579 INFO L124 PetriNetUnfolderBase]: 5094/8006 cut-off events. [2024-06-27 18:34:42,580 INFO L125 PetriNetUnfolderBase]: For 158525/158540 co-relation queries the response was YES. [2024-06-27 18:34:42,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42275 conditions, 8006 events. 5094/8006 cut-off events. For 158525/158540 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 49474 event pairs, 1473 based on Foata normal form. 16/7829 useless extension candidates. Maximal degree in co-relation 42210. Up to 6805 conditions per place. [2024-06-27 18:34:42,654 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 182 selfloop transitions, 68 changer transitions 0/260 dead transitions. [2024-06-27 18:34:42,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 260 transitions, 2898 flow [2024-06-27 18:34:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:34:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:34:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:34:42,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-06-27 18:34:42,655 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 2188 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:34:42,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 260 transitions, 2898 flow [2024-06-27 18:34:42,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 260 transitions, 2736 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:42,807 INFO L231 Difference]: Finished difference. Result has 154 places, 217 transitions, 2240 flow [2024-06-27 18:34:42,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2240, PETRI_PLACES=154, PETRI_TRANSITIONS=217} [2024-06-27 18:34:42,808 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-27 18:34:42,808 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 217 transitions, 2240 flow [2024-06-27 18:34:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:42,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:42,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:42,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:34:42,808 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:42,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1510347745, now seen corresponding path program 2 times [2024-06-27 18:34:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:42,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967226599] [2024-06-27 18:34:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:42,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:43,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967226599] [2024-06-27 18:34:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967226599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:43,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:34:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153955625] [2024-06-27 18:34:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:34:43,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:34:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:34:43,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:43,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 217 transitions, 2240 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:43,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:43,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:43,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:44,436 INFO L124 PetriNetUnfolderBase]: 4739/7588 cut-off events. [2024-06-27 18:34:44,437 INFO L125 PetriNetUnfolderBase]: For 162081/162107 co-relation queries the response was YES. [2024-06-27 18:34:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40215 conditions, 7588 events. 4739/7588 cut-off events. For 162081/162107 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 48030 event pairs, 1773 based on Foata normal form. 6/7355 useless extension candidates. Maximal degree in co-relation 40149. Up to 6567 conditions per place. [2024-06-27 18:34:44,508 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 189 selfloop transitions, 22 changer transitions 0/243 dead transitions. [2024-06-27 18:34:44,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 243 transitions, 2800 flow [2024-06-27 18:34:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:34:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:34:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 18:34:44,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965277777777778 [2024-06-27 18:34:44,509 INFO L175 Difference]: Start difference. First operand has 154 places, 217 transitions, 2240 flow. Second operand 6 states and 143 transitions. [2024-06-27 18:34:44,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 243 transitions, 2800 flow [2024-06-27 18:34:44,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 243 transitions, 2610 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 18:34:44,666 INFO L231 Difference]: Finished difference. Result has 154 places, 220 transitions, 2140 flow [2024-06-27 18:34:44,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2140, PETRI_PLACES=154, PETRI_TRANSITIONS=220} [2024-06-27 18:34:44,667 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-27 18:34:44,667 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 220 transitions, 2140 flow [2024-06-27 18:34:44,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:44,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:44,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:44,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:34:44,667 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:44,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -295732195, now seen corresponding path program 1 times [2024-06-27 18:34:44,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:44,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755826644] [2024-06-27 18:34:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755826644] [2024-06-27 18:34:45,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755826644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:45,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:45,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:34:45,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15963519] [2024-06-27 18:34:45,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:45,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:34:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:34:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:34:45,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:45,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 220 transitions, 2140 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:45,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:45,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:45,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:46,497 INFO L124 PetriNetUnfolderBase]: 4545/7331 cut-off events. [2024-06-27 18:34:46,497 INFO L125 PetriNetUnfolderBase]: For 152465/152465 co-relation queries the response was YES. [2024-06-27 18:34:46,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39461 conditions, 7331 events. 4545/7331 cut-off events. For 152465/152465 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 46253 event pairs, 1544 based on Foata normal form. 1/7130 useless extension candidates. Maximal degree in co-relation 39394. Up to 6418 conditions per place. [2024-06-27 18:34:46,569 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 224 selfloop transitions, 13 changer transitions 0/248 dead transitions. [2024-06-27 18:34:46,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 2778 flow [2024-06-27 18:34:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:34:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:34:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 18:34:46,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-06-27 18:34:46,570 INFO L175 Difference]: Start difference. First operand has 154 places, 220 transitions, 2140 flow. Second operand 6 states and 142 transitions. [2024-06-27 18:34:46,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 2778 flow [2024-06-27 18:34:46,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 248 transitions, 2712 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 18:34:46,742 INFO L231 Difference]: Finished difference. Result has 157 places, 227 transitions, 2211 flow [2024-06-27 18:34:46,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2211, PETRI_PLACES=157, PETRI_TRANSITIONS=227} [2024-06-27 18:34:46,742 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-06-27 18:34:46,742 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 227 transitions, 2211 flow [2024-06-27 18:34:46,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:46,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:46,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:34:46,743 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:46,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1193945671, now seen corresponding path program 2 times [2024-06-27 18:34:46,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:46,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112139150] [2024-06-27 18:34:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:47,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112139150] [2024-06-27 18:34:47,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112139150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:47,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:34:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254957589] [2024-06-27 18:34:47,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:34:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:34:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:34:47,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:47,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 227 transitions, 2211 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:47,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:47,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:47,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:48,328 INFO L124 PetriNetUnfolderBase]: 4524/7294 cut-off events. [2024-06-27 18:34:48,328 INFO L125 PetriNetUnfolderBase]: For 160769/160775 co-relation queries the response was YES. [2024-06-27 18:34:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40257 conditions, 7294 events. 4524/7294 cut-off events. For 160769/160775 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 45959 event pairs, 1521 based on Foata normal form. 7/7111 useless extension candidates. Maximal degree in co-relation 40188. Up to 6369 conditions per place. [2024-06-27 18:34:48,396 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 222 selfloop transitions, 18 changer transitions 0/251 dead transitions. [2024-06-27 18:34:48,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 251 transitions, 2831 flow [2024-06-27 18:34:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:34:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:34:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 18:34:48,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965277777777778 [2024-06-27 18:34:48,397 INFO L175 Difference]: Start difference. First operand has 157 places, 227 transitions, 2211 flow. Second operand 6 states and 143 transitions. [2024-06-27 18:34:48,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 251 transitions, 2831 flow [2024-06-27 18:34:48,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 251 transitions, 2780 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:34:48,550 INFO L231 Difference]: Finished difference. Result has 160 places, 230 transitions, 2252 flow [2024-06-27 18:34:48,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2252, PETRI_PLACES=160, PETRI_TRANSITIONS=230} [2024-06-27 18:34:48,550 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2024-06-27 18:34:48,551 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 230 transitions, 2252 flow [2024-06-27 18:34:48,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:48,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:48,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:48,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:34:48,551 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:48,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2131315647, now seen corresponding path program 1 times [2024-06-27 18:34:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:48,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330718360] [2024-06-27 18:34:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:48,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330718360] [2024-06-27 18:34:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330718360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:49,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:49,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:34:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286105765] [2024-06-27 18:34:49,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:49,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:34:49,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:34:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:34:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:34:49,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 230 transitions, 2252 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:49,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:49,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:34:49,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:50,269 INFO L124 PetriNetUnfolderBase]: 4500/7237 cut-off events. [2024-06-27 18:34:50,269 INFO L125 PetriNetUnfolderBase]: For 165819/165850 co-relation queries the response was YES. [2024-06-27 18:34:50,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40165 conditions, 7237 events. 4500/7237 cut-off events. For 165819/165850 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 45559 event pairs, 1688 based on Foata normal form. 9/7058 useless extension candidates. Maximal degree in co-relation 40095. Up to 6339 conditions per place. [2024-06-27 18:34:50,340 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 214 selfloop transitions, 15 changer transitions 0/260 dead transitions. [2024-06-27 18:34:50,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 260 transitions, 2876 flow [2024-06-27 18:34:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:34:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:34:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:34:50,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 18:34:50,341 INFO L175 Difference]: Start difference. First operand has 160 places, 230 transitions, 2252 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:34:50,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 260 transitions, 2876 flow [2024-06-27 18:34:50,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 260 transitions, 2808 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 18:34:50,505 INFO L231 Difference]: Finished difference. Result has 163 places, 233 transitions, 2262 flow [2024-06-27 18:34:50,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2262, PETRI_PLACES=163, PETRI_TRANSITIONS=233} [2024-06-27 18:34:50,506 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-27 18:34:50,506 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 233 transitions, 2262 flow [2024-06-27 18:34:50,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:50,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:50,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:50,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:34:50,507 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:50,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1230139218, now seen corresponding path program 1 times [2024-06-27 18:34:50,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:50,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109128128] [2024-06-27 18:34:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109128128] [2024-06-27 18:34:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109128128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:51,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:51,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:34:51,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176539335] [2024-06-27 18:34:51,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:51,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:34:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:51,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:34:51,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:34:51,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:51,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 233 transitions, 2262 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:51,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:51,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:51,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:52,943 INFO L124 PetriNetUnfolderBase]: 5541/8791 cut-off events. [2024-06-27 18:34:52,943 INFO L125 PetriNetUnfolderBase]: For 243250/243256 co-relation queries the response was YES. [2024-06-27 18:34:52,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51480 conditions, 8791 events. 5541/8791 cut-off events. For 243250/243256 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 55371 event pairs, 1527 based on Foata normal form. 22/8544 useless extension candidates. Maximal degree in co-relation 51409. Up to 7249 conditions per place. [2024-06-27 18:34:53,031 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 260 selfloop transitions, 44 changer transitions 0/314 dead transitions. [2024-06-27 18:34:53,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 314 transitions, 3423 flow [2024-06-27 18:34:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:34:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:34:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-27 18:34:53,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-27 18:34:53,033 INFO L175 Difference]: Start difference. First operand has 163 places, 233 transitions, 2262 flow. Second operand 10 states and 251 transitions. [2024-06-27 18:34:53,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 314 transitions, 3423 flow [2024-06-27 18:34:53,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 314 transitions, 3369 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:34:53,212 INFO L231 Difference]: Finished difference. Result has 170 places, 243 transitions, 2497 flow [2024-06-27 18:34:53,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2497, PETRI_PLACES=170, PETRI_TRANSITIONS=243} [2024-06-27 18:34:53,212 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 116 predicate places. [2024-06-27 18:34:53,212 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 243 transitions, 2497 flow [2024-06-27 18:34:53,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:53,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:53,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:53,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:34:53,213 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:53,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1228265268, now seen corresponding path program 2 times [2024-06-27 18:34:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512311556] [2024-06-27 18:34:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:53,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512311556] [2024-06-27 18:34:54,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512311556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:54,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:54,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:34:54,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6466116] [2024-06-27 18:34:54,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:54,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:34:54,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:54,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:34:54,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:34:54,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:54,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 243 transitions, 2497 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:54,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:54,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:54,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:55,718 INFO L124 PetriNetUnfolderBase]: 5638/8965 cut-off events. [2024-06-27 18:34:55,718 INFO L125 PetriNetUnfolderBase]: For 260754/260760 co-relation queries the response was YES. [2024-06-27 18:34:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53585 conditions, 8965 events. 5638/8965 cut-off events. For 260754/260760 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 56751 event pairs, 1897 based on Foata normal form. 22/8723 useless extension candidates. Maximal degree in co-relation 53511. Up to 7496 conditions per place. [2024-06-27 18:34:55,797 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 259 selfloop transitions, 40 changer transitions 0/309 dead transitions. [2024-06-27 18:34:55,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 309 transitions, 3539 flow [2024-06-27 18:34:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:34:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:34:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:34:55,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-27 18:34:55,799 INFO L175 Difference]: Start difference. First operand has 170 places, 243 transitions, 2497 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:34:55,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 309 transitions, 3539 flow [2024-06-27 18:34:56,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 309 transitions, 3434 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 18:34:56,071 INFO L231 Difference]: Finished difference. Result has 175 places, 247 transitions, 2576 flow [2024-06-27 18:34:56,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2576, PETRI_PLACES=175, PETRI_TRANSITIONS=247} [2024-06-27 18:34:56,072 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-27 18:34:56,072 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 247 transitions, 2576 flow [2024-06-27 18:34:56,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:56,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:56,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:56,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:34:56,073 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:56,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash -325666256, now seen corresponding path program 3 times [2024-06-27 18:34:56,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:56,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363748351] [2024-06-27 18:34:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:56,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:56,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:56,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363748351] [2024-06-27 18:34:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363748351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:56,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:34:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634675118] [2024-06-27 18:34:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:56,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:34:56,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:34:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:34:56,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:34:56,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 247 transitions, 2576 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:56,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:34:56,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:34:56,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:34:58,664 INFO L124 PetriNetUnfolderBase]: 5602/8912 cut-off events. [2024-06-27 18:34:58,665 INFO L125 PetriNetUnfolderBase]: For 256894/256900 co-relation queries the response was YES. [2024-06-27 18:34:58,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52411 conditions, 8912 events. 5602/8912 cut-off events. For 256894/256900 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56414 event pairs, 1918 based on Foata normal form. 26/8673 useless extension candidates. Maximal degree in co-relation 52334. Up to 7668 conditions per place. [2024-06-27 18:34:58,741 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 257 selfloop transitions, 37 changer transitions 0/304 dead transitions. [2024-06-27 18:34:58,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 304 transitions, 3394 flow [2024-06-27 18:34:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:34:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:34:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 18:34:58,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-27 18:34:58,743 INFO L175 Difference]: Start difference. First operand has 175 places, 247 transitions, 2576 flow. Second operand 9 states and 221 transitions. [2024-06-27 18:34:58,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 304 transitions, 3394 flow [2024-06-27 18:34:59,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 304 transitions, 3257 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 18:34:59,112 INFO L231 Difference]: Finished difference. Result has 179 places, 248 transitions, 2545 flow [2024-06-27 18:34:59,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2545, PETRI_PLACES=179, PETRI_TRANSITIONS=248} [2024-06-27 18:34:59,112 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2024-06-27 18:34:59,112 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 248 transitions, 2545 flow [2024-06-27 18:34:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:34:59,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:34:59,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:34:59,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:34:59,113 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:34:59,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:34:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1857004234, now seen corresponding path program 4 times [2024-06-27 18:34:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:34:59,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591563855] [2024-06-27 18:34:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:34:59,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:34:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:34:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:34:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:34:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591563855] [2024-06-27 18:34:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591563855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:34:59,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:34:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:34:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955538552] [2024-06-27 18:34:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:34:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:34:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:34:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:34:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:00,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:00,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 248 transitions, 2545 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:00,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:00,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:00,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:01,807 INFO L124 PetriNetUnfolderBase]: 5751/9170 cut-off events. [2024-06-27 18:35:01,807 INFO L125 PetriNetUnfolderBase]: For 261553/261565 co-relation queries the response was YES. [2024-06-27 18:35:01,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53474 conditions, 9170 events. 5751/9170 cut-off events. For 261553/261565 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 58332 event pairs, 1712 based on Foata normal form. 28/8935 useless extension candidates. Maximal degree in co-relation 53395. Up to 7453 conditions per place. [2024-06-27 18:35:01,895 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 210 selfloop transitions, 89 changer transitions 0/309 dead transitions. [2024-06-27 18:35:01,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 309 transitions, 3431 flow [2024-06-27 18:35:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:35:01,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 18:35:01,896 INFO L175 Difference]: Start difference. First operand has 179 places, 248 transitions, 2545 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:35:01,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 309 transitions, 3431 flow [2024-06-27 18:35:02,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 309 transitions, 3357 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:02,184 INFO L231 Difference]: Finished difference. Result has 181 places, 250 transitions, 2721 flow [2024-06-27 18:35:02,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2721, PETRI_PLACES=181, PETRI_TRANSITIONS=250} [2024-06-27 18:35:02,184 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2024-06-27 18:35:02,184 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 250 transitions, 2721 flow [2024-06-27 18:35:02,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:02,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:02,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:02,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:35:02,185 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:02,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1862366614, now seen corresponding path program 5 times [2024-06-27 18:35:02,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:02,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825466424] [2024-06-27 18:35:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:02,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:02,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825466424] [2024-06-27 18:35:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825466424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:02,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065351727] [2024-06-27 18:35:02,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:02,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:02,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:03,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:03,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 250 transitions, 2721 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:03,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:03,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:03,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:04,898 INFO L124 PetriNetUnfolderBase]: 5905/9399 cut-off events. [2024-06-27 18:35:04,898 INFO L125 PetriNetUnfolderBase]: For 287139/287151 co-relation queries the response was YES. [2024-06-27 18:35:04,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56261 conditions, 9399 events. 5905/9399 cut-off events. For 287139/287151 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 59926 event pairs, 1762 based on Foata normal form. 28/9166 useless extension candidates. Maximal degree in co-relation 56181. Up to 7687 conditions per place. [2024-06-27 18:35:04,995 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 214 selfloop transitions, 88 changer transitions 0/312 dead transitions. [2024-06-27 18:35:04,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 312 transitions, 3619 flow [2024-06-27 18:35:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:35:04,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-06-27 18:35:04,997 INFO L175 Difference]: Start difference. First operand has 181 places, 250 transitions, 2721 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:35:04,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 312 transitions, 3619 flow [2024-06-27 18:35:05,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 312 transitions, 3407 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:05,377 INFO L231 Difference]: Finished difference. Result has 183 places, 252 transitions, 2761 flow [2024-06-27 18:35:05,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2761, PETRI_PLACES=183, PETRI_TRANSITIONS=252} [2024-06-27 18:35:05,378 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 129 predicate places. [2024-06-27 18:35:05,378 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 252 transitions, 2761 flow [2024-06-27 18:35:05,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:05,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:05,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:05,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:35:05,379 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:05,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1708005878, now seen corresponding path program 6 times [2024-06-27 18:35:05,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:05,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282771131] [2024-06-27 18:35:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:06,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:06,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282771131] [2024-06-27 18:35:06,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282771131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:06,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:06,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:06,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851611215] [2024-06-27 18:35:06,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:06,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:06,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 252 transitions, 2761 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:06,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:06,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:06,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:08,005 INFO L124 PetriNetUnfolderBase]: 6025/9589 cut-off events. [2024-06-27 18:35:08,006 INFO L125 PetriNetUnfolderBase]: For 298842/298854 co-relation queries the response was YES. [2024-06-27 18:35:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57623 conditions, 9589 events. 6025/9589 cut-off events. For 298842/298854 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 61405 event pairs, 1729 based on Foata normal form. 24/9350 useless extension candidates. Maximal degree in co-relation 57542. Up to 7491 conditions per place. [2024-06-27 18:35:08,305 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 216 selfloop transitions, 94 changer transitions 0/320 dead transitions. [2024-06-27 18:35:08,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 320 transitions, 3729 flow [2024-06-27 18:35:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:35:08,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-27 18:35:08,307 INFO L175 Difference]: Start difference. First operand has 183 places, 252 transitions, 2761 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:35:08,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 320 transitions, 3729 flow [2024-06-27 18:35:08,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 320 transitions, 3515 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:08,659 INFO L231 Difference]: Finished difference. Result has 186 places, 257 transitions, 2866 flow [2024-06-27 18:35:08,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2866, PETRI_PLACES=186, PETRI_TRANSITIONS=257} [2024-06-27 18:35:08,660 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-27 18:35:08,660 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 257 transitions, 2866 flow [2024-06-27 18:35:08,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:08,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:08,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:08,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:35:08,660 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:08,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:08,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1702280426, now seen corresponding path program 1 times [2024-06-27 18:35:08,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:08,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844724534] [2024-06-27 18:35:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:08,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844724534] [2024-06-27 18:35:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844724534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:09,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:09,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:09,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874262625] [2024-06-27 18:35:09,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:09,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:09,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:09,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:09,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:09,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 257 transitions, 2866 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:09,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:09,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:09,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:11,407 INFO L124 PetriNetUnfolderBase]: 6121/9729 cut-off events. [2024-06-27 18:35:11,408 INFO L125 PetriNetUnfolderBase]: For 309804/309816 co-relation queries the response was YES. [2024-06-27 18:35:11,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59015 conditions, 9729 events. 6121/9729 cut-off events. For 309804/309816 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 62359 event pairs, 1750 based on Foata normal form. 20/9490 useless extension candidates. Maximal degree in co-relation 58932. Up to 7479 conditions per place. [2024-06-27 18:35:11,517 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 213 selfloop transitions, 97 changer transitions 0/320 dead transitions. [2024-06-27 18:35:11,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 320 transitions, 3804 flow [2024-06-27 18:35:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:35:11,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-27 18:35:11,519 INFO L175 Difference]: Start difference. First operand has 186 places, 257 transitions, 2866 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:35:11,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 320 transitions, 3804 flow [2024-06-27 18:35:12,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 320 transitions, 3637 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 18:35:12,054 INFO L231 Difference]: Finished difference. Result has 190 places, 259 transitions, 2976 flow [2024-06-27 18:35:12,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2976, PETRI_PLACES=190, PETRI_TRANSITIONS=259} [2024-06-27 18:35:12,055 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 136 predicate places. [2024-06-27 18:35:12,055 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 259 transitions, 2976 flow [2024-06-27 18:35:12,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:12,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:12,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:12,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:35:12,056 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:12,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1403761952, now seen corresponding path program 1 times [2024-06-27 18:35:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:12,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074692295] [2024-06-27 18:35:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:12,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:12,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074692295] [2024-06-27 18:35:12,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074692295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:12,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:12,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:12,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817528475] [2024-06-27 18:35:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:12,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:12,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:12,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 259 transitions, 2976 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:12,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:12,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:12,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:14,123 INFO L124 PetriNetUnfolderBase]: 5988/9535 cut-off events. [2024-06-27 18:35:14,123 INFO L125 PetriNetUnfolderBase]: For 306030/306088 co-relation queries the response was YES. [2024-06-27 18:35:14,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57970 conditions, 9535 events. 5988/9535 cut-off events. For 306030/306088 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61265 event pairs, 2179 based on Foata normal form. 16/9266 useless extension candidates. Maximal degree in co-relation 57885. Up to 8496 conditions per place. [2024-06-27 18:35:14,227 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 244 selfloop transitions, 20 changer transitions 0/294 dead transitions. [2024-06-27 18:35:14,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 294 transitions, 3698 flow [2024-06-27 18:35:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:35:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:35:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:35:14,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:35:14,231 INFO L175 Difference]: Start difference. First operand has 190 places, 259 transitions, 2976 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:35:14,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 294 transitions, 3698 flow [2024-06-27 18:35:14,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 294 transitions, 3449 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:14,581 INFO L231 Difference]: Finished difference. Result has 190 places, 262 transitions, 2817 flow [2024-06-27 18:35:14,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2817, PETRI_PLACES=190, PETRI_TRANSITIONS=262} [2024-06-27 18:35:14,582 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 136 predicate places. [2024-06-27 18:35:14,582 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 262 transitions, 2817 flow [2024-06-27 18:35:14,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:14,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:14,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:35:14,583 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:14,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash -676730344, now seen corresponding path program 7 times [2024-06-27 18:35:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:14,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111915495] [2024-06-27 18:35:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:15,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111915495] [2024-06-27 18:35:15,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111915495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:15,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:15,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:15,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360634213] [2024-06-27 18:35:15,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:15,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:15,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:15,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:15,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 262 transitions, 2817 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:15,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:15,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:15,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:17,347 INFO L124 PetriNetUnfolderBase]: 6350/10066 cut-off events. [2024-06-27 18:35:17,347 INFO L125 PetriNetUnfolderBase]: For 342122/342164 co-relation queries the response was YES. [2024-06-27 18:35:17,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62061 conditions, 10066 events. 6350/10066 cut-off events. For 342122/342164 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 64681 event pairs, 1841 based on Foata normal form. 26/9810 useless extension candidates. Maximal degree in co-relation 61975. Up to 8328 conditions per place. [2024-06-27 18:35:17,473 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 215 selfloop transitions, 92 changer transitions 0/318 dead transitions. [2024-06-27 18:35:17,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 318 transitions, 3717 flow [2024-06-27 18:35:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 18:35:17,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-27 18:35:17,475 INFO L175 Difference]: Start difference. First operand has 190 places, 262 transitions, 2817 flow. Second operand 9 states and 223 transitions. [2024-06-27 18:35:17,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 318 transitions, 3717 flow [2024-06-27 18:35:17,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 318 transitions, 3651 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 18:35:17,875 INFO L231 Difference]: Finished difference. Result has 194 places, 264 transitions, 3023 flow [2024-06-27 18:35:17,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3023, PETRI_PLACES=194, PETRI_TRANSITIONS=264} [2024-06-27 18:35:17,876 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 140 predicate places. [2024-06-27 18:35:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 264 transitions, 3023 flow [2024-06-27 18:35:17,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:17,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:17,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:17,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:35:17,877 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:17,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:17,878 INFO L85 PathProgramCache]: Analyzing trace with hash 842906218, now seen corresponding path program 8 times [2024-06-27 18:35:17,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:17,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174768581] [2024-06-27 18:35:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:18,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174768581] [2024-06-27 18:35:18,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174768581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:18,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:18,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:18,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668564488] [2024-06-27 18:35:18,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:18,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:18,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:18,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:18,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 264 transitions, 3023 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:18,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:18,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:18,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:20,747 INFO L124 PetriNetUnfolderBase]: 6494/10275 cut-off events. [2024-06-27 18:35:20,748 INFO L125 PetriNetUnfolderBase]: For 375136/375162 co-relation queries the response was YES. [2024-06-27 18:35:20,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64993 conditions, 10275 events. 6494/10275 cut-off events. For 375136/375162 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 66068 event pairs, 1855 based on Foata normal form. 26/10026 useless extension candidates. Maximal degree in co-relation 64906. Up to 8548 conditions per place. [2024-06-27 18:35:20,863 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 224 selfloop transitions, 88 changer transitions 0/323 dead transitions. [2024-06-27 18:35:20,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 323 transitions, 3951 flow [2024-06-27 18:35:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 18:35:20,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:35:20,865 INFO L175 Difference]: Start difference. First operand has 194 places, 264 transitions, 3023 flow. Second operand 9 states and 225 transitions. [2024-06-27 18:35:20,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 323 transitions, 3951 flow [2024-06-27 18:35:21,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 323 transitions, 3717 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:21,448 INFO L231 Difference]: Finished difference. Result has 196 places, 266 transitions, 3057 flow [2024-06-27 18:35:21,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3057, PETRI_PLACES=196, PETRI_TRANSITIONS=266} [2024-06-27 18:35:21,449 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 142 predicate places. [2024-06-27 18:35:21,449 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 266 transitions, 3057 flow [2024-06-27 18:35:21,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:21,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:21,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:21,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:35:21,450 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:21,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash -216939454, now seen corresponding path program 9 times [2024-06-27 18:35:21,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:21,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085715425] [2024-06-27 18:35:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:21,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085715425] [2024-06-27 18:35:22,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085715425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:22,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:22,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:22,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530484926] [2024-06-27 18:35:22,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:22,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:22,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:22,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 266 transitions, 3057 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:22,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:22,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:22,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:24,405 INFO L124 PetriNetUnfolderBase]: 6648/10511 cut-off events. [2024-06-27 18:35:24,406 INFO L125 PetriNetUnfolderBase]: For 395721/395747 co-relation queries the response was YES. [2024-06-27 18:35:24,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66817 conditions, 10511 events. 6648/10511 cut-off events. For 395721/395747 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 67809 event pairs, 1898 based on Foata normal form. 26/10261 useless extension candidates. Maximal degree in co-relation 66729. Up to 8782 conditions per place. [2024-06-27 18:35:24,517 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 227 selfloop transitions, 87 changer transitions 0/325 dead transitions. [2024-06-27 18:35:24,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 325 transitions, 3993 flow [2024-06-27 18:35:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:35:24,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 18:35:24,518 INFO L175 Difference]: Start difference. First operand has 196 places, 266 transitions, 3057 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:35:24,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 325 transitions, 3993 flow [2024-06-27 18:35:25,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 325 transitions, 3763 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:25,004 INFO L231 Difference]: Finished difference. Result has 198 places, 268 transitions, 3097 flow [2024-06-27 18:35:25,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3097, PETRI_PLACES=198, PETRI_TRANSITIONS=268} [2024-06-27 18:35:25,004 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2024-06-27 18:35:25,004 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 268 transitions, 3097 flow [2024-06-27 18:35:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:25,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:25,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:35:25,005 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:25,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash 842758348, now seen corresponding path program 10 times [2024-06-27 18:35:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:25,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001827457] [2024-06-27 18:35:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:25,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:25,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:25,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001827457] [2024-06-27 18:35:25,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001827457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:25,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:25,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86780996] [2024-06-27 18:35:25,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:25,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:25,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:25,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 268 transitions, 3097 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:25,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:25,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:25,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:27,759 INFO L124 PetriNetUnfolderBase]: 6684/10569 cut-off events. [2024-06-27 18:35:27,759 INFO L125 PetriNetUnfolderBase]: For 393380/393406 co-relation queries the response was YES. [2024-06-27 18:35:27,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66701 conditions, 10569 events. 6684/10569 cut-off events. For 393380/393406 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68302 event pairs, 1856 based on Foata normal form. 22/10316 useless extension candidates. Maximal degree in co-relation 66612. Up to 8264 conditions per place. [2024-06-27 18:35:27,863 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 226 selfloop transitions, 96 changer transitions 0/333 dead transitions. [2024-06-27 18:35:27,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 333 transitions, 4115 flow [2024-06-27 18:35:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:35:27,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-27 18:35:27,864 INFO L175 Difference]: Start difference. First operand has 198 places, 268 transitions, 3097 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:35:27,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 333 transitions, 4115 flow [2024-06-27 18:35:28,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 333 transitions, 3883 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:28,417 INFO L231 Difference]: Finished difference. Result has 201 places, 273 transitions, 3224 flow [2024-06-27 18:35:28,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3224, PETRI_PLACES=201, PETRI_TRANSITIONS=273} [2024-06-27 18:35:28,417 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 147 predicate places. [2024-06-27 18:35:28,417 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 273 transitions, 3224 flow [2024-06-27 18:35:28,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:28,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:28,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:28,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:35:28,418 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:28,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:28,418 INFO L85 PathProgramCache]: Analyzing trace with hash -420014632, now seen corresponding path program 2 times [2024-06-27 18:35:28,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:28,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38410688] [2024-06-27 18:35:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:28,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38410688] [2024-06-27 18:35:29,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38410688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:29,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:29,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:35:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703536810] [2024-06-27 18:35:29,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:35:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:29,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:35:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:35:29,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:29,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 273 transitions, 3224 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:29,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:29,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:29,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:31,792 INFO L124 PetriNetUnfolderBase]: 6770/10717 cut-off events. [2024-06-27 18:35:31,792 INFO L125 PetriNetUnfolderBase]: For 402703/402727 co-relation queries the response was YES. [2024-06-27 18:35:31,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68016 conditions, 10717 events. 6770/10717 cut-off events. For 402703/402727 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 69408 event pairs, 1918 based on Foata normal form. 18/10462 useless extension candidates. Maximal degree in co-relation 67925. Up to 8832 conditions per place. [2024-06-27 18:35:31,931 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 224 selfloop transitions, 96 changer transitions 0/331 dead transitions. [2024-06-27 18:35:31,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 331 transitions, 4186 flow [2024-06-27 18:35:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 18:35:31,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:35:31,933 INFO L175 Difference]: Start difference. First operand has 201 places, 273 transitions, 3224 flow. Second operand 9 states and 225 transitions. [2024-06-27 18:35:31,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 331 transitions, 4186 flow [2024-06-27 18:35:32,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 331 transitions, 3989 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 18:35:32,656 INFO L231 Difference]: Finished difference. Result has 205 places, 275 transitions, 3322 flow [2024-06-27 18:35:32,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3322, PETRI_PLACES=205, PETRI_TRANSITIONS=275} [2024-06-27 18:35:32,657 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 151 predicate places. [2024-06-27 18:35:32,657 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 275 transitions, 3322 flow [2024-06-27 18:35:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:32,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:32,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:32,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:35:32,658 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:32,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash -410817862, now seen corresponding path program 3 times [2024-06-27 18:35:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:32,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481446423] [2024-06-27 18:35:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481446423] [2024-06-27 18:35:33,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481446423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:33,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:33,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:35:33,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291743948] [2024-06-27 18:35:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:35:33,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:35:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:35:33,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:33,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 275 transitions, 3322 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:33,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:33,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:33,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:35,973 INFO L124 PetriNetUnfolderBase]: 6876/10898 cut-off events. [2024-06-27 18:35:35,973 INFO L125 PetriNetUnfolderBase]: For 416834/416862 co-relation queries the response was YES. [2024-06-27 18:35:36,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69671 conditions, 10898 events. 6876/10898 cut-off events. For 416834/416862 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 71070 event pairs, 1749 based on Foata normal form. 18/10637 useless extension candidates. Maximal degree in co-relation 69578. Up to 7508 conditions per place. [2024-06-27 18:35:36,087 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 205 selfloop transitions, 120 changer transitions 0/336 dead transitions. [2024-06-27 18:35:36,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 336 transitions, 4492 flow [2024-06-27 18:35:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 18:35:36,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 18:35:36,089 INFO L175 Difference]: Start difference. First operand has 205 places, 275 transitions, 3322 flow. Second operand 9 states and 225 transitions. [2024-06-27 18:35:36,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 336 transitions, 4492 flow [2024-06-27 18:35:36,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 336 transitions, 4223 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 18:35:36,639 INFO L231 Difference]: Finished difference. Result has 207 places, 279 transitions, 3496 flow [2024-06-27 18:35:36,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=207, PETRI_TRANSITIONS=279} [2024-06-27 18:35:36,640 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 153 predicate places. [2024-06-27 18:35:36,640 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 279 transitions, 3496 flow [2024-06-27 18:35:36,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:36,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:36,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:36,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:35:36,641 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:36,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash 848483800, now seen corresponding path program 4 times [2024-06-27 18:35:36,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:36,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546136957] [2024-06-27 18:35:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:37,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546136957] [2024-06-27 18:35:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546136957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:37,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:37,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:35:37,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652182383] [2024-06-27 18:35:37,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:37,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:35:37,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:37,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:35:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:35:37,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:37,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 279 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:37,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:37,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:37,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:39,709 INFO L124 PetriNetUnfolderBase]: 6846/10860 cut-off events. [2024-06-27 18:35:39,710 INFO L125 PetriNetUnfolderBase]: For 412838/412866 co-relation queries the response was YES. [2024-06-27 18:35:39,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68933 conditions, 10860 events. 6846/10860 cut-off events. For 412838/412866 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 70760 event pairs, 1928 based on Foata normal form. 18/10599 useless extension candidates. Maximal degree in co-relation 68839. Up to 8750 conditions per place. [2024-06-27 18:35:39,855 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 233 selfloop transitions, 93 changer transitions 0/337 dead transitions. [2024-06-27 18:35:39,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 337 transitions, 4308 flow [2024-06-27 18:35:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:35:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:35:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:35:39,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 18:35:39,857 INFO L175 Difference]: Start difference. First operand has 207 places, 279 transitions, 3496 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:35:39,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 337 transitions, 4308 flow [2024-06-27 18:35:40,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 337 transitions, 4095 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 18:35:40,922 INFO L231 Difference]: Finished difference. Result has 210 places, 278 transitions, 3390 flow [2024-06-27 18:35:40,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3390, PETRI_PLACES=210, PETRI_TRANSITIONS=278} [2024-06-27 18:35:40,923 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 156 predicate places. [2024-06-27 18:35:40,923 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 278 transitions, 3390 flow [2024-06-27 18:35:40,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:40,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:40,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:40,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:35:40,924 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:40,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:40,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1642573296, now seen corresponding path program 2 times [2024-06-27 18:35:40,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:40,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727239081] [2024-06-27 18:35:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:40,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:41,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:41,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727239081] [2024-06-27 18:35:41,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727239081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:41,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:41,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:41,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066851585] [2024-06-27 18:35:41,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:41,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:41,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:41,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 278 transitions, 3390 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:41,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:41,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:41,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:43,449 INFO L124 PetriNetUnfolderBase]: 6632/10551 cut-off events. [2024-06-27 18:35:43,449 INFO L125 PetriNetUnfolderBase]: For 392902/392949 co-relation queries the response was YES. [2024-06-27 18:35:43,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66864 conditions, 10551 events. 6632/10551 cut-off events. For 392902/392949 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 69067 event pairs, 2322 based on Foata normal form. 19/10261 useless extension candidates. Maximal degree in co-relation 66768. Up to 9410 conditions per place. [2024-06-27 18:35:43,564 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 252 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2024-06-27 18:35:43,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 314 transitions, 4356 flow [2024-06-27 18:35:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:35:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:35:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:35:43,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:35:43,565 INFO L175 Difference]: Start difference. First operand has 210 places, 278 transitions, 3390 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:35:43,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 314 transitions, 4356 flow [2024-06-27 18:35:44,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 314 transitions, 4072 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 18:35:44,060 INFO L231 Difference]: Finished difference. Result has 209 places, 284 transitions, 3270 flow [2024-06-27 18:35:44,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3270, PETRI_PLACES=209, PETRI_TRANSITIONS=284} [2024-06-27 18:35:44,060 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 155 predicate places. [2024-06-27 18:35:44,061 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 284 transitions, 3270 flow [2024-06-27 18:35:44,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:44,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:44,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:44,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:35:44,061 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:44,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1646290348, now seen corresponding path program 3 times [2024-06-27 18:35:44,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:44,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199025866] [2024-06-27 18:35:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:44,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:44,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:44,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199025866] [2024-06-27 18:35:44,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199025866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:44,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:44,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33272134] [2024-06-27 18:35:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:44,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:44,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:44,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 284 transitions, 3270 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:44,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:44,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:44,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:46,508 INFO L124 PetriNetUnfolderBase]: 6625/10527 cut-off events. [2024-06-27 18:35:46,509 INFO L125 PetriNetUnfolderBase]: For 395500/395566 co-relation queries the response was YES. [2024-06-27 18:35:46,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66709 conditions, 10527 events. 6625/10527 cut-off events. For 395500/395566 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 68789 event pairs, 2317 based on Foata normal form. 26/10230 useless extension candidates. Maximal degree in co-relation 66612. Up to 9405 conditions per place. [2024-06-27 18:35:46,633 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 250 selfloop transitions, 33 changer transitions 0/313 dead transitions. [2024-06-27 18:35:46,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 313 transitions, 4044 flow [2024-06-27 18:35:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:35:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:35:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 18:35:46,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 18:35:46,634 INFO L175 Difference]: Start difference. First operand has 209 places, 284 transitions, 3270 flow. Second operand 7 states and 159 transitions. [2024-06-27 18:35:46,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 313 transitions, 4044 flow [2024-06-27 18:35:47,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 313 transitions, 3948 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 18:35:47,212 INFO L231 Difference]: Finished difference. Result has 213 places, 284 transitions, 3246 flow [2024-06-27 18:35:47,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3246, PETRI_PLACES=213, PETRI_TRANSITIONS=284} [2024-06-27 18:35:47,213 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 159 predicate places. [2024-06-27 18:35:47,213 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 284 transitions, 3246 flow [2024-06-27 18:35:47,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:47,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:47,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:35:47,214 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:47,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1820563981, now seen corresponding path program 1 times [2024-06-27 18:35:47,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353115121] [2024-06-27 18:35:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:47,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:47,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353115121] [2024-06-27 18:35:47,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353115121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:47,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:47,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806740894] [2024-06-27 18:35:47,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:47,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:47,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:47,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:35:47,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 284 transitions, 3246 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:47,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:47,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:35:47,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:49,561 INFO L124 PetriNetUnfolderBase]: 6306/10160 cut-off events. [2024-06-27 18:35:49,561 INFO L125 PetriNetUnfolderBase]: For 356634/356720 co-relation queries the response was YES. [2024-06-27 18:35:49,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63676 conditions, 10160 events. 6306/10160 cut-off events. For 356634/356720 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 67122 event pairs, 1960 based on Foata normal form. 10/9886 useless extension candidates. Maximal degree in co-relation 63577. Up to 9017 conditions per place. [2024-06-27 18:35:49,696 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 278 selfloop transitions, 29 changer transitions 0/321 dead transitions. [2024-06-27 18:35:49,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 321 transitions, 4070 flow [2024-06-27 18:35:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:35:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:35:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:35:49,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 18:35:49,698 INFO L175 Difference]: Start difference. First operand has 213 places, 284 transitions, 3246 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:35:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 321 transitions, 4070 flow [2024-06-27 18:35:50,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 321 transitions, 3996 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:35:50,165 INFO L231 Difference]: Finished difference. Result has 215 places, 293 transitions, 3374 flow [2024-06-27 18:35:50,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3172, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3374, PETRI_PLACES=215, PETRI_TRANSITIONS=293} [2024-06-27 18:35:50,166 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 161 predicate places. [2024-06-27 18:35:50,166 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 293 transitions, 3374 flow [2024-06-27 18:35:50,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:50,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:50,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:50,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:35:50,166 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:50,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1820443081, now seen corresponding path program 2 times [2024-06-27 18:35:50,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:50,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450291793] [2024-06-27 18:35:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:50,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:50,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450291793] [2024-06-27 18:35:50,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450291793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:50,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:50,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:50,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984108458] [2024-06-27 18:35:50,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:50,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:50,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:50,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:35:50,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 293 transitions, 3374 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:50,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:50,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:35:50,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:52,585 INFO L124 PetriNetUnfolderBase]: 6352/10250 cut-off events. [2024-06-27 18:35:52,585 INFO L125 PetriNetUnfolderBase]: For 378336/378410 co-relation queries the response was YES. [2024-06-27 18:35:52,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66261 conditions, 10250 events. 6352/10250 cut-off events. For 378336/378410 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68183 event pairs, 2797 based on Foata normal form. 10/9986 useless extension candidates. Maximal degree in co-relation 66160. Up to 9038 conditions per place. [2024-06-27 18:35:52,723 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 281 selfloop transitions, 39 changer transitions 0/334 dead transitions. [2024-06-27 18:35:52,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 334 transitions, 4455 flow [2024-06-27 18:35:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:35:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:35:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 18:35:52,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 18:35:52,724 INFO L175 Difference]: Start difference. First operand has 215 places, 293 transitions, 3374 flow. Second operand 8 states and 183 transitions. [2024-06-27 18:35:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 334 transitions, 4455 flow [2024-06-27 18:35:53,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 334 transitions, 4344 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 18:35:53,482 INFO L231 Difference]: Finished difference. Result has 222 places, 307 transitions, 3619 flow [2024-06-27 18:35:53,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3619, PETRI_PLACES=222, PETRI_TRANSITIONS=307} [2024-06-27 18:35:53,483 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-27 18:35:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 307 transitions, 3619 flow [2024-06-27 18:35:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:53,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:53,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:53,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:35:53,484 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1653902956, now seen corresponding path program 1 times [2024-06-27 18:35:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124933698] [2024-06-27 18:35:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124933698] [2024-06-27 18:35:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124933698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:54,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:54,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:54,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759497782] [2024-06-27 18:35:54,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:54,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:54,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:54,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:54,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 307 transitions, 3619 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:54,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:54,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:54,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:56,065 INFO L124 PetriNetUnfolderBase]: 6633/10551 cut-off events. [2024-06-27 18:35:56,065 INFO L125 PetriNetUnfolderBase]: For 398798/398798 co-relation queries the response was YES. [2024-06-27 18:35:56,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69463 conditions, 10551 events. 6633/10551 cut-off events. For 398798/398798 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 68720 event pairs, 3009 based on Foata normal form. 1/10346 useless extension candidates. Maximal degree in co-relation 69359. Up to 9579 conditions per place. [2024-06-27 18:35:56,200 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 307 selfloop transitions, 20 changer transitions 0/336 dead transitions. [2024-06-27 18:35:56,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 336 transitions, 4494 flow [2024-06-27 18:35:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:35:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:35:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 18:35:56,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 18:35:56,201 INFO L175 Difference]: Start difference. First operand has 222 places, 307 transitions, 3619 flow. Second operand 7 states and 157 transitions. [2024-06-27 18:35:56,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 336 transitions, 4494 flow [2024-06-27 18:35:56,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 4353 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 18:35:56,935 INFO L231 Difference]: Finished difference. Result has 226 places, 310 transitions, 3597 flow [2024-06-27 18:35:56,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3597, PETRI_PLACES=226, PETRI_TRANSITIONS=310} [2024-06-27 18:35:56,936 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 172 predicate places. [2024-06-27 18:35:56,936 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 310 transitions, 3597 flow [2024-06-27 18:35:56,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:35:56,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:35:56,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:35:56,936 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:35:56,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:35:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1642121874, now seen corresponding path program 2 times [2024-06-27 18:35:56,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:35:56,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231238462] [2024-06-27 18:35:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:35:56,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:35:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:35:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:35:57,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:35:57,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231238462] [2024-06-27 18:35:57,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231238462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:35:57,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:35:57,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:35:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036208486] [2024-06-27 18:35:57,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:35:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:35:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:35:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:35:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:35:57,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:35:57,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 310 transitions, 3597 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:35:57,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:35:57,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:35:57,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:35:59,334 INFO L124 PetriNetUnfolderBase]: 6661/10665 cut-off events. [2024-06-27 18:35:59,334 INFO L125 PetriNetUnfolderBase]: For 411752/411760 co-relation queries the response was YES. [2024-06-27 18:35:59,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70674 conditions, 10665 events. 6661/10665 cut-off events. For 411752/411760 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 69941 event pairs, 2982 based on Foata normal form. 9/10442 useless extension candidates. Maximal degree in co-relation 70568. Up to 9554 conditions per place. [2024-06-27 18:35:59,480 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 302 selfloop transitions, 33 changer transitions 0/344 dead transitions. [2024-06-27 18:35:59,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 344 transitions, 4740 flow [2024-06-27 18:35:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:35:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:35:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 18:35:59,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 18:35:59,481 INFO L175 Difference]: Start difference. First operand has 226 places, 310 transitions, 3597 flow. Second operand 7 states and 160 transitions. [2024-06-27 18:35:59,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 344 transitions, 4740 flow [2024-06-27 18:36:00,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 344 transitions, 4663 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:36:00,127 INFO L231 Difference]: Finished difference. Result has 228 places, 316 transitions, 3718 flow [2024-06-27 18:36:00,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3718, PETRI_PLACES=228, PETRI_TRANSITIONS=316} [2024-06-27 18:36:00,127 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 174 predicate places. [2024-06-27 18:36:00,127 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 316 transitions, 3718 flow [2024-06-27 18:36:00,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:00,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:00,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:00,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:36:00,128 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:00,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1642388784, now seen corresponding path program 3 times [2024-06-27 18:36:00,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:00,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485441758] [2024-06-27 18:36:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:00,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:00,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:00,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485441758] [2024-06-27 18:36:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485441758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:00,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:00,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:00,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724170619] [2024-06-27 18:36:00,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:00,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:00,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:00,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:00,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 316 transitions, 3718 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:00,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:00,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:00,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:02,537 INFO L124 PetriNetUnfolderBase]: 6658/10662 cut-off events. [2024-06-27 18:36:02,538 INFO L125 PetriNetUnfolderBase]: For 425199/425207 co-relation queries the response was YES. [2024-06-27 18:36:02,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71451 conditions, 10662 events. 6658/10662 cut-off events. For 425199/425207 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 69854 event pairs, 2980 based on Foata normal form. 9/10439 useless extension candidates. Maximal degree in co-relation 71344. Up to 9551 conditions per place. [2024-06-27 18:36:02,688 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 303 selfloop transitions, 31 changer transitions 0/343 dead transitions. [2024-06-27 18:36:02,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 343 transitions, 4627 flow [2024-06-27 18:36:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 18:36:02,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 18:36:02,689 INFO L175 Difference]: Start difference. First operand has 228 places, 316 transitions, 3718 flow. Second operand 7 states and 160 transitions. [2024-06-27 18:36:02,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 343 transitions, 4627 flow [2024-06-27 18:36:03,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 343 transitions, 4519 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 18:36:03,434 INFO L231 Difference]: Finished difference. Result has 232 places, 316 transitions, 3678 flow [2024-06-27 18:36:03,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=232, PETRI_TRANSITIONS=316} [2024-06-27 18:36:03,434 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 178 predicate places. [2024-06-27 18:36:03,434 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 316 transitions, 3678 flow [2024-06-27 18:36:03,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:03,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:03,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:03,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:36:03,435 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:03,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:03,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1642389001, now seen corresponding path program 3 times [2024-06-27 18:36:03,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:03,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245791489] [2024-06-27 18:36:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:03,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:04,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:04,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245791489] [2024-06-27 18:36:04,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245791489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:04,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:04,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702244062] [2024-06-27 18:36:04,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:04,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:04,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:36:04,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 316 transitions, 3678 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:04,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:04,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:36:04,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:06,004 INFO L124 PetriNetUnfolderBase]: 6410/10410 cut-off events. [2024-06-27 18:36:06,004 INFO L125 PetriNetUnfolderBase]: For 429249/429392 co-relation queries the response was YES. [2024-06-27 18:36:06,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69965 conditions, 10410 events. 6410/10410 cut-off events. For 429249/429392 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 69679 event pairs, 2762 based on Foata normal form. 10/10113 useless extension candidates. Maximal degree in co-relation 69856. Up to 9052 conditions per place. [2024-06-27 18:36:06,132 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 290 selfloop transitions, 52 changer transitions 0/359 dead transitions. [2024-06-27 18:36:06,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 359 transitions, 4949 flow [2024-06-27 18:36:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:36:06,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:36:06,133 INFO L175 Difference]: Start difference. First operand has 232 places, 316 transitions, 3678 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:36:06,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 359 transitions, 4949 flow [2024-06-27 18:36:06,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 359 transitions, 4855 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:36:06,889 INFO L231 Difference]: Finished difference. Result has 235 places, 334 transitions, 4127 flow [2024-06-27 18:36:06,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4127, PETRI_PLACES=235, PETRI_TRANSITIONS=334} [2024-06-27 18:36:06,889 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 181 predicate places. [2024-06-27 18:36:06,889 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 334 transitions, 4127 flow [2024-06-27 18:36:06,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:06,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:06,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:06,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:36:06,890 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:06,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:06,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1121810922, now seen corresponding path program 1 times [2024-06-27 18:36:06,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:06,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994607887] [2024-06-27 18:36:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:07,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994607887] [2024-06-27 18:36:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994607887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:07,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459758665] [2024-06-27 18:36:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:07,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:07,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 334 transitions, 4127 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:07,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:07,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:07,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:09,565 INFO L124 PetriNetUnfolderBase]: 7057/11243 cut-off events. [2024-06-27 18:36:09,565 INFO L125 PetriNetUnfolderBase]: For 527261/527421 co-relation queries the response was YES. [2024-06-27 18:36:09,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78960 conditions, 11243 events. 7057/11243 cut-off events. For 527261/527421 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 73925 event pairs, 2793 based on Foata normal form. 15/10944 useless extension candidates. Maximal degree in co-relation 78848. Up to 10008 conditions per place. [2024-06-27 18:36:09,735 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 335 selfloop transitions, 41 changer transitions 0/392 dead transitions. [2024-06-27 18:36:09,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 392 transitions, 5410 flow [2024-06-27 18:36:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:36:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:36:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 18:36:09,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869791666666667 [2024-06-27 18:36:09,736 INFO L175 Difference]: Start difference. First operand has 235 places, 334 transitions, 4127 flow. Second operand 8 states and 187 transitions. [2024-06-27 18:36:09,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 392 transitions, 5410 flow [2024-06-27 18:36:10,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 392 transitions, 5189 flow, removed 100 selfloop flow, removed 2 redundant places. [2024-06-27 18:36:10,925 INFO L231 Difference]: Finished difference. Result has 244 places, 360 transitions, 4472 flow [2024-06-27 18:36:10,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4472, PETRI_PLACES=244, PETRI_TRANSITIONS=360} [2024-06-27 18:36:10,926 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 190 predicate places. [2024-06-27 18:36:10,926 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 360 transitions, 4472 flow [2024-06-27 18:36:10,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:10,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:10,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:36:10,927 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:10,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash 57385106, now seen corresponding path program 2 times [2024-06-27 18:36:10,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:10,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403445910] [2024-06-27 18:36:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:11,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:11,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403445910] [2024-06-27 18:36:11,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403445910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:11,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:11,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:11,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670829022] [2024-06-27 18:36:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:11,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:11,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 360 transitions, 4472 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:11,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:11,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:13,539 INFO L124 PetriNetUnfolderBase]: 7118/11328 cut-off events. [2024-06-27 18:36:13,539 INFO L125 PetriNetUnfolderBase]: For 548699/548853 co-relation queries the response was YES. [2024-06-27 18:36:13,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81160 conditions, 11328 events. 7118/11328 cut-off events. For 548699/548853 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 74450 event pairs, 2796 based on Foata normal form. 15/11030 useless extension candidates. Maximal degree in co-relation 81043. Up to 10052 conditions per place. [2024-06-27 18:36:13,708 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 338 selfloop transitions, 48 changer transitions 0/402 dead transitions. [2024-06-27 18:36:13,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 402 transitions, 5701 flow [2024-06-27 18:36:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:36:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:36:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 18:36:13,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-27 18:36:13,710 INFO L175 Difference]: Start difference. First operand has 244 places, 360 transitions, 4472 flow. Second operand 8 states and 188 transitions. [2024-06-27 18:36:13,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 402 transitions, 5701 flow [2024-06-27 18:36:14,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 402 transitions, 5622 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 18:36:14,999 INFO L231 Difference]: Finished difference. Result has 251 places, 368 transitions, 4660 flow [2024-06-27 18:36:14,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4660, PETRI_PLACES=251, PETRI_TRANSITIONS=368} [2024-06-27 18:36:14,999 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 197 predicate places. [2024-06-27 18:36:15,000 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 368 transitions, 4660 flow [2024-06-27 18:36:15,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:15,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:15,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:15,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:36:15,000 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:15,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash 57394034, now seen corresponding path program 1 times [2024-06-27 18:36:15,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:15,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964984790] [2024-06-27 18:36:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:15,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:15,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964984790] [2024-06-27 18:36:15,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964984790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:15,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:15,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:36:15,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742764145] [2024-06-27 18:36:15,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:15,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:36:15,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:15,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:36:15,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:36:15,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:15,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 368 transitions, 4660 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:15,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:15,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:15,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:17,792 INFO L124 PetriNetUnfolderBase]: 6986/11133 cut-off events. [2024-06-27 18:36:17,792 INFO L125 PetriNetUnfolderBase]: For 558529/558574 co-relation queries the response was YES. [2024-06-27 18:36:17,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80887 conditions, 11133 events. 6986/11133 cut-off events. For 558529/558574 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 72931 event pairs, 2483 based on Foata normal form. 7/10800 useless extension candidates. Maximal degree in co-relation 80767. Up to 9839 conditions per place. [2024-06-27 18:36:17,951 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 347 selfloop transitions, 38 changer transitions 0/425 dead transitions. [2024-06-27 18:36:17,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 425 transitions, 5877 flow [2024-06-27 18:36:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:36:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:36:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 18:36:17,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 18:36:17,953 INFO L175 Difference]: Start difference. First operand has 251 places, 368 transitions, 4660 flow. Second operand 9 states and 204 transitions. [2024-06-27 18:36:17,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 425 transitions, 5877 flow [2024-06-27 18:36:19,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 425 transitions, 5771 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 18:36:19,119 INFO L231 Difference]: Finished difference. Result has 259 places, 386 transitions, 4878 flow [2024-06-27 18:36:19,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4878, PETRI_PLACES=259, PETRI_TRANSITIONS=386} [2024-06-27 18:36:19,119 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 205 predicate places. [2024-06-27 18:36:19,119 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 386 transitions, 4878 flow [2024-06-27 18:36:19,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:19,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:19,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:19,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:36:19,120 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:19,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1548763024, now seen corresponding path program 3 times [2024-06-27 18:36:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:19,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375716647] [2024-06-27 18:36:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375716647] [2024-06-27 18:36:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375716647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:19,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:19,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319840022] [2024-06-27 18:36:19,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:19,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:19,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:19,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 386 transitions, 4878 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:19,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:19,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:19,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:22,171 INFO L124 PetriNetUnfolderBase]: 7248/11537 cut-off events. [2024-06-27 18:36:22,171 INFO L125 PetriNetUnfolderBase]: For 587739/587924 co-relation queries the response was YES. [2024-06-27 18:36:22,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85887 conditions, 11537 events. 7248/11537 cut-off events. For 587739/587924 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 76050 event pairs, 2722 based on Foata normal form. 40/11260 useless extension candidates. Maximal degree in co-relation 85762. Up to 10241 conditions per place. [2024-06-27 18:36:22,326 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 360 selfloop transitions, 47 changer transitions 0/424 dead transitions. [2024-06-27 18:36:22,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 424 transitions, 6011 flow [2024-06-27 18:36:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:36:22,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 18:36:22,327 INFO L175 Difference]: Start difference. First operand has 259 places, 386 transitions, 4878 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:36:22,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 424 transitions, 6011 flow [2024-06-27 18:36:23,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 424 transitions, 5921 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 18:36:23,653 INFO L231 Difference]: Finished difference. Result has 262 places, 394 transitions, 5057 flow [2024-06-27 18:36:23,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5057, PETRI_PLACES=262, PETRI_TRANSITIONS=394} [2024-06-27 18:36:23,653 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 208 predicate places. [2024-06-27 18:36:23,653 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 394 transitions, 5057 flow [2024-06-27 18:36:23,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:23,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:23,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:36:23,654 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1800991450, now seen corresponding path program 4 times [2024-06-27 18:36:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:23,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343559062] [2024-06-27 18:36:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343559062] [2024-06-27 18:36:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343559062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:24,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830165203] [2024-06-27 18:36:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:24,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:24,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 394 transitions, 5057 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:24,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:24,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:24,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:26,534 INFO L124 PetriNetUnfolderBase]: 7291/11596 cut-off events. [2024-06-27 18:36:26,535 INFO L125 PetriNetUnfolderBase]: For 609718/609903 co-relation queries the response was YES. [2024-06-27 18:36:26,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87645 conditions, 11596 events. 7291/11596 cut-off events. For 609718/609903 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76449 event pairs, 2719 based on Foata normal form. 39/11317 useless extension candidates. Maximal degree in co-relation 87519. Up to 10231 conditions per place. [2024-06-27 18:36:27,051 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 353 selfloop transitions, 61 changer transitions 0/431 dead transitions. [2024-06-27 18:36:27,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 431 transitions, 6378 flow [2024-06-27 18:36:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 18:36:27,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 18:36:27,052 INFO L175 Difference]: Start difference. First operand has 262 places, 394 transitions, 5057 flow. Second operand 7 states and 164 transitions. [2024-06-27 18:36:27,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 431 transitions, 6378 flow [2024-06-27 18:36:28,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 431 transitions, 6235 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 18:36:28,300 INFO L231 Difference]: Finished difference. Result has 267 places, 402 transitions, 5259 flow [2024-06-27 18:36:28,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5259, PETRI_PLACES=267, PETRI_TRANSITIONS=402} [2024-06-27 18:36:28,301 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 213 predicate places. [2024-06-27 18:36:28,302 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 402 transitions, 5259 flow [2024-06-27 18:36:28,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:28,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:28,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:36:28,302 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:28,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1800982522, now seen corresponding path program 2 times [2024-06-27 18:36:28,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:28,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822786145] [2024-06-27 18:36:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:28,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822786145] [2024-06-27 18:36:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822786145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:36:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974687721] [2024-06-27 18:36:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:36:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:36:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:36:29,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:29,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 402 transitions, 5259 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:29,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:31,580 INFO L124 PetriNetUnfolderBase]: 7088/11285 cut-off events. [2024-06-27 18:36:31,580 INFO L125 PetriNetUnfolderBase]: For 602594/602653 co-relation queries the response was YES. [2024-06-27 18:36:31,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85212 conditions, 11285 events. 7088/11285 cut-off events. For 602594/602653 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 74146 event pairs, 2247 based on Foata normal form. 8/10945 useless extension candidates. Maximal degree in co-relation 85084. Up to 9879 conditions per place. [2024-06-27 18:36:31,755 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 352 selfloop transitions, 43 changer transitions 0/439 dead transitions. [2024-06-27 18:36:31,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 439 transitions, 6361 flow [2024-06-27 18:36:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:36:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:36:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 18:36:31,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2024-06-27 18:36:31,756 INFO L175 Difference]: Start difference. First operand has 267 places, 402 transitions, 5259 flow. Second operand 8 states and 181 transitions. [2024-06-27 18:36:31,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 439 transitions, 6361 flow [2024-06-27 18:36:32,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 439 transitions, 6245 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 18:36:32,983 INFO L231 Difference]: Finished difference. Result has 271 places, 405 transitions, 5297 flow [2024-06-27 18:36:32,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5143, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5297, PETRI_PLACES=271, PETRI_TRANSITIONS=405} [2024-06-27 18:36:32,983 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 217 predicate places. [2024-06-27 18:36:32,983 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 405 transitions, 5297 flow [2024-06-27 18:36:32,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:32,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:32,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:36:32,984 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:32,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -610625306, now seen corresponding path program 5 times [2024-06-27 18:36:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:32,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754476057] [2024-06-27 18:36:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:32,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:33,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:33,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754476057] [2024-06-27 18:36:33,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754476057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:33,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:33,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652484535] [2024-06-27 18:36:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:33,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:33,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:33,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 405 transitions, 5297 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:33,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:33,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:33,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:35,881 INFO L124 PetriNetUnfolderBase]: 7312/11627 cut-off events. [2024-06-27 18:36:35,882 INFO L125 PetriNetUnfolderBase]: For 605986/606199 co-relation queries the response was YES. [2024-06-27 18:36:36,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88162 conditions, 11627 events. 7312/11627 cut-off events. For 605986/606199 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76489 event pairs, 2726 based on Foata normal form. 68/11375 useless extension candidates. Maximal degree in co-relation 88033. Up to 10336 conditions per place. [2024-06-27 18:36:36,082 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 374 selfloop transitions, 43 changer transitions 0/434 dead transitions. [2024-06-27 18:36:36,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 434 transitions, 6328 flow [2024-06-27 18:36:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 18:36:36,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 18:36:36,084 INFO L175 Difference]: Start difference. First operand has 271 places, 405 transitions, 5297 flow. Second operand 7 states and 160 transitions. [2024-06-27 18:36:36,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 434 transitions, 6328 flow [2024-06-27 18:36:37,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 434 transitions, 6160 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 18:36:37,524 INFO L231 Difference]: Finished difference. Result has 272 places, 407 transitions, 5268 flow [2024-06-27 18:36:37,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5268, PETRI_PLACES=272, PETRI_TRANSITIONS=407} [2024-06-27 18:36:37,525 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 218 predicate places. [2024-06-27 18:36:37,525 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 407 transitions, 5268 flow [2024-06-27 18:36:37,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:37,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:37,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:36:37,525 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:37,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -730778180, now seen corresponding path program 6 times [2024-06-27 18:36:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297508188] [2024-06-27 18:36:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:38,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:38,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297508188] [2024-06-27 18:36:38,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297508188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:38,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:38,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:38,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550523889] [2024-06-27 18:36:38,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:38,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:38,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:38,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 407 transitions, 5268 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:38,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:38,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:40,515 INFO L124 PetriNetUnfolderBase]: 7332/11656 cut-off events. [2024-06-27 18:36:40,516 INFO L125 PetriNetUnfolderBase]: For 596605/596818 co-relation queries the response was YES. [2024-06-27 18:36:40,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87025 conditions, 11656 events. 7332/11656 cut-off events. For 596605/596818 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 76733 event pairs, 2724 based on Foata normal form. 67/11402 useless extension candidates. Maximal degree in co-relation 86895. Up to 10310 conditions per place. [2024-06-27 18:36:40,689 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 360 selfloop transitions, 60 changer transitions 0/437 dead transitions. [2024-06-27 18:36:40,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 437 transitions, 6400 flow [2024-06-27 18:36:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 18:36:40,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 18:36:40,690 INFO L175 Difference]: Start difference. First operand has 272 places, 407 transitions, 5268 flow. Second operand 7 states and 160 transitions. [2024-06-27 18:36:40,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 437 transitions, 6400 flow [2024-06-27 18:36:42,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 437 transitions, 6323 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 18:36:42,256 INFO L231 Difference]: Finished difference. Result has 276 places, 410 transitions, 5396 flow [2024-06-27 18:36:42,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5396, PETRI_PLACES=276, PETRI_TRANSITIONS=410} [2024-06-27 18:36:42,257 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 222 predicate places. [2024-06-27 18:36:42,257 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 410 transitions, 5396 flow [2024-06-27 18:36:42,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:42,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:42,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:42,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:36:42,258 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:42,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash -590156442, now seen corresponding path program 7 times [2024-06-27 18:36:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:42,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819425398] [2024-06-27 18:36:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:42,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:42,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819425398] [2024-06-27 18:36:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819425398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:42,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:42,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830506055] [2024-06-27 18:36:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:42,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:42,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:42,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 410 transitions, 5396 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:42,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:42,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:42,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:45,459 INFO L124 PetriNetUnfolderBase]: 7354/11720 cut-off events. [2024-06-27 18:36:45,459 INFO L125 PetriNetUnfolderBase]: For 620181/620400 co-relation queries the response was YES. [2024-06-27 18:36:45,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88577 conditions, 11720 events. 7354/11720 cut-off events. For 620181/620400 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 77545 event pairs, 2706 based on Foata normal form. 66/11453 useless extension candidates. Maximal degree in co-relation 88445. Up to 10233 conditions per place. [2024-06-27 18:36:45,603 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 346 selfloop transitions, 86 changer transitions 0/449 dead transitions. [2024-06-27 18:36:45,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 449 transitions, 6879 flow [2024-06-27 18:36:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:36:45,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 18:36:45,604 INFO L175 Difference]: Start difference. First operand has 276 places, 410 transitions, 5396 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:36:45,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 449 transitions, 6879 flow [2024-06-27 18:36:46,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 449 transitions, 6714 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 18:36:46,832 INFO L231 Difference]: Finished difference. Result has 279 places, 419 transitions, 5651 flow [2024-06-27 18:36:46,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5651, PETRI_PLACES=279, PETRI_TRANSITIONS=419} [2024-06-27 18:36:46,832 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 225 predicate places. [2024-06-27 18:36:46,832 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 419 transitions, 5651 flow [2024-06-27 18:36:46,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:46,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:46,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:46,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:36:46,833 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:46,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -254737472, now seen corresponding path program 8 times [2024-06-27 18:36:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747283473] [2024-06-27 18:36:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:47,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747283473] [2024-06-27 18:36:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747283473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:47,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:47,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:36:47,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494066148] [2024-06-27 18:36:47,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:47,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:36:47,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:36:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:36:47,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:47,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 419 transitions, 5651 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:47,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:47,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:47,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:49,743 INFO L124 PetriNetUnfolderBase]: 7351/11722 cut-off events. [2024-06-27 18:36:49,743 INFO L125 PetriNetUnfolderBase]: For 638787/639006 co-relation queries the response was YES. [2024-06-27 18:36:49,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89723 conditions, 11722 events. 7351/11722 cut-off events. For 638787/639006 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 77682 event pairs, 2711 based on Foata normal form. 66/11453 useless extension candidates. Maximal degree in co-relation 89589. Up to 10230 conditions per place. [2024-06-27 18:36:49,910 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 345 selfloop transitions, 86 changer transitions 0/448 dead transitions. [2024-06-27 18:36:49,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 448 transitions, 6817 flow [2024-06-27 18:36:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:36:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:36:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:36:49,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:36:49,912 INFO L175 Difference]: Start difference. First operand has 279 places, 419 transitions, 5651 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:36:49,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 448 transitions, 6817 flow [2024-06-27 18:36:51,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 448 transitions, 6677 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-27 18:36:51,281 INFO L231 Difference]: Finished difference. Result has 284 places, 419 transitions, 5689 flow [2024-06-27 18:36:51,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5689, PETRI_PLACES=284, PETRI_TRANSITIONS=419} [2024-06-27 18:36:51,282 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 230 predicate places. [2024-06-27 18:36:51,282 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 419 transitions, 5689 flow [2024-06-27 18:36:51,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:51,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:51,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:36:51,283 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:51,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash 490798304, now seen corresponding path program 3 times [2024-06-27 18:36:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:51,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722487885] [2024-06-27 18:36:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722487885] [2024-06-27 18:36:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722487885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:52,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:52,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:36:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658886266] [2024-06-27 18:36:52,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:52,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:36:52,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:36:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:36:52,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 419 transitions, 5689 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:52,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:54,308 INFO L124 PetriNetUnfolderBase]: 7169/11423 cut-off events. [2024-06-27 18:36:54,308 INFO L125 PetriNetUnfolderBase]: For 631674/631758 co-relation queries the response was YES. [2024-06-27 18:36:54,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86883 conditions, 11423 events. 7169/11423 cut-off events. For 631674/631758 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 75168 event pairs, 2244 based on Foata normal form. 27/11097 useless extension candidates. Maximal degree in co-relation 86747. Up to 9862 conditions per place. [2024-06-27 18:36:54,498 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 352 selfloop transitions, 60 changer transitions 0/462 dead transitions. [2024-06-27 18:36:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 462 transitions, 7096 flow [2024-06-27 18:36:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:36:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:36:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 18:36:54,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:36:54,499 INFO L175 Difference]: Start difference. First operand has 284 places, 419 transitions, 5689 flow. Second operand 8 states and 184 transitions. [2024-06-27 18:36:54,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 462 transitions, 7096 flow [2024-06-27 18:36:56,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 462 transitions, 6855 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:36:56,016 INFO L231 Difference]: Finished difference. Result has 287 places, 428 transitions, 5732 flow [2024-06-27 18:36:56,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5732, PETRI_PLACES=287, PETRI_TRANSITIONS=428} [2024-06-27 18:36:56,017 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 233 predicate places. [2024-06-27 18:36:56,017 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 428 transitions, 5732 flow [2024-06-27 18:36:56,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:56,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:36:56,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:36:56,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:36:56,018 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:36:56,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:36:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 633646056, now seen corresponding path program 4 times [2024-06-27 18:36:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:36:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303976305] [2024-06-27 18:36:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:36:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:36:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:36:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:36:56,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:36:56,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303976305] [2024-06-27 18:36:56,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303976305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:36:56,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:36:56,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:36:56,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769484943] [2024-06-27 18:36:56,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:36:56,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:36:56,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:36:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:36:56,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:36:57,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:36:57,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 428 transitions, 5732 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:36:57,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:36:57,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:36:57,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:36:59,340 INFO L124 PetriNetUnfolderBase]: 7220/11496 cut-off events. [2024-06-27 18:36:59,341 INFO L125 PetriNetUnfolderBase]: For 653585/653645 co-relation queries the response was YES. [2024-06-27 18:36:59,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88533 conditions, 11496 events. 7220/11496 cut-off events. For 653585/653645 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 75588 event pairs, 2231 based on Foata normal form. 27/11167 useless extension candidates. Maximal degree in co-relation 88396. Up to 9900 conditions per place. [2024-06-27 18:36:59,520 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 348 selfloop transitions, 67 changer transitions 0/465 dead transitions. [2024-06-27 18:36:59,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 465 transitions, 7087 flow [2024-06-27 18:36:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:36:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:36:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 18:36:59,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 18:36:59,521 INFO L175 Difference]: Start difference. First operand has 287 places, 428 transitions, 5732 flow. Second operand 8 states and 183 transitions. [2024-06-27 18:36:59,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 465 transitions, 7087 flow [2024-06-27 18:37:01,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 465 transitions, 7010 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 18:37:01,063 INFO L231 Difference]: Finished difference. Result has 292 places, 431 transitions, 5853 flow [2024-06-27 18:37:01,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5853, PETRI_PLACES=292, PETRI_TRANSITIONS=431} [2024-06-27 18:37:01,064 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 238 predicate places. [2024-06-27 18:37:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 431 transitions, 5853 flow [2024-06-27 18:37:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:01,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:01,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:37:01,065 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:01,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 505083104, now seen corresponding path program 5 times [2024-06-27 18:37:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106136877] [2024-06-27 18:37:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106136877] [2024-06-27 18:37:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106136877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:01,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622276151] [2024-06-27 18:37:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:01,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:01,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:01,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:01,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 431 transitions, 5853 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:01,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:01,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:01,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:04,336 INFO L124 PetriNetUnfolderBase]: 7213/11467 cut-off events. [2024-06-27 18:37:04,336 INFO L125 PetriNetUnfolderBase]: For 660989/661045 co-relation queries the response was YES. [2024-06-27 18:37:04,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88675 conditions, 11467 events. 7213/11467 cut-off events. For 660989/661045 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 75329 event pairs, 2219 based on Foata normal form. 34/11151 useless extension candidates. Maximal degree in co-relation 88536. Up to 9895 conditions per place. [2024-06-27 18:37:04,495 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 344 selfloop transitions, 70 changer transitions 0/464 dead transitions. [2024-06-27 18:37:04,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 464 transitions, 7014 flow [2024-06-27 18:37:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 18:37:04,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2024-06-27 18:37:04,496 INFO L175 Difference]: Start difference. First operand has 292 places, 431 transitions, 5853 flow. Second operand 8 states and 181 transitions. [2024-06-27 18:37:04,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 464 transitions, 7014 flow [2024-06-27 18:37:05,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 464 transitions, 6827 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 18:37:05,806 INFO L231 Difference]: Finished difference. Result has 295 places, 431 transitions, 5812 flow [2024-06-27 18:37:05,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5812, PETRI_PLACES=295, PETRI_TRANSITIONS=431} [2024-06-27 18:37:05,806 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 241 predicate places. [2024-06-27 18:37:05,807 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 431 transitions, 5812 flow [2024-06-27 18:37:05,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:05,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:05,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:37:05,807 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:05,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -602912320, now seen corresponding path program 1 times [2024-06-27 18:37:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698676224] [2024-06-27 18:37:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:06,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698676224] [2024-06-27 18:37:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698676224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:06,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534548972] [2024-06-27 18:37:06,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:06,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:06,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 18:37:06,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 431 transitions, 5812 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:06,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:06,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 18:37:06,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:09,048 INFO L124 PetriNetUnfolderBase]: 7019/11357 cut-off events. [2024-06-27 18:37:09,049 INFO L125 PetriNetUnfolderBase]: For 663295/663523 co-relation queries the response was YES. [2024-06-27 18:37:09,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87646 conditions, 11357 events. 7019/11357 cut-off events. For 663295/663523 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 76492 event pairs, 2855 based on Foata normal form. 26/11012 useless extension candidates. Maximal degree in co-relation 87506. Up to 9869 conditions per place. [2024-06-27 18:37:09,238 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 405 selfloop transitions, 32 changer transitions 0/461 dead transitions. [2024-06-27 18:37:09,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 461 transitions, 6882 flow [2024-06-27 18:37:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:37:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:37:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:37:09,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:37:09,239 INFO L175 Difference]: Start difference. First operand has 295 places, 431 transitions, 5812 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:37:09,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 461 transitions, 6882 flow [2024-06-27 18:37:10,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 461 transitions, 6584 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 18:37:10,924 INFO L231 Difference]: Finished difference. Result has 296 places, 434 transitions, 5678 flow [2024-06-27 18:37:10,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5678, PETRI_PLACES=296, PETRI_TRANSITIONS=434} [2024-06-27 18:37:10,925 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 242 predicate places. [2024-06-27 18:37:10,925 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 434 transitions, 5678 flow [2024-06-27 18:37:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:10,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:10,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:10,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:37:10,925 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:10,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -602907484, now seen corresponding path program 1 times [2024-06-27 18:37:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368878637] [2024-06-27 18:37:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:11,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:11,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368878637] [2024-06-27 18:37:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368878637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:11,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:11,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:11,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737847077] [2024-06-27 18:37:11,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:11,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:11,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:11,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 434 transitions, 5678 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:11,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:11,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:11,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:14,371 INFO L124 PetriNetUnfolderBase]: 7402/11854 cut-off events. [2024-06-27 18:37:14,371 INFO L125 PetriNetUnfolderBase]: For 685721/685766 co-relation queries the response was YES. [2024-06-27 18:37:14,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90581 conditions, 11854 events. 7402/11854 cut-off events. For 685721/685766 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 78851 event pairs, 3134 based on Foata normal form. 11/11560 useless extension candidates. Maximal degree in co-relation 90440. Up to 10505 conditions per place. [2024-06-27 18:37:14,545 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 421 selfloop transitions, 34 changer transitions 0/470 dead transitions. [2024-06-27 18:37:14,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 470 transitions, 6830 flow [2024-06-27 18:37:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 18:37:14,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:37:14,546 INFO L175 Difference]: Start difference. First operand has 296 places, 434 transitions, 5678 flow. Second operand 8 states and 184 transitions. [2024-06-27 18:37:14,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 470 transitions, 6830 flow [2024-06-27 18:37:16,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 470 transitions, 6762 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 18:37:16,129 INFO L231 Difference]: Finished difference. Result has 299 places, 438 transitions, 5795 flow [2024-06-27 18:37:16,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5610, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5795, PETRI_PLACES=299, PETRI_TRANSITIONS=438} [2024-06-27 18:37:16,129 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 245 predicate places. [2024-06-27 18:37:16,129 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 438 transitions, 5795 flow [2024-06-27 18:37:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:16,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:16,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:37:16,130 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:16,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash -599159584, now seen corresponding path program 2 times [2024-06-27 18:37:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:16,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453470467] [2024-06-27 18:37:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:16,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453470467] [2024-06-27 18:37:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453470467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:16,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:16,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:16,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019401565] [2024-06-27 18:37:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:16,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:17,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:17,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 438 transitions, 5795 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:17,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:17,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:17,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:19,781 INFO L124 PetriNetUnfolderBase]: 7484/11949 cut-off events. [2024-06-27 18:37:19,781 INFO L125 PetriNetUnfolderBase]: For 720784/720829 co-relation queries the response was YES. [2024-06-27 18:37:19,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93290 conditions, 11949 events. 7484/11949 cut-off events. For 720784/720829 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79165 event pairs, 3160 based on Foata normal form. 11/11660 useless extension candidates. Maximal degree in co-relation 93148. Up to 10508 conditions per place. [2024-06-27 18:37:19,936 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 414 selfloop transitions, 58 changer transitions 0/487 dead transitions. [2024-06-27 18:37:19,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 487 transitions, 7552 flow [2024-06-27 18:37:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:37:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:37:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 18:37:19,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 18:37:19,938 INFO L175 Difference]: Start difference. First operand has 299 places, 438 transitions, 5795 flow. Second operand 9 states and 200 transitions. [2024-06-27 18:37:19,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 487 transitions, 7552 flow [2024-06-27 18:37:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 487 transitions, 7395 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 18:37:21,335 INFO L231 Difference]: Finished difference. Result has 303 places, 454 transitions, 6189 flow [2024-06-27 18:37:21,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6189, PETRI_PLACES=303, PETRI_TRANSITIONS=454} [2024-06-27 18:37:21,335 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 249 predicate places. [2024-06-27 18:37:21,336 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 454 transitions, 6189 flow [2024-06-27 18:37:21,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:21,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:21,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:21,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:37:21,336 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:21,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash -599152826, now seen corresponding path program 1 times [2024-06-27 18:37:21,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:21,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924344033] [2024-06-27 18:37:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:21,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:22,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:22,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924344033] [2024-06-27 18:37:22,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924344033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:22,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36586785] [2024-06-27 18:37:22,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:22,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:22,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:22,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 454 transitions, 6189 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:22,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:22,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:22,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:25,148 INFO L124 PetriNetUnfolderBase]: 7480/11945 cut-off events. [2024-06-27 18:37:25,148 INFO L125 PetriNetUnfolderBase]: For 748944/748989 co-relation queries the response was YES. [2024-06-27 18:37:25,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94842 conditions, 11945 events. 7480/11945 cut-off events. For 748944/748989 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 79169 event pairs, 3167 based on Foata normal form. 11/11658 useless extension candidates. Maximal degree in co-relation 94698. Up to 10646 conditions per place. [2024-06-27 18:37:25,629 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 448 selfloop transitions, 26 changer transitions 0/489 dead transitions. [2024-06-27 18:37:25,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 489 transitions, 7445 flow [2024-06-27 18:37:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 18:37:25,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2024-06-27 18:37:25,630 INFO L175 Difference]: Start difference. First operand has 303 places, 454 transitions, 6189 flow. Second operand 8 states and 178 transitions. [2024-06-27 18:37:25,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 489 transitions, 7445 flow [2024-06-27 18:37:27,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 489 transitions, 7256 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-27 18:37:27,277 INFO L231 Difference]: Finished difference. Result has 307 places, 457 transitions, 6151 flow [2024-06-27 18:37:27,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6151, PETRI_PLACES=307, PETRI_TRANSITIONS=457} [2024-06-27 18:37:27,278 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 253 predicate places. [2024-06-27 18:37:27,278 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 457 transitions, 6151 flow [2024-06-27 18:37:27,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:27,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:27,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:27,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 18:37:27,279 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:27,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash -730763548, now seen corresponding path program 3 times [2024-06-27 18:37:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:27,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139739964] [2024-06-27 18:37:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:28,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:28,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139739964] [2024-06-27 18:37:28,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139739964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:28,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:28,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:28,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340482165] [2024-06-27 18:37:28,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:28,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:28,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:28,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:28,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:28,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:28,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 457 transitions, 6151 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:28,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:28,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:28,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:31,226 INFO L124 PetriNetUnfolderBase]: 7474/11938 cut-off events. [2024-06-27 18:37:31,226 INFO L125 PetriNetUnfolderBase]: For 759688/759733 co-relation queries the response was YES. [2024-06-27 18:37:31,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95331 conditions, 11938 events. 7474/11938 cut-off events. For 759688/759733 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 79154 event pairs, 3148 based on Foata normal form. 11/11650 useless extension candidates. Maximal degree in co-relation 95185. Up to 10496 conditions per place. [2024-06-27 18:37:31,548 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 414 selfloop transitions, 60 changer transitions 0/489 dead transitions. [2024-06-27 18:37:31,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 489 transitions, 7389 flow [2024-06-27 18:37:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:37:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:37:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 18:37:31,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 18:37:31,550 INFO L175 Difference]: Start difference. First operand has 307 places, 457 transitions, 6151 flow. Second operand 9 states and 198 transitions. [2024-06-27 18:37:31,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 489 transitions, 7389 flow [2024-06-27 18:37:33,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 489 transitions, 7216 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 18:37:33,318 INFO L231 Difference]: Finished difference. Result has 310 places, 457 transitions, 6106 flow [2024-06-27 18:37:33,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5978, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6106, PETRI_PLACES=310, PETRI_TRANSITIONS=457} [2024-06-27 18:37:33,319 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 256 predicate places. [2024-06-27 18:37:33,319 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 457 transitions, 6106 flow [2024-06-27 18:37:33,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:33,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:33,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 18:37:33,319 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:33,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 496511418, now seen corresponding path program 4 times [2024-06-27 18:37:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:33,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562271789] [2024-06-27 18:37:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:33,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:34,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:34,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562271789] [2024-06-27 18:37:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562271789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:34,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:34,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944025533] [2024-06-27 18:37:34,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:34,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:34,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 457 transitions, 6106 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:34,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:34,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:34,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:37,166 INFO L124 PetriNetUnfolderBase]: 7562/12032 cut-off events. [2024-06-27 18:37:37,166 INFO L125 PetriNetUnfolderBase]: For 782556/782623 co-relation queries the response was YES. [2024-06-27 18:37:37,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96607 conditions, 12032 events. 7562/12032 cut-off events. For 782556/782623 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 79424 event pairs, 3141 based on Foata normal form. 14/11745 useless extension candidates. Maximal degree in co-relation 96460. Up to 10492 conditions per place. [2024-06-27 18:37:37,342 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 409 selfloop transitions, 89 changer transitions 0/513 dead transitions. [2024-06-27 18:37:37,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 513 transitions, 8122 flow [2024-06-27 18:37:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 18:37:37,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869791666666667 [2024-06-27 18:37:37,344 INFO L175 Difference]: Start difference. First operand has 310 places, 457 transitions, 6106 flow. Second operand 8 states and 187 transitions. [2024-06-27 18:37:37,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 513 transitions, 8122 flow [2024-06-27 18:37:39,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 513 transitions, 7991 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 18:37:39,173 INFO L231 Difference]: Finished difference. Result has 313 places, 482 transitions, 6837 flow [2024-06-27 18:37:39,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6837, PETRI_PLACES=313, PETRI_TRANSITIONS=482} [2024-06-27 18:37:39,173 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 259 predicate places. [2024-06-27 18:37:39,174 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 482 transitions, 6837 flow [2024-06-27 18:37:39,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:39,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:39,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:39,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 18:37:39,174 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:39,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash 496518176, now seen corresponding path program 2 times [2024-06-27 18:37:39,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:39,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034966600] [2024-06-27 18:37:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:40,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034966600] [2024-06-27 18:37:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034966600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:40,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:40,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728513867] [2024-06-27 18:37:40,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:40,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:40,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:40,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:40,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 482 transitions, 6837 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:40,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:40,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:40,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:43,537 INFO L124 PetriNetUnfolderBase]: 7600/12093 cut-off events. [2024-06-27 18:37:43,537 INFO L125 PetriNetUnfolderBase]: For 821694/821761 co-relation queries the response was YES. [2024-06-27 18:37:43,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99450 conditions, 12093 events. 7600/12093 cut-off events. For 821694/821761 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79938 event pairs, 3137 based on Foata normal form. 19/11808 useless extension candidates. Maximal degree in co-relation 99300. Up to 10686 conditions per place. [2024-06-27 18:37:43,724 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 456 selfloop transitions, 56 changer transitions 0/527 dead transitions. [2024-06-27 18:37:43,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 527 transitions, 8681 flow [2024-06-27 18:37:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 18:37:43,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 18:37:43,726 INFO L175 Difference]: Start difference. First operand has 313 places, 482 transitions, 6837 flow. Second operand 8 states and 184 transitions. [2024-06-27 18:37:43,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 527 transitions, 8681 flow [2024-06-27 18:37:45,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 527 transitions, 8274 flow, removed 193 selfloop flow, removed 2 redundant places. [2024-06-27 18:37:45,994 INFO L231 Difference]: Finished difference. Result has 319 places, 488 transitions, 6823 flow [2024-06-27 18:37:45,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6530, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6823, PETRI_PLACES=319, PETRI_TRANSITIONS=488} [2024-06-27 18:37:45,995 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 265 predicate places. [2024-06-27 18:37:45,995 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 488 transitions, 6823 flow [2024-06-27 18:37:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:45,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:45,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:45,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 18:37:45,995 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:45,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash 496517928, now seen corresponding path program 5 times [2024-06-27 18:37:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:45,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362399614] [2024-06-27 18:37:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:45,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:46,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362399614] [2024-06-27 18:37:46,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362399614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:46,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:46,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817442572] [2024-06-27 18:37:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:46,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:46,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 488 transitions, 6823 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:46,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:46,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:46,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:49,990 INFO L124 PetriNetUnfolderBase]: 7633/12146 cut-off events. [2024-06-27 18:37:49,990 INFO L125 PetriNetUnfolderBase]: For 841684/841751 co-relation queries the response was YES. [2024-06-27 18:37:50,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100523 conditions, 12146 events. 7633/12146 cut-off events. For 841684/841751 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 80329 event pairs, 3144 based on Foata normal form. 14/11855 useless extension candidates. Maximal degree in co-relation 100371. Up to 10574 conditions per place. [2024-06-27 18:37:50,424 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 418 selfloop transitions, 95 changer transitions 0/528 dead transitions. [2024-06-27 18:37:50,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 528 transitions, 8431 flow [2024-06-27 18:37:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 18:37:50,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-06-27 18:37:50,429 INFO L175 Difference]: Start difference. First operand has 319 places, 488 transitions, 6823 flow. Second operand 8 states and 189 transitions. [2024-06-27 18:37:50,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 528 transitions, 8431 flow [2024-06-27 18:37:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 528 transitions, 8300 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 18:37:52,402 INFO L231 Difference]: Finished difference. Result has 324 places, 496 transitions, 7036 flow [2024-06-27 18:37:52,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7036, PETRI_PLACES=324, PETRI_TRANSITIONS=496} [2024-06-27 18:37:52,403 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 270 predicate places. [2024-06-27 18:37:52,403 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 496 transitions, 7036 flow [2024-06-27 18:37:52,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:52,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:52,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:52,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 18:37:52,404 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:52,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash 504792386, now seen corresponding path program 3 times [2024-06-27 18:37:52,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:52,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717124545] [2024-06-27 18:37:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:37:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:37:53,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:37:53,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717124545] [2024-06-27 18:37:53,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717124545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:37:53,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:37:53,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:37:53,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025894651] [2024-06-27 18:37:53,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:37:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:37:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:37:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:37:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:37:53,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 18:37:53,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 496 transitions, 7036 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:53,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:37:53,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 18:37:53,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:37:56,595 INFO L124 PetriNetUnfolderBase]: 7687/12222 cut-off events. [2024-06-27 18:37:56,595 INFO L125 PetriNetUnfolderBase]: For 860372/860439 co-relation queries the response was YES. [2024-06-27 18:37:56,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101849 conditions, 12222 events. 7687/12222 cut-off events. For 860372/860439 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 80856 event pairs, 3134 based on Foata normal form. 19/11934 useless extension candidates. Maximal degree in co-relation 101694. Up to 10786 conditions per place. [2024-06-27 18:37:56,776 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 462 selfloop transitions, 61 changer transitions 0/538 dead transitions. [2024-06-27 18:37:56,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 538 transitions, 8733 flow [2024-06-27 18:37:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:37:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:37:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 18:37:56,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-06-27 18:37:56,777 INFO L175 Difference]: Start difference. First operand has 324 places, 496 transitions, 7036 flow. Second operand 8 states and 183 transitions. [2024-06-27 18:37:56,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 538 transitions, 8733 flow [2024-06-27 18:37:59,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 538 transitions, 8536 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 18:37:59,282 INFO L231 Difference]: Finished difference. Result has 329 places, 499 transitions, 7057 flow [2024-06-27 18:37:59,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7057, PETRI_PLACES=329, PETRI_TRANSITIONS=499} [2024-06-27 18:37:59,283 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 275 predicate places. [2024-06-27 18:37:59,283 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 499 transitions, 7057 flow [2024-06-27 18:37:59,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:37:59,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:37:59,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:37:59,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 18:37:59,283 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:37:59,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:37:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash 633830320, now seen corresponding path program 6 times [2024-06-27 18:37:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:37:59,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722718960] [2024-06-27 18:37:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:37:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:37:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat